{"id":4876,"date":"2022-03-28T18:42:11","date_gmt":"2022-03-28T10:42:11","guid":{"rendered":"https:\/\/egonlin.com\/?p=4876"},"modified":"2022-04-11T19:08:23","modified_gmt":"2022-04-11T11:08:23","slug":"%e7%ac%ac%e5%9b%9b%e7%af%87%ef%bc%9a%e5%a4%9a%e8%bf%9b%e7%a8%8b%ef%bc%88%e6%93%8d%e4%bd%9c%e7%af%87%ef%bc%89","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=4876","title":{"rendered":"\u7b2c\u56db\u7bc7\uff1a\u591a\u8fdb\u7a0b\uff08\u64cd\u4f5c\u7bc7\uff09"},"content":{"rendered":"

\u591a\u8fdb\u7a0b\uff08\u5b9e\u64cd\uff09<\/h1>\n

\"\"<\/div><\/p>\n

\u4e00\u3001multiprocessing\u6a21\u5757\u4ecb\u7ecd<\/h2>\n

python\u4e2d\u7684\u591a\u7ebf\u7a0b\u65e0\u6cd5\u5229\u7528\u591a\u6838\u4f18\u52bf\uff0c\u5982\u679c\u60f3\u8981\u5145\u5206\u5730\u4f7f\u7528\u591a\u6838CPU\u7684\u8d44\u6e90\uff08os.cpu_count()\u67e5\u770b\uff09\uff0c\u5728python\u4e2d\u5927\u90e8\u5206\u60c5\u51b5\u9700\u8981\u4f7f\u7528\u591a\u8fdb\u7a0b\u3002Python\u63d0\u4f9b\u4e86multiprocessing\u3002 multiprocessing\u6a21\u5757\u7528\u6765\u5f00\u542f\u5b50\u8fdb\u7a0b\uff0c\u5e76\u5728\u5b50\u8fdb\u7a0b\u4e2d\u6267\u884c\u6211\u4eec\u5b9a\u5236\u7684\u4efb\u52a1\uff08\u6bd4\u5982\u51fd\u6570\uff09\uff0c\u8be5\u6a21\u5757\u4e0e\u591a\u7ebf\u7a0b\u6a21\u5757threading\u7684\u7f16\u7a0b\u63a5\u53e3\u7c7b\u4f3c\u3002<\/p>\n

multiprocessing\u6a21\u5757\u7684\u529f\u80fd\u4f17\u591a\uff1a\u652f\u6301\u5b50\u8fdb\u7a0b\u3001\u901a\u4fe1\u548c\u5171\u4eab\u6570\u636e\u3001\u6267\u884c\u4e0d\u540c\u5f62\u5f0f\u7684\u540c\u6b65\uff0c\u63d0\u4f9b\u4e86Process\u3001Queue\u3001Pipe\u3001Lock\u7b49\u7ec4\u4ef6\u3002<\/p>\n

\u9700\u8981\u518d\u6b21\u5f3a\u8c03\u7684\u4e00\u70b9\u662f\uff1a\u4e0e\u7ebf\u7a0b\u4e0d\u540c\uff0c\u8fdb\u7a0b\u6ca1\u6709\u4efb\u4f55\u5171\u4eab\u72b6\u6001\uff0c\u8fdb\u7a0b\u4fee\u6539\u7684\u6570\u636e\uff0c\u6539\u52a8\u4ec5\u9650\u4e8e\u8be5\u8fdb\u7a0b\u5185\u3002<\/p>\n

\u4e8c\u3001Process\u7c7b\u7684\u4ecb\u7ecd<\/h2>\n

*\u521b\u5efa\u8fdb\u7a0b\u7684\u7c7b*<\/em><\/strong>\uff1a<\/p>\n

Process([group [, target [, name [, args [, kwargs]]]]])\uff0c\u7531\u8be5\u7c7b\u5b9e\u4f8b\u5316\u5f97\u5230\u7684\u5bf9\u8c61\uff0c\u8868\u793a\u4e00\u4e2a\u5b50\u8fdb\u7a0b\u4e2d\u7684\u4efb\u52a1\uff08\u5c1a\u672a\u542f\u52a8\uff09*
\n*
\n<\/em>\u5f3a\u8c03\uff1a
\n<\/em>1. \u9700\u8981\u4f7f\u7528\u5173\u952e\u5b57\u7684\u65b9\u5f0f\u6765\u6307\u5b9a\u53c2\u6570
\n<\/em>2. args\u6307\u5b9a\u7684\u4e3a\u4f20\u7ed9target\u51fd\u6570\u7684\u4f4d\u7f6e\u53c2\u6570\uff0c\u662f\u4e00\u4e2a\u5143\u7ec4\u5f62\u5f0f\uff0c\u5fc5\u987b\u6709\u9017\u53f7<\/p>\n

*\u53c2\u6570\u4ecb\u7ecd\uff1a*<\/em><\/strong><\/p>\n

1 group\u53c2\u6570\u672a\u4f7f\u7528\uff0c\u503c\u59cb\u7ec8\u4e3aNone\n2 \n3 target\u8868\u793a\u8c03\u7528\u5bf9\u8c61\uff0c\u5373\u5b50\u8fdb\u7a0b\u8981\u6267\u884c\u7684\u4efb\u52a1\n4 \n5 args\u8868\u793a\u8c03\u7528\u5bf9\u8c61\u7684\u4f4d\u7f6e\u53c2\u6570\u5143\u7ec4\uff0cargs=(1,2,'egon',)\n6 \n7 kwargs\u8868\u793a\u8c03\u7528\u5bf9\u8c61\u7684\u5b57\u5178,kwargs={'name':'egon','age':18}\n8 \n9 name\u4e3a\u5b50\u8fdb\u7a0b\u7684\u540d\u79f0<\/code><\/pre>\n
*\u65b9\u6cd5\u4ecb\u7ecd\uff1a*<\/em><\/strong><\/p>\n
1 p.start()\uff1a\u542f\u52a8\u8fdb\u7a0b\uff0c\u5e76\u8c03\u7528\u8be5\u5b50\u8fdb\u7a0b\u4e2d\u7684p.run() \n 2 p.run():\u8fdb\u7a0b\u542f\u52a8\u65f6\u8fd0\u884c\u7684\u65b9\u6cd5\uff0c\u6b63\u662f\u5b83\u53bb\u8c03\u7528target\u6307\u5b9a\u7684\u51fd\u6570\uff0c\u6211\u4eec\u81ea\u5b9a\u4e49\u7c7b\u7684\u7c7b\u4e2d\u4e00\u5b9a\u8981\u5b9e\u73b0\u8be5\u65b9\u6cd5  \n 3 \n 4 p.terminate():\u5f3a\u5236\u7ec8\u6b62\u8fdb\u7a0bp\uff0c\u4e0d\u4f1a\u8fdb\u884c\u4efb\u4f55\u6e05\u7406\u64cd\u4f5c\uff0c\u5982\u679cp\u521b\u5efa\u4e86\u5b50\u8fdb\u7a0b\uff0c\u8be5\u5b50\u8fdb\u7a0b\u5c31\u6210\u4e86\u50f5\u5c38\u8fdb\u7a0b\uff0c\u4f7f\u7528\u8be5\u65b9\u6cd5\u9700\u8981\u7279\u522b\u5c0f\u5fc3\u8fd9\u79cd\u60c5\u51b5\u3002\u5982\u679cp\u8fd8\u4fdd\u5b58\u4e86\u4e00\u4e2a\u9501\u90a3\u4e48\u4e5f\u5c06\u4e0d\u4f1a\u88ab\u91ca\u653e\uff0c\u8fdb\u800c\u5bfc\u81f4\u6b7b\u9501\n 5 p.is_alive():\u5982\u679cp\u4ecd\u7136\u8fd0\u884c\uff0c\u8fd4\u56deTrue\n 6 \n 7 p.join([timeout]):\u4e3b\u7ebf\u7a0b\u7b49\u5f85p\u7ec8\u6b62\uff08\u5f3a\u8c03\uff1a\u662f\u4e3b\u7ebf\u7a0b\u5904\u4e8e\u7b49\u7684\u72b6\u6001\uff0c\u800cp\u662f\u5904\u4e8e\u8fd0\u884c\u7684\u72b6\u6001\uff09\u3002timeout\u662f\u53ef\u9009\u7684\u8d85\u65f6\u65f6\u95f4\uff0c\u9700\u8981\u5f3a\u8c03\u7684\u662f\uff0cp.join\u53ea\u80fdjoin\u4f4fstart\u5f00\u542f\u7684\u8fdb\u7a0b\uff0c\u800c\u4e0d\u80fdjoin\u4f4frun\u5f00\u542f\u7684\u8fdb\u7a0b<\/code><\/pre>\n
*\u5c5e\u6027\u4ecb\u7ecd\uff1a*<\/em><\/strong><\/p>\n
1 p.daemon\uff1a\u9ed8\u8ba4\u503c\u4e3aFalse\uff0c\u5982\u679c\u8bbe\u4e3aTrue\uff0c\u4ee3\u8868p\u4e3a\u540e\u53f0\u8fd0\u884c\u7684\u5b88\u62a4\u8fdb\u7a0b\uff0c\u5f53p\u7684\u7236\u8fdb\u7a0b\u7ec8\u6b62\u65f6\uff0cp\u4e5f\u968f\u4e4b\u7ec8\u6b62\uff0c\u5e76\u4e14\u8bbe\u5b9a\u4e3aTrue\u540e\uff0cp\u4e0d\u80fd\u521b\u5efa\u81ea\u5df1\u7684\u65b0\u8fdb\u7a0b\uff0c\u5fc5\u987b\u5728p.start()\u4e4b\u524d\u8bbe\u7f6e\n2 \n3 p.name:\u8fdb\u7a0b\u7684\u540d\u79f0\n4 \n5 p.pid\uff1a\u8fdb\u7a0b\u7684pid\n6 \n7 p.exitcode:\u8fdb\u7a0b\u5728\u8fd0\u884c\u65f6\u4e3aNone\u3001\u5982\u679c\u4e3a\u2013N\uff0c\u8868\u793a\u88ab\u4fe1\u53f7N\u7ed3\u675f(\u4e86\u89e3\u5373\u53ef)\n8 \n9 p.authkey:\u8fdb\u7a0b\u7684\u8eab\u4efd\u9a8c\u8bc1\u952e,\u9ed8\u8ba4\u662f\u7531os.urandom()\u968f\u673a\u751f\u6210\u768432\u5b57\u7b26\u7684\u5b57\u7b26\u4e32\u3002\u8fd9\u4e2a\u952e\u7684\u7528\u9014\u662f\u4e3a\u6d89\u53ca\u7f51\u7edc\u8fde\u63a5\u7684\u5e95\u5c42\u8fdb\u7a0b\u95f4\u901a\u4fe1\u63d0\u4f9b\u5b89\u5168\u6027\uff0c\u8fd9\u7c7b\u8fde\u63a5\u53ea\u6709\u5728\u5177\u6709\u76f8\u540c\u7684\u8eab\u4efd\u9a8c\u8bc1\u952e\u65f6\u624d\u80fd\u6210\u529f\uff08\u4e86\u89e3\u5373\u53ef\uff09<\/code><\/pre>\n
\u4e09\u3001Process\u7c7b\u7684\u4f7f\u7528<\/h2>\n
\\<\/em>\u6ce8\u610f\uff1a\u5728windows\u4e2dProcess()\u5fc5\u987b\u653e\u5230*** <\/em><\/strong>*if name<\/strong> == ‘main<\/strong>‘:*<\/em>*\\<\/em>\u4e0b\\<\/strong><\/strong><\/p>\n
\u8be6\u7ec6\u89e3\u91ca<\/p>\n
Since Windows has no fork, the multiprocessing module starts a new Python process and<\/strong> imports the calling module. 
\n<\/em>If Process() gets called upon import, then this sets off an infinite succession of new processes (or<\/strong> until your machine runs out of resources). 
\n<\/em>This is<\/strong> the reason for<\/strong> hiding calls to Process() inside
\n
\n<\/strong><\/em>if name<\/strong> == "main<\/strong>"
\n<\/em>since statements inside this <\/strong>if-statement will <\/strong>not* get called upon import.<\/em>
\n\u7531\u4e8eWindows\u6ca1\u6709fork\uff0c\u591a\u5904\u7406\u6a21\u5757\u542f\u52a8\u4e00\u4e2a\u65b0\u7684Python\u8fdb\u7a0b\u5e76\u5bfc\u5165\u8c03\u7528\u6a21\u5757\u3002 <\/em>
\n\u5982\u679c\u5728\u5bfc\u5165\u65f6\u8c03\u7528Process\uff08\uff09\uff0c\u90a3\u4e48\u8fd9\u5c06\u542f\u52a8\u65e0\u9650\u7ee7\u627f\u7684\u65b0\u8fdb\u7a0b\uff08\u6216\u76f4\u5230\u673a\u5668\u8017\u5c3d\u8d44\u6e90\uff09\u3002 <\/em>
\n*\u8fd9\u662f\u9690\u85cf\u5bf9Process\uff08\uff09\u5185\u90e8\u8c03\u7528\u7684\u539f\uff0c\u4f7f\u7528if name<\/strong> == \u201cmain <\/strong>\u201d\uff0c\u8fd9\u4e2aif\u8bed\u53e5\u4e2d\u7684\u8bed\u53e5\u5c06\u4e0d\u4f1a\u5728\u5bfc\u5165\u65f6\u88ab\u8c03\u7528\u3002<\/p>\n
*\u521b\u5efa\u5e76\u5f00\u542f\u5b50\u8fdb\u7a0b\u7684\u4e24\u79cd\u65b9\u5f0f*<\/em><\/strong><\/p>\n
\u65b9\u6cd5\u4e00<\/p>\n
#\u5f00\u8fdb\u7a0b\u7684\u65b9\u6cd5\u4e00:\nimport time\nimport random\nfrom multiprocessing import Process\ndef Eat(name):\n    print('%s Eating' %name)\n    time.sleep(random.randrange(1,5))\n    print('%s Eat end' %name)\n\np1=Process(target=Eat,args=('egon',)) #\u5fc5\u987b\u52a0,\u53f7\np2=Process(target=Eat,args=('alex',))\np3=Process(target=Eat,args=('wupeqi',))\np4=Process(target=Eat,args=('yuanhao',))\n\np1.start()\np2.start()\np3.start()\np4.start()\nprint('\u4e3b\u7ebf\u7a0b')<\/code><\/pre>\n
\u65b9\u6cd5\u4e8c<\/p>\n
#\u5f00\u8fdb\u7a0b\u7684\u65b9\u6cd5\u4e8c:\nimport time\nimport random\nfrom multiprocessing import Process\n\nclass Eat(Process):\n    def __init__(self,name):\n        super().__init__()\n        self.name=name\n    def run(self):\n        print('%s Eating' %self.name)\n\n        time.sleep(random.randrange(1,5))\n        print('%s Eat end' %self.name)\n\np1=Eat('egon')\np2=Eat('alex')\np3=Eat('wupeiqi')\np4=Eat('yuanhao')\n\np1.start() #start\u4f1a\u81ea\u52a8\u8c03\u7528run\np2.start()\np3.start()\np4.start()\nprint('\u4e3b\u7ebf\u7a0b')<\/code><\/pre>\n
*\u8fdb\u7a0b\u76f4\u63a5\u7684\u5185\u5b58\u7a7a\u95f4\u662f\u9694\u79bb\u7684*<\/em><\/strong><\/p>\n
from multiprocessing import Process\nn=100 #\u5728windows\u7cfb\u7edf\u4e2d\u5e94\u8be5\u628a\u5168\u5c40\u53d8\u91cf\u5b9a\u4e49\u5728if __name__ == '__main__'\u4e4b\u4e0a\u5c31\u53ef\u4ee5\u4e86\ndef work():\n    global n\n    n=0\n    print('\u5b50\u8fdb\u7a0b\u5185: ',n)\n\nif __name__ == '__main__':\n    p=Process(target=work)\n    p.start()\n    print('\u4e3b\u8fdb\u7a0b\u5185: ',n)<\/code><\/pre>\n
\u7ec3\u4e601\uff1a\u628a\u6240\u5b66\u7684socket\u901a\u4fe1\u53d8\u6210\u5e76\u53d1\u7684\u5f62\u5f0f<\/p>\n
server\u7aef<\/p>\n
from socket import *\nfrom multiprocessing import Process\n\nserver=socket(AF_INET,SOCK_STREAM)\nserver.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)\nserver.bind(('127.0.0.1',8080))\nserver.listen(5)\n\ndef talk(conn,client_addr):\n    while True:\n        try:\n            msg=conn.recv(1024)\n            if not msg:break\n            conn.send(msg.upper())\n        except Exception:\n            break\n\nif __name__ == '__main__': #windows\u4e0bstart\u8fdb\u7a0b\u4e00\u5b9a\u8981\u5199\u5230\u8fd9\u4e0b\u9762\n    while True:\n        conn,client_addr=server.accept()\n        p=Process(target=talk,args=(conn,client_addr))\n        p.start()<\/code><\/pre>\n
\u591a\u4e2aclient\u7aef<\/p>\n
from socket import *\n\nclient=socket(AF_INET,SOCK_STREAM)\nclient.connect(('127.0.0.1',8080))\n\nwhile True:\n    msg=input('>>: ').strip()\n    if not msg:continue\n\n    client.send(msg.encode('utf-8'))\n    msg=client.recv(1024)\n    print(msg.decode('utf-8'))<\/code><\/pre>\n
\u8fd9\u4e48\u5b9e\u73b0\u6709\u6ca1\u6709\u95ee\u9898\uff1f\uff1f\uff1f<\/p>\n
\u6bcf\u6765\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u90fd\u5728\u670d\u52a1\u7aef\u5f00\u542f\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u5982\u679c\u5e76\u53d1\u6765\u4e00\u4e2a\u4e07\u4e2a\u5ba2\u6237\u7aef\uff0c\u8981\u5f00\u542f\u4e00\u4e07\u4e2a\u8fdb\u7a0b\u5417\uff0c\u4f60\u81ea\u5df1\u5c1d\u8bd5\u7740\u5728\u4f60\u81ea\u5df1\u7684\u673a\u5668\u4e0a\u5f00\u542f\u4e00\u4e07\u4e2a\uff0c10\u4e07\u4e2a\u8fdb\u7a0b\u8bd5\u4e00\u8bd5\u3002
\n<\/em>\u89e3\u51b3\u65b9\u6cd5\uff1a\u8fdb\u7a0b\u6c60<\/p>\n
*<\/em>*Process\u5bf9\u8c61\u7684join\u65b9\u6cd5**\\<\/em><\/strong><\/p>\n
join\uff1a\u4e3b\u8fdb\u7a0b\u7b49\uff0c\u7b49\u5f85\u5b50\u8fdb\u7a0b\u7ed3\u675f<\/p>\n
from multiprocessing import Process\nimport time\nimport random\n\nclass Eat(Process):\n    def __init__(self,name):\n        self.name=name\n        super().__init__()\n    def run(self):\n        print('%s is eating' %self.name)\n        time.sleep(random.randrange(1,3))\n        print('%s finishes eating' %self.name)\n\np=Eat('egon')\np.start()\np.join(0.0001) #\u7b49\u5f85p\u505c\u6b62,\u7b490.0001\u79d2\u5c31\u4e0d\u518d\u7b49\u4e86\nprint('\u5f00\u59cb')<\/code><\/pre>\n
\u6709\u4e86join\uff0c\u7a0b\u5e8f\u4e0d\u5c31\u662f\u4e32\u884c\u4e86\u5417\uff1f\uff1f\uff1f<\/p>\n
from multiprocessing import Process\nimport time\nimport random\ndef eat(name):\n    print('%s is eating' %name)\n    time.sleep(random.randint(1,3))\n    print('%s finishes eating' %name)\n\np1=Process(target=Eat,args=('egon',))\np2=Process(target=Eat,args=('alex',))\np3=Process(target=Eat,args=('yuanhao',))\np4=Process(target=Eat,args=('wupeiqi',))\n\np1.start()\np2.start()\np3.start()\np4.start()\n\n#\u6709\u7684\u540c\u5b66\u4f1a\u6709\u7591\u95ee:\u65e2\u7136join\u662f\u7b49\u5f85\u8fdb\u7a0b\u7ed3\u675f,\u90a3\u4e48\u6211\u50cf\u4e0b\u9762\u8fd9\u6837\u5199,\u8fdb\u7a0b\u4e0d\u5c31\u53c8\u53d8\u6210\u4e32\u884c\u7684\u4e86\u5417?\n#\u5f53\u7136\u4e0d\u662f\u4e86,\u5fc5\u987b\u660e\u786e\uff1ap.join()\u662f\u8ba9\u8c01\u7b49\uff1f\n#\u5f88\u660e\u663ep.join()\u662f\u8ba9\u4e3b\u7ebf\u7a0b\u7b49\u5f85p\u7684\u7ed3\u675f\uff0c\u5361\u4f4f\u7684\u662f\u4e3b\u7ebf\u7a0b\u800c\u7edd\u975e\u8fdb\u7a0bp\uff0c\n\n#\u8be6\u7ec6\u89e3\u6790\u5982\u4e0b\uff1a\n#\u8fdb\u7a0b\u53ea\u8981start\u5c31\u4f1a\u5728\u5f00\u59cb\u8fd0\u884c\u4e86,\u6240\u4ee5p1-p4.start()\u65f6,\u7cfb\u7edf\u4e2d\u5df2\u7ecf\u6709\u56db\u4e2a\u5e76\u53d1\u7684\u8fdb\u7a0b\u4e86\n#\u800c\u6211\u4eecp1.join()\u662f\u5728\u7b49p1\u7ed3\u675f,\u6ca1\u9519p1\u53ea\u8981\u4e0d\u7ed3\u675f\u4e3b\u7ebf\u7a0b\u5c31\u4f1a\u4e00\u76f4\u5361\u5728\u539f\u5730,\u8fd9\u4e5f\u662f\u95ee\u9898\u7684\u5173\u952e\n#join\u662f\u8ba9\u4e3b\u7ebf\u7a0b\u7b49,\u800cp1-p4\u4ecd\u7136\u662f\u5e76\u53d1\u6267\u884c\u7684,p1.join\u7684\u65f6\u5019,\u5176\u4f59p2,p3,p4\u4ecd\u7136\u5728\u8fd0\u884c,\u7b49#p1.join\u7ed3\u675f,\u53ef\u80fdp2,p3,p4\u65e9\u5df2\u7ecf\u7ed3\u675f\u4e86,\u8fd9\u6837p2.join,p3.join.p4.join\u76f4\u63a5\u901a\u8fc7\u68c0\u6d4b\uff0c\u65e0\u9700\u7b49\u5f85\n# \u6240\u4ee54\u4e2ajoin\u82b1\u8d39\u7684\u603b\u65f6\u95f4\u4ecd\u7136\u662f\u8017\u8d39\u65f6\u95f4\u6700\u957f\u7684\u90a3\u4e2a\u8fdb\u7a0b\u8fd0\u884c\u7684\u65f6\u95f4\np1.join()\np2.join()\np3.join()\np4.join()\n\nprint('\u4e3b\u7ebf\u7a0b')\n\n#\u4e0a\u8ff0\u542f\u52a8\u8fdb\u7a0b\u4e0ejoin\u8fdb\u7a0b\u53ef\u4ee5\u7b80\u5199\u4e3a\n# p_l=[p1,p2,p3,p4]\n# \n# for p in p_l:\n#     p.start()\n# \n# for p in p_l:\n#     p.join()<\/code><\/pre>\n
*Process\u5bf9\u8c61\u7684\u5176\u4ed6\u65b9\u6cd5\u6216\u5c5e\u6027\uff08\u4e86\u89e3\uff09*<\/em><\/strong><\/p>\n
terminate\u4e0eis_alive<\/p>\n
#\u8fdb\u7a0b\u5bf9\u8c61\u7684\u5176\u4ed6\u65b9\u6cd5\u4e00:terminate,is_alive\nfrom multiprocessing import Process\nimport time\nimport random\n\nclass Eat(Process):\n    def __init__(self,name):\n        self.name=name\n        super().__init__()\n\n    def run(self):\n        print('%s is eating' %self.name)\n        time.sleep(random.randrange(1,5))\n        print('%s finishes eating' %self.name)\n\np1=Eat('egon1')\np1.start()\n\np1.terminate()#\u5173\u95ed\u8fdb\u7a0b,\u4e0d\u4f1a\u7acb\u5373\u5173\u95ed,\u6240\u4ee5is_alive\u7acb\u523b\u67e5\u770b\u7684\u7ed3\u679c\u53ef\u80fd\u8fd8\u662f\u5b58\u6d3b\nprint(p1.is_alive()) #\u7ed3\u679c\u4e3aTrue\n\nprint('\u5f00\u59cb')\nprint(p1.is_alive()) #\u7ed3\u679c\u4e3aFalse<\/code><\/pre>\n
name\u4e0epid<\/p>\n
from multiprocessing import Process\nimport time\nimport random\nclass Eat(Process):\n    def __init__(self,name):\n        # self.name=name\n        # super().__init__() #Process\u7684__init__\u65b9\u6cd5\u4f1a\u6267\u884cself.name=Eat-1,\n        #                    #\u6240\u4ee5\u52a0\u5230\u8fd9\u91cc,\u4f1a\u8986\u76d6\u6211\u4eec\u7684self.name=name\n\n        #\u4e3a\u6211\u4eec\u5f00\u542f\u7684\u8fdb\u7a0b\u8bbe\u7f6e\u540d\u5b57\u7684\u505a\u6cd5\n        super().__init__()\n        self.name=name\n\n    def run(self):\n        print('%s is eating' %self.name)\n        time.sleep(random.randrange(1,3))\n        print('%s finishes eating' %self.name)\n\np=Eat('egon')\np.start()\nprint('\u5f00\u59cb')\nprint(p.pid) #\u67e5\u770bpid<\/code><\/pre>\n
\"\"<\/div><\/p>\n
*\u50f5\u5c38\u8fdb\u7a0b\u4e0e\u5b64\u513f\u8fdb\u7a0b\uff08\u4e86\u89e3\uff09*<\/em><\/strong><\/p>\n
\u53c2\u8003\u535a\u5ba2\uff1ahttp:\/\/www.cnblogs.com\/Anker\/p\/3271773.html\n\n\u4e00\uff1a\u50f5\u5c38\u8fdb\u7a0b\uff08\u6709\u5bb3\uff09\n\u3000\u3000\u50f5\u5c38\u8fdb\u7a0b\uff1a\u4e00\u4e2a\u8fdb\u7a0b\u4f7f\u7528fork\u521b\u5efa\u5b50\u8fdb\u7a0b\uff0c\u5982\u679c\u5b50\u8fdb\u7a0b\u9000\u51fa\uff0c\u800c\u7236\u8fdb\u7a0b\u5e76\u6ca1\u6709\u8c03\u7528wait\u6216waitpid\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u72b6\u6001\u4fe1\u606f\uff0c\u90a3\u4e48\u5b50\u8fdb\u7a0b\u7684\u8fdb\u7a0b\u63cf\u8ff0\u7b26\u4ecd\u7136\u4fdd\u5b58\u5728\u7cfb\u7edf\u4e2d\u3002\u8fd9\u79cd\u8fdb\u7a0b\u79f0\u4e4b\u4e3a\u50f5\u6b7b\u8fdb\u7a0b\u3002\u8be6\u89e3\u5982\u4e0b\n\n\u6211\u4eec\u77e5\u9053\u5728unix\/linux\u4e2d\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u5b50\u8fdb\u7a0b\u662f\u901a\u8fc7\u7236\u8fdb\u7a0b\u521b\u5efa\u7684\uff0c\u5b50\u8fdb\u7a0b\u5728\u521b\u5efa\u65b0\u7684\u8fdb\u7a0b\u3002\u5b50\u8fdb\u7a0b\u7684\u7ed3\u675f\u548c\u7236\u8fdb\u7a0b\u7684\u8fd0\u884c\u662f\u4e00\u4e2a\u5f02\u6b65\u8fc7\u7a0b,\u5373\u7236\u8fdb\u7a0b\u6c38\u8fdc\u65e0\u6cd5\u9884\u6d4b\u5b50\u8fdb\u7a0b\u5230\u5e95\u4ec0\u4e48\u65f6\u5019\u7ed3\u675f\uff0c\u5982\u679c\u5b50\u8fdb\u7a0b\u4e00\u7ed3\u675f\u5c31\u7acb\u523b\u56de\u6536\u5176\u5168\u90e8\u8d44\u6e90\uff0c\u90a3\u4e48\u5728\u7236\u8fdb\u7a0b\u5185\u5c06\u65e0\u6cd5\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7684\u72b6\u6001\u4fe1\u606f\u3002\n\n\u56e0\u6b64\uff0cUN\u2168\u63d0\u4f9b\u4e86\u4e00\u79cd\u673a\u5236\u53ef\u4ee5\u4fdd\u8bc1\u7236\u8fdb\u7a0b\u53ef\u4ee5\u5728\u4efb\u610f\u65f6\u523b\u83b7\u53d6\u5b50\u8fdb\u7a0b\u7ed3\u675f\u65f6\u7684\u72b6\u6001\u4fe1\u606f\uff1a\n1\u3001\u5728\u6bcf\u4e2a\u8fdb\u7a0b\u9000\u51fa\u7684\u65f6\u5019\uff0c\u5185\u6838\u91ca\u653e\u8be5\u8fdb\u7a0b\u6240\u6709\u7684\u8d44\u6e90\uff0c\u5305\u62ec\u6253\u5f00\u7684\u6587\u4ef6\uff0c\u5360\u7528\u7684\u5185\u5b58\u7b49\u3002\u4f46\u662f\u4ecd\u7136\u4e3a\u5176\u4fdd\u7559\u4e00\u5b9a\u7684\u4fe1\u606f\uff08\u5305\u62ec\u8fdb\u7a0b\u53f7the process ID\uff0c\u9000\u51fa\u72b6\u6001the termination status of the process\uff0c\u8fd0\u884c\u65f6\u95f4the amount of CPU time taken by the process\u7b49\uff09\n2\u3001\u76f4\u5230\u7236\u8fdb\u7a0b\u901a\u8fc7wait \/ waitpid\u6765\u53d6\u65f6\u624d\u91ca\u653e. \u4f46\u8fd9\u6837\u5c31\u5bfc\u81f4\u4e86\u95ee\u9898\uff0c\u5982\u679c\u8fdb\u7a0b\u4e0d\u8c03\u7528wait \/ waitpid\u7684\u8bdd\uff0c\u90a3\u4e48\u4fdd\u7559\u7684\u90a3\u6bb5\u4fe1\u606f\u5c31\u4e0d\u4f1a\u91ca\u653e\uff0c\u5176\u8fdb\u7a0b\u53f7\u5c31\u4f1a\u4e00\u76f4\u88ab\u5360\u7528\uff0c\u4f46\u662f\u7cfb\u7edf\u6240\u80fd\u4f7f\u7528\u7684\u8fdb\u7a0b\u53f7\u662f\u6709\u9650\u7684\uff0c\u5982\u679c\u5927\u91cf\u7684\u4ea7\u751f\u50f5\u6b7b\u8fdb\u7a0b\uff0c\u5c06\u56e0\u4e3a\u6ca1\u6709\u53ef\u7528\u7684\u8fdb\u7a0b\u53f7\u800c\u5bfc\u81f4\u7cfb\u7edf\u4e0d\u80fd\u4ea7\u751f\u65b0\u7684\u8fdb\u7a0b. \u6b64\u5373\u4e3a\u50f5\u5c38\u8fdb\u7a0b\u7684\u5371\u5bb3\uff0c\u5e94\u5f53\u907f\u514d\u3002\n\n\u3000\u3000\u4efb\u4f55\u4e00\u4e2a\u5b50\u8fdb\u7a0b(init\u9664\u5916)\u5728exit()\u4e4b\u540e\uff0c\u5e76\u975e\u9a6c\u4e0a\u5c31\u6d88\u5931\u6389\uff0c\u800c\u662f\u7559\u4e0b\u4e00\u4e2a\u79f0\u4e3a\u50f5\u5c38\u8fdb\u7a0b(Zombie)\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7b49\u5f85\u7236\u8fdb\u7a0b\u5904\u7406\u3002\u8fd9\u662f\u6bcf\u4e2a\u5b50\u8fdb\u7a0b\u5728\u7ed3\u675f\u65f6\u90fd\u8981\u7ecf\u8fc7\u7684\u9636\u6bb5\u3002\u5982\u679c\u5b50\u8fdb\u7a0b\u5728exit()\u4e4b\u540e\uff0c\u7236\u8fdb\u7a0b\u6ca1\u6709\u6765\u5f97\u53ca\u5904\u7406\uff0c\u8fd9\u65f6\u7528ps\u547d\u4ee4\u5c31\u80fd\u770b\u5230\u5b50\u8fdb\u7a0b\u7684\u72b6\u6001\u662f\u201cZ\u201d\u3002\u5982\u679c\u7236\u8fdb\u7a0b\u80fd\u53ca\u65f6 \u5904\u7406\uff0c\u53ef\u80fd\u7528ps\u547d\u4ee4\u5c31\u6765\u4e0d\u53ca\u770b\u5230\u5b50\u8fdb\u7a0b\u7684\u50f5\u5c38\u72b6\u6001\uff0c\u4f46\u8fd9\u5e76\u4e0d\u7b49\u4e8e\u5b50\u8fdb\u7a0b\u4e0d\u7ecf\u8fc7\u50f5\u5c38\u72b6\u6001\u3002  \u5982\u679c\u7236\u8fdb\u7a0b\u5728\u5b50\u8fdb\u7a0b\u7ed3\u675f\u4e4b\u524d\u9000\u51fa\uff0c\u5219\u5b50\u8fdb\u7a0b\u5c06\u7531init\u63a5\u7ba1\u3002init\u5c06\u4f1a\u4ee5\u7236\u8fdb\u7a0b\u7684\u8eab\u4efd\u5bf9\u50f5\u5c38\u72b6\u6001\u7684\u5b50\u8fdb\u7a0b\u8fdb\u884c\u5904\u7406\u3002\n\n\u4e8c\uff1a\u5b64\u513f\u8fdb\u7a0b\uff08\u65e0\u5bb3\uff09\n\n\u3000\u3000\u5b64\u513f\u8fdb\u7a0b\uff1a\u4e00\u4e2a\u7236\u8fdb\u7a0b\u9000\u51fa\uff0c\u800c\u5b83\u7684\u4e00\u4e2a\u6216\u591a\u4e2a\u5b50\u8fdb\u7a0b\u8fd8\u5728\u8fd0\u884c\uff0c\u90a3\u4e48\u90a3\u4e9b\u5b50\u8fdb\u7a0b\u5c06\u6210\u4e3a\u5b64\u513f\u8fdb\u7a0b\u3002\u5b64\u513f\u8fdb\u7a0b\u5c06\u88abinit\u8fdb\u7a0b(\u8fdb\u7a0b\u53f7\u4e3a1)\u6240\u6536\u517b\uff0c\u5e76\u7531init\u8fdb\u7a0b\u5bf9\u5b83\u4eec\u5b8c\u6210\u72b6\u6001\u6536\u96c6\u5de5\u4f5c\u3002\n\n\u3000\u3000\u5b64\u513f\u8fdb\u7a0b\u662f\u6ca1\u6709\u7236\u8fdb\u7a0b\u7684\u8fdb\u7a0b\uff0c\u5b64\u513f\u8fdb\u7a0b\u8fd9\u4e2a\u91cd\u4efb\u5c31\u843d\u5230\u4e86init\u8fdb\u7a0b\u8eab\u4e0a\uff0cinit\u8fdb\u7a0b\u5c31\u597d\u50cf\u662f\u4e00\u4e2a\u6c11\u653f\u5c40\uff0c\u4e13\u95e8\u8d1f\u8d23\u5904\u7406\u5b64\u513f\u8fdb\u7a0b\u7684\u5584\u540e\u5de5\u4f5c\u3002\u6bcf\u5f53\u51fa\u73b0\u4e00\u4e2a\u5b64\u513f\u8fdb\u7a0b\u7684\u65f6\u5019\uff0c\u5185\u6838\u5c31\u628a\u5b64 \u513f\u8fdb\u7a0b\u7684\u7236\u8fdb\u7a0b\u8bbe\u7f6e\u4e3ainit\uff0c\u800cinit\u8fdb\u7a0b\u4f1a\u5faa\u73af\u5730wait()\u5b83\u7684\u5df2\u7ecf\u9000\u51fa\u7684\u5b50\u8fdb\u7a0b\u3002\u8fd9\u6837\uff0c\u5f53\u4e00\u4e2a\u5b64\u513f\u8fdb\u7a0b\u51c4\u51c9\u5730\u7ed3\u675f\u4e86\u5176\u751f\u547d\u5468\u671f\u7684\u65f6\u5019\uff0cinit\u8fdb\u7a0b\u5c31\u4f1a\u4ee3\u8868\u515a\u548c\u653f\u5e9c\u51fa\u9762\u5904\u7406\u5b83\u7684\u4e00\u5207\u5584\u540e\u5de5\u4f5c\u3002\u56e0\u6b64\u5b64\u513f\u8fdb\u7a0b\u5e76\u4e0d\u4f1a\u6709\u4ec0\u4e48\u5371\u5bb3\u3002\n\n\u6211\u4eec\u6765\u6d4b\u8bd5\u4e00\u4e0b\uff08\u521b\u5efa\u5b8c\u5b50\u8fdb\u7a0b\u540e\uff0c\u4e3b\u8fdb\u7a0b\u6240\u5728\u7684\u8fd9\u4e2a\u811a\u672c\u5c31\u9000\u51fa\u4e86\uff0c\u5f53\u7236\u8fdb\u7a0b\u5148\u4e8e\u5b50\u8fdb\u7a0b\u7ed3\u675f\u65f6\uff0c\u5b50\u8fdb\u7a0b\u4f1a\u88abinit\u6536\u517b\uff0c\u6210\u4e3a\u5b64\u513f\u8fdb\u7a0b\uff0c\u800c\u975e\u50f5\u5c38\u8fdb\u7a0b\uff09\uff0c\u6587\u4ef6\u5185\u5bb9\n\nimport os\nimport sys\nimport time\n\npid = os.getpid()\nppid = os.getppid()\nprint 'im father', 'pid', pid, 'ppid', ppid\npid = os.fork()\n#\u6267\u884cpid=os.fork()\u5219\u4f1a\u751f\u6210\u4e00\u4e2a\u5b50\u8fdb\u7a0b\n#\u8fd4\u56de\u503cpid\u6709\u4e24\u79cd\u503c\uff1a\n#    \u5982\u679c\u8fd4\u56de\u7684pid\u503c\u4e3a0\uff0c\u8868\u793a\u5728\u5b50\u8fdb\u7a0b\u5f53\u4e2d\n#    \u5982\u679c\u8fd4\u56de\u7684pid\u503c>0\uff0c\u8868\u793a\u5728\u7236\u8fdb\u7a0b\u5f53\u4e2d\nif pid > 0:\n    print 'father died..'\n    sys.exit(0)\n\n# \u4fdd\u8bc1\u4e3b\u7ebf\u7a0b\u9000\u51fa\u5b8c\u6bd5\ntime.sleep(1)\nprint 'im child', os.getpid(), os.getppid()\n\n\u6267\u884c\u6587\u4ef6\uff0c\u8f93\u51fa\u7ed3\u679c\uff1a\nim father pid 32515 ppid 32015\nfather died..\nim child 32516 1\n\n\u770b\uff0c\u5b50\u8fdb\u7a0b\u5df2\u7ecf\u88abpid\u4e3a1\u7684init\u8fdb\u7a0b\u63a5\u6536\u4e86\uff0c\u6240\u4ee5\u50f5\u5c38\u8fdb\u7a0b\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u662f\u4e0d\u5b58\u5728\u7684\uff0c\u5b58\u5728\u53ea\u6709\u5b64\u513f\u8fdb\u7a0b\u800c\u5df2\uff0c\u5b64\u513f\u8fdb\u7a0b\u58f0\u660e\u5468\u671f\u7ed3\u675f\u81ea\u7136\u4f1a\u88abinit\u6765\u9500\u6bc1\u3002\n\n\u4e09\uff1a\u50f5\u5c38\u8fdb\u7a0b\u5371\u5bb3\u573a\u666f\uff1a\n\n\u3000\u3000\u4f8b\u5982\u6709\u4e2a\u8fdb\u7a0b\uff0c\u5b83\u5b9a\u671f\u7684\u4ea7 \u751f\u4e00\u4e2a\u5b50\u8fdb\u7a0b\uff0c\u8fd9\u4e2a\u5b50\u8fdb\u7a0b\u9700\u8981\u505a\u7684\u4e8b\u60c5\u5f88\u5c11\uff0c\u505a\u5b8c\u5b83\u8be5\u505a\u7684\u4e8b\u60c5\u4e4b\u540e\u5c31\u9000\u51fa\u4e86\uff0c\u56e0\u6b64\u8fd9\u4e2a\u5b50\u8fdb\u7a0b\u7684\u751f\u547d\u5468\u671f\u5f88\u77ed\uff0c\u4f46\u662f\uff0c\u7236\u8fdb\u7a0b\u53ea\u7ba1\u751f\u6210\u65b0\u7684\u5b50\u8fdb\u7a0b\uff0c\u81f3\u4e8e\u5b50\u8fdb\u7a0b \u9000\u51fa\u4e4b\u540e\u7684\u4e8b\u60c5\uff0c\u5219\u4e00\u6982\u4e0d\u95fb\u4e0d\u95ee\uff0c\u8fd9\u6837\uff0c\u7cfb\u7edf\u8fd0\u884c\u4e0a\u4e00\u6bb5\u65f6\u95f4\u4e4b\u540e\uff0c\u7cfb\u7edf\u4e2d\u5c31\u4f1a\u5b58\u5728\u5f88\u591a\u7684\u50f5\u6b7b\u8fdb\u7a0b\uff0c\u5018\u82e5\u7528ps\u547d\u4ee4\u67e5\u770b\u7684\u8bdd\uff0c\u5c31\u4f1a\u770b\u5230\u5f88\u591a\u72b6\u6001\u4e3aZ\u7684\u8fdb\u7a0b\u3002 \u4e25\u683c\u5730\u6765\u8bf4\uff0c\u50f5\u6b7b\u8fdb\u7a0b\u5e76\u4e0d\u662f\u95ee\u9898\u7684\u6839\u6e90\uff0c\u7f6a\u9b41\u7978\u9996\u662f\u4ea7\u751f\u51fa\u5927\u91cf\u50f5\u6b7b\u8fdb\u7a0b\u7684\u90a3\u4e2a\u7236\u8fdb\u7a0b\u3002\u56e0\u6b64\uff0c\u5f53\u6211\u4eec\u5bfb\u6c42\u5982\u4f55\u6d88\u706d\u7cfb\u7edf\u4e2d\u5927\u91cf\u7684\u50f5\u6b7b\u8fdb\u7a0b\u65f6\uff0c\u7b54\u6848\u5c31\u662f\u628a\u4ea7\u751f\u5927 \u91cf\u50f5\u6b7b\u8fdb\u7a0b\u7684\u90a3\u4e2a\u5143\u51f6\u67aa\u6bd9\u6389\uff08\u4e5f\u5c31\u662f\u901a\u8fc7kill\u53d1\u9001SIGTERM\u6216\u8005SIGKILL\u4fe1\u53f7\u5566\uff09\u3002\u67aa\u6bd9\u4e86\u5143\u51f6\u8fdb\u7a0b\u4e4b\u540e\uff0c\u5b83\u4ea7\u751f\u7684\u50f5\u6b7b\u8fdb\u7a0b\u5c31\u53d8\u6210\u4e86\u5b64\u513f\u8fdb \u7a0b\uff0c\u8fd9\u4e9b\u5b64\u513f\u8fdb\u7a0b\u4f1a\u88abinit\u8fdb\u7a0b\u63a5\u7ba1\uff0cinit\u8fdb\u7a0b\u4f1await()\u8fd9\u4e9b\u5b64\u513f\u8fdb\u7a0b\uff0c\u91ca\u653e\u5b83\u4eec\u5360\u7528\u7684\u7cfb\u7edf\u8fdb\u7a0b\u8868\u4e2d\u7684\u8d44\u6e90\uff0c\u8fd9\u6837\uff0c\u8fd9\u4e9b\u5df2\u7ecf\u50f5\u6b7b\u7684\u5b64\u513f\u8fdb\u7a0b \u5c31\u80fd\u7791\u76ee\u800c\u53bb\u4e86\u3002\n\n\u56db\uff1a\u6d4b\u8bd5\n#1\u3001\u4ea7\u751f\u50f5\u5c38\u8fdb\u7a0b\u7684\u7a0b\u5e8ftest.py\u5185\u5bb9\u5982\u4e0b\n\n#coding:utf-8\nfrom multiprocessing import Process\nimport time,os\n\ndef run():\n    print('\u5b50',os.getpid())\n\nif __name__ == '__main__':\n    p=Process(target=run)\n    p.start()\n\n    print('\u4e3b',os.getpid())\n    time.sleep(1000)\n\n#2\u3001\u5728unix\u6216linux\u7cfb\u7edf\u4e0a\u6267\u884c\n[root@vm172-31-0-19 ~]# python3  test.py &\n[1] 18652\n[root@vm172-31-0-19 ~]# \u4e3b 18652\n\u5b50 18653\n\n[root@vm172-31-0-19 ~]# ps aux |grep Z\nUSER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND\nroot     18653  0.0  0.0      0     0 pts\/0    Z    20:02   0:00 [python3] <defunct> #\u51fa\u73b0\u50f5\u5c38\u8fdb\u7a0b\nroot     18656  0.0  0.0 112648   952 pts\/0    S+   20:02   0:00 grep --color=auto Z\n\n[root@vm172-31-0-19 ~]# top #\u6267\u884ctop\u547d\u4ee4\u53d1\u73b01zombie\ntop - 20:03:42 up 31 min,  3 users,  load average: 0.01, 0.06, 0.12\nTasks:  93 total,   2 running,  90 sleeping,   0 stopped,   1 zombie\n%Cpu(s):  0.0 us,  0.3 sy,  0.0 ni, 99.7 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st\nKiB Mem :  1016884 total,    97184 free,    70848 used,   848852 buff\/cache\nKiB Swap:        0 total,        0 free,        0 used.   782540 avail Mem \n\n  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND                                                                                                                                        \nroot      20   0   29788   1256    988 S  0.3  0.1   0:01.50 elfin                                                                                                                      \n\n#3\u3001\n\u7b49\u5f85\u7236\u8fdb\u7a0b\u6b63\u5e38\u7ed3\u675f\u540e\u4f1a\u8c03\u7528wait\uff0fwaitpid\u53bb\u56de\u6536\u50f5\u5c38\u8fdb\u7a0b\n\u4f46\u5982\u679c\u7236\u8fdb\u7a0b\u662f\u4e00\u4e2a\u6b7b\u5faa\u73af\uff0c\u6c38\u8fdc\u4e0d\u4f1a\u7ed3\u675f\uff0c\u90a3\u4e48\u8be5\u50f5\u5c38\u8fdb\u7a0b\u5c31\u4f1a\u4e00\u76f4\u5b58\u5728\uff0c\u50f5\u5c38\u8fdb\u7a0b\u8fc7\u591a\uff0c\u5c31\u662f\u6709\u5bb3\u7684\n\u89e3\u51b3\u65b9\u6cd5\u4e00\uff1a\u6740\u6b7b\u7236\u8fdb\u7a0b\n\u89e3\u51b3\u65b9\u6cd5\u4e8c\uff1a\u5bf9\u5f00\u542f\u7684\u5b50\u8fdb\u7a0b\u5e94\u8be5\u8bb0\u5f97\u4f7f\u7528join\uff0cjoin\u4f1a\u56de\u6536\u50f5\u5c38\u8fdb\u7a0b\n\u53c2\u8003python2\u6e90\u7801\u6ce8\u91ca\nclass Process(object):\n    def join(self, timeout=None):\n        '''\n        Wait until child process terminates\n        '''\n        assert self._parent_pid == os.getpid(), 'can only join a child process'\n        assert self._popen is not None, 'can only join a started process'\n        res = self._popen.wait(timeout)\n        if res is not None:\n            _current_process._children.discard(self)\n\njoin\u65b9\u6cd5\u4e2d\u8c03\u7528\u4e86wait\uff0c\u544a\u8bc9\u7cfb\u7edf\u91ca\u653e\u50f5\u5c38\u8fdb\u7a0b\u3002discard\u4e3a\u4ece\u81ea\u5df1\u7684children\u4e2d\u5254\u9664\n\n\u89e3\u51b3\u65b9\u6cd5\u4e09\uff1ahttp:\/\/blog.csdn.net\/u010571844\/article\/details\/50419798\n\u601d\u8003\uff1a\nfrom multiprocessing import Process\nimport time,os\n\ndef task():\n    print('%s is running' %os.getpid())\n    time.sleep(3)\n\nif __name__ == '__main__':\n    p=Process(target=task)\n    p.start()\n    p.join() # \u7b49\u5f85\u8fdb\u7a0bp\u7ed3\u675f\u540e\uff0cjoin\u51fd\u6570\u5185\u90e8\u4f1a\u53d1\u9001\u7cfb\u7edf\u8c03\u7528wait\uff0c\u53bb\u544a\u8bc9\u64cd\u4f5c\u7cfb\u7edf\u56de\u6536\u6389\u8fdb\u7a0bp\u7684id\u53f7\n\n    print(p.pid) #\uff1f\uff1f\uff1f\u6b64\u65f6\u80fd\u5426\u770b\u5230\u5b50\u8fdb\u7a0bp\u7684id\u53f7\n    print('\u4e3b')<\/code><\/pre>\n
\u7b54\u6848<\/p>\n
*#\u7b54\u6848\uff1a\u53ef\u4ee5
\n<\/strong>#\u5206\u6790\uff1a
\np.join()\u662f\u50cf\u64cd\u4f5c\u7cfb\u7edf\u53d1\u9001\u8bf7\u6c42\uff0c\u544a\u77e5\u64cd\u4f5c\u7cfb\u7edfp\u7684id\u53f7\u4e0d\u9700\u8981\u518d\u5360\u7528\u4e86\uff0c\u56de\u6536\u5c31\u53ef\u4ee5\uff0c<\/em>
\n\u6b64\u65f6\u5728\u7236\u8fdb\u7a0b\u5185\u8fd8\u53ef\u4ee5\u770b\u5230p.pid,\u4f46\u6b64\u65f6\u7684p.pid\u662f\u4e00\u4e2a\u65e0\u610f\u4e49\u7684id\u53f7\uff0c\u56e0\u4e3a\u64cd\u4f5c\u7cfb\u7edf\u5df2\u7ecf\u5c06\u8be5\u7f16\u53f7\u56de\u6536<\/em>
\n<\/strong>
\n\u6253\u4e2a\u6bd4\u65b9\uff1a<\/em>
\n\u6211\u515a\u76f8\u5f53\u4e8e\u64cd\u4f5c\u7cfb\u7edf\uff0c\u63a7\u5236\u7740\u6574\u4e2a\u4e2d\u56fd\u7684\u786c\u4ef6\uff0c\u6bcf\u4e2a\u4eba\u76f8\u5f53\u4e8e\u4e00\u4e2a\u8fdb\u7a0b\uff0c\u6bcf\u4e2a\u4eba\u90fd\u9700\u8981\u8ddf\u6211\u515a\u7533\u8bf7\u4e00\u4e2a\u8eab\u4efd\u8bc1\u53f7<\/em>
\n\u8be5\u53f7\u7801\u5c31\u76f8\u5f53\u4e8e\u8fdb\u7a0b\u7684pid\uff0c\u4eba\u6b7b\u540e\u5e94\u8be5\u5230\u6211\u515a\u90a3\u91cc\u6ce8\u9500\u8eab\u4efd\u8bc1\u53f7\uff0cp.join()\u5c31\u76f8\u5f53\u4e8e\u8981\u6c42\u6211\u515a\u56de\u6536\u8eab\u4efd\u8bc1\u53f7\uff0c\u4f46p\u7684\u5bb6\u4eba\uff08\u76f8\u5f53\u4e8e\u4e3b\u8fdb\u7a0b\uff09<\/em>
\n*\u4ecd\u7136\u6301\u6709p\u7684\u8eab\u4efd\u8bc1\uff0c\u4f46\u6b64\u523b\u7684\u8eab\u4efd\u8bc1\u5df2\u7ecf\u6ca1\u6709\u610f\u4e49<\/p>\n
\u56db\u3001\u5b88\u62a4\u8fdb\u7a0b<\/h2>\n
\u4e3b\u8fdb\u7a0b\u521b\u5efa\u5b88\u62a4\u8fdb\u7a0b<\/p>\n
\u5176\u4e00\uff1a\u5b88\u62a4\u8fdb\u7a0b\u4f1a\u5728\u4e3b\u8fdb\u7a0b\u4ee3\u7801\u6267\u884c\u7ed3\u675f\u540e\u5c31\u7ec8\u6b62<\/p>\n
\u5176\u4e8c\uff1a\u5b88\u62a4\u8fdb\u7a0b\u5185\u65e0\u6cd5\u518d\u5f00\u542f\u5b50\u8fdb\u7a0b,\u5426\u5219\u629b\u51fa\u5f02\u5e38\uff1aAssertionError: daemonic processes are not allowed to have children<\/p>\n
\u6ce8\u610f\uff1a\u8fdb\u7a0b\u4e4b\u95f4\u662f\u4e92\u76f8\u72ec\u7acb\u7684\uff0c\u4e3b\u8fdb\u7a0b\u4ee3\u7801\u8fd0\u884c\u7ed3\u675f\uff0c\u5b88\u62a4\u8fdb\u7a0b\u968f\u5373\u7ec8\u6b62<\/p>\n
from multiprocessing import Process\nimport time\nimport random\n\nclass Eat(Process):\n    def __init__(self,name):\n        self.name=name\n        super().__init__()\n    def run(self):\n        print('%s is Eating' %self.name)\n        time.sleep(random.randrange(1,3))\n        print('%s is Eat end' %self.name)\n\np=Eat('egon')\np.daemon=True #\u4e00\u5b9a\u8981\u5728p.start()\u524d\u8bbe\u7f6e,\u8bbe\u7f6ep\u4e3a\u5b88\u62a4\u8fdb\u7a0b,\u7981\u6b62p\u521b\u5efa\u5b50\u8fdb\u7a0b,\u5e76\u4e14\u7236\u8fdb\u7a0b\u4ee3\u7801\u6267\u884c\u7ed3\u675f,p\u5373\u7ec8\u6b62\u8fd0\u884c\np.start()\nprint('\u4e3b')<\/code><\/pre>\n
\u8ff7\u60d1\u4eba\u7684\u4f8b\u5b50<\/p>\n
#\u4e3b\u8fdb\u7a0b\u4ee3\u7801\u8fd0\u884c\u5b8c\u6bd5,\u5b88\u62a4\u8fdb\u7a0b\u5c31\u4f1a\u7ed3\u675f\nfrom multiprocessing import Process\nfrom threading import Thread\nimport time\ndef foo():\n    print(123)\n    time.sleep(1)\n    print("end123")\n\ndef bar():\n    print(456)\n    time.sleep(3)\n    print("end456")\n\np1=Process(target=foo)\np2=Process(target=bar)\n\np1.daemon=True\np1.start()\np2.start()\nprint("main-------") #\u6253\u5370\u8be5\u884c\u5219\u4e3b\u8fdb\u7a0b\u4ee3\u7801\u7ed3\u675f,\u5219\u5b88\u62a4\u8fdb\u7a0bp1\u5e94\u8be5\u88ab\u7ec8\u6b62,\u53ef\u80fd\u4f1a\u6709p1\u4efb\u52a1\u6267\u884c\u7684\u6253\u5370\u4fe1\u606f123,\u56e0\u4e3a\u4e3b\u8fdb\u7a0b\u6253\u5370main----\u65f6,p1\u4e5f\u6267\u884c\u4e86,\u4f46\u662f\u968f\u5373\u88ab\u7ec8\u6b62<\/code><\/pre>\n
\u4e94\u3001\u8fdb\u7a0b\u540c\u6b65(\u9501)<\/h2>\n
\u8fdb\u7a0b\u4e4b\u95f4\u6570\u636e\u4e0d\u5171\u4eab,\u4f46\u662f\u5171\u4eab\u540c\u4e00\u5957\u6587\u4ef6\u7cfb\u7edf,\u6240\u4ee5\u8bbf\u95ee\u540c\u4e00\u4e2a\u6587\u4ef6,\u6216\u540c\u4e00\u4e2a\u6253\u5370\u7ec8\u7aef,\u662f\u6ca1\u6709\u95ee\u9898\u7684,<\/p>\n
\u800c\u5171\u4eab\u5e26\u6765\u7684\u662f\u7ade\u4e89\uff0c\u7ade\u4e89\u5e26\u6765\u7684\u7ed3\u679c\u5c31\u662f\u9519\u4e71\uff0c\u5982\u4f55\u63a7\u5236\uff0c\u5c31\u662f\u52a0\u9501\u5904\u7406<\/p>\n
part1\uff1a\u591a\u4e2a\u8fdb\u7a0b\u5171\u4eab\u540c\u4e00\u6253\u5370\u7ec8\u7aef<\/p>\n
\u5e76\u53d1\u8fd0\u884c,\u6548\u7387\u9ad8,\u4f46\u7ade\u4e89\u540c\u4e00\u6253\u5370\u7ec8\u7aef,\u5e26\u6765\u4e86\u6253\u5370\u9519\u4e71<\/p>\n
#\u5e76\u53d1\u8fd0\u884c,\u6548\u7387\u9ad8,\u4f46\u7ade\u4e89\u540c\u4e00\u6253\u5370\u7ec8\u7aef,\u5e26\u6765\u4e86\u6253\u5370\u9519\u4e71\nfrom multiprocessing import Process\nimport os,time\ndef work():\n    print('%s is running' %os.getpid())\n    time.sleep(2)\n    print('%s is done' %os.getpid())\n\nif __name__ == '__main__':\n    for i in range(3):\n        p=Process(target=work)\n        p.start()<\/code><\/pre>\n
\u52a0\u9501\uff1a\u7531\u5e76\u53d1\u53d8\u6210\u4e86\u4e32\u884c,\u727a\u7272\u4e86\u8fd0\u884c\u6548\u7387,\u4f46\u907f\u514d\u4e86\u7ade\u4e89<\/p>\n
#\u7531\u5e76\u53d1\u53d8\u6210\u4e86\u4e32\u884c,\u727a\u7272\u4e86\u8fd0\u884c\u6548\u7387,\u4f46\u907f\u514d\u4e86\u7ade\u4e89\nfrom multiprocessing import Process,Lock\nimport os,time\ndef work(lock):\n    lock.acquire()\n    print('%s is running' %os.getpid())\n    time.sleep(2)\n    print('%s is done' %os.getpid())\n    lock.release()\nif __name__ == '__main__':\n    lock=Lock()\n    for i in range(3):\n        p=Process(target=work,args=(lock,))\n        p.start()<\/code><\/pre>\n
part2\uff1a\u591a\u4e2a\u8fdb\u7a0b\u5171\u4eab\u540c\u4e00\u6587\u4ef6<\/p>\n
\u6587\u4ef6\u5f53\u6570\u636e\u5e93\uff0c\u6a21\u62df\u62a2\u7968<\/p>\n
\u5e76\u53d1\u8fd0\u884c\uff0c\u6548\u7387\u9ad8\uff0c\u4f46\u7ade\u4e89\u5199\u540c\u4e00\u6587\u4ef6\uff0c\u6570\u636e\u5199\u5165\u9519\u4e71<\/p>\n
#\u6587\u4ef6db\u7684\u5185\u5bb9\u4e3a\uff1a{"count":1}\n#\u6ce8\u610f\u4e00\u5b9a\u8981\u7528\u53cc\u5f15\u53f7\uff0c\u4e0d\u7136json\u65e0\u6cd5\u8bc6\u522b\nfrom multiprocessing import Process,Lock\nimport time,json,random\ndef search():\n    dic=json.load(open('db.txt'))\n    print('\\033[43m\u5269\u4f59\u7968\u6570%s\\033[0m' %dic['count'])\n\ndef get():\n    dic=json.load(open('db.txt'))\n    time.sleep(0.1) #\u6a21\u62df\u8bfb\u6570\u636e\u7684\u7f51\u7edc\u5ef6\u8fdf\n    if dic['count'] >0:\n        dic['count']-=1\n        time.sleep(0.2) #\u6a21\u62df\u5199\u6570\u636e\u7684\u7f51\u7edc\u5ef6\u8fdf\n        json.dump(dic,open('db.txt','w'))\n        print('\\033[43m\u8d2d\u7968\u6210\u529f\\033[0m')\n\ndef task(lock):\n    search()\n    get()\nif __name__ == '__main__':\n    lock=Lock()\n    for i in range(100): #\u6a21\u62df\u5e76\u53d1100\u4e2a\u5ba2\u6237\u7aef\u62a2\u7968\n        p=Process(target=task,args=(lock,))\n        p.start()<\/code><\/pre>\n
\u52a0\u9501\uff1a\u8d2d\u7968\u884c\u4e3a\u7531\u5e76\u53d1\u53d8\u6210\u4e86\u4e32\u884c\uff0c\u727a\u7272\u4e86\u8fd0\u884c\u6548\u7387\uff0c\u4f46\u4fdd\u8bc1\u4e86\u6570\u636e\u5b89\u5168<\/p>\n
#\u6587\u4ef6db\u7684\u5185\u5bb9\u4e3a\uff1a{"count":1}\n#\u6ce8\u610f\u4e00\u5b9a\u8981\u7528\u53cc\u5f15\u53f7\uff0c\u4e0d\u7136json\u65e0\u6cd5\u8bc6\u522b\nfrom multiprocessing import Process,Lock\nimport time,json,random\ndef search():\n    dic=json.load(open('db.txt'))\n    print('\\033[43m\u5269\u4f59\u7968\u6570%s\\033[0m' %dic['count'])\n\ndef get():\n    dic=json.load(open('db.txt'))\n    time.sleep(0.1) #\u6a21\u62df\u8bfb\u6570\u636e\u7684\u7f51\u7edc\u5ef6\u8fdf\n    if dic['count'] >0:\n        dic['count']-=1\n        time.sleep(0.2) #\u6a21\u62df\u5199\u6570\u636e\u7684\u7f51\u7edc\u5ef6\u8fdf\n        json.dump(dic,open('db.txt','w'))\n        print('\\033[43m\u8d2d\u7968\u6210\u529f\\033[0m')\n\ndef task(lock):\n    search()\n    lock.acquire()\n    get()\n    lock.release()\nif __name__ == '__main__':\n    lock=Lock()\n    for i in range(100): #\u6a21\u62df\u5e76\u53d1100\u4e2a\u5ba2\u6237\u7aef\u62a2\u7968\n        p=Process(target=task,args=(lock,))\n        p.start()<\/code><\/pre>\n
\u603b\u7ed3\uff1a<\/p>\n
*#\u52a0\u9501\u53ef\u4ee5\u4fdd\u8bc1\u591a\u4e2a\u8fdb\u7a0b\u4fee\u6539\u540c\u4e00\u5757\u6570\u636e\u65f6\uff0c\u540c\u4e00\u65f6\u95f4\u53ea\u80fd\u6709\u4e00\u4e2a\u4efb\u52a1\u53ef\u4ee5\u8fdb\u884c\u4fee\u6539\uff0c\u5373\u4e32\u884c\u7684\u4fee\u6539\uff0c\u6ca1\u9519\uff0c\u901f\u5ea6\u662f\u6162\u4e86\uff0c\u4f46\u727a\u7272\u4e86\u901f\u5ea6\u5374\u4fdd\u8bc1\u4e86\u6570\u636e\u5b89\u5168\u3002
\n\u867d\u7136\u53ef\u4ee5\u7528\u6587\u4ef6\u5171\u4eab\u6570\u636e\u5b9e\u73b0\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff0c\u4f46\u95ee\u9898\u662f\uff1a<\/em>
\n1.\u6548\u7387\u4f4e\uff08\u5171\u4eab\u6570\u636e\u57fa\u4e8e\u6587\u4ef6\uff0c\u800c\u6587\u4ef6\u662f\u786c\u76d8\u4e0a\u7684\u6570\u636e\uff09<\/em>
\n2.\u9700\u8981\u81ea\u5df1\u52a0\u9501\u5904\u7406<\/em>
\n<\/strong>
\n
\n<\/strong>
\n#\u56e0\u6b64\u6211\u4eec\u6700\u597d\u627e\u5bfb\u4e00\u79cd\u89e3\u51b3\u65b9\u6848\u80fd\u591f\u517c\u987e\uff1a1\u3001\u6548\u7387\u9ad8\uff08\u591a\u4e2a\u8fdb\u7a0b\u5171\u4eab\u4e00\u5757\u5185\u5b58\u7684\u6570\u636e\uff092\u3001\u5e2e\u6211\u4eec\u5904\u7406\u597d\u9501\u95ee\u9898\u3002\u8fd9\u5c31\u662fmutiprocessing\u6a21\u5757\u4e3a\u6211\u4eec\u63d0\u4f9b\u7684\u57fa\u4e8e\u6d88\u606f\u7684IPC\u901a\u4fe1\u673a\u5236\uff1a\u961f\u5217\u548c\u7ba1\u9053\u3002<\/strong>
\n1 \u961f\u5217\u548c\u7ba1\u9053\u90fd\u662f\u5c06\u6570\u636e\u5b58\u653e\u4e8e\u5185\u5b58\u4e2d<\/em>
\n2 \u961f\u5217\u53c8\u662f\u57fa\u4e8e\uff08\u7ba1\u9053+\u9501\uff09\u5b9e\u73b0\u7684\uff0c\u53ef\u4ee5\u8ba9\u6211\u4eec\u4ece\u590d\u6742\u7684\u9501\u95ee\u9898\u4e2d\u89e3\u8131\u51fa\u6765\uff0c<\/em>
\n*\u6211\u4eec\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u5171\u4eab\u6570\u636e\uff0c\u5c3d\u53ef\u80fd\u4f7f\u7528\u6d88\u606f\u4f20\u9012\u548c\u961f\u5217\uff0c\u907f\u514d\u5904\u7406\u590d\u6742\u7684\u540c\u6b65\u548c\u9501\u95ee\u9898\uff0c\u800c\u4e14\u5728\u8fdb\u7a0b\u6570\u76ee\u589e\u591a\u65f6\uff0c\u5f80\u5f80\u53ef\u4ee5\u83b7\u5f97\u66f4\u597d\u7684\u53ef\u83b7\u5c55\u6027\u3002<\/p>\n
\u516d\u3001*\u961f\u5217\uff08\u63a8\u8350\u4f7f\u7528\uff09*<\/em><\/strong><\/h2>\n
\u8fdb\u7a0b\u5f7c\u6b64\u4e4b\u95f4\u4e92\u76f8\u9694\u79bb\uff0c\u8981\u5b9e\u73b0\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff08IPC\uff09\uff0cmultiprocessing\u6a21\u5757\u652f\u6301\u4e24\u79cd\u5f62\u5f0f\uff1a\u961f\u5217\u548c\u7ba1\u9053\uff0c\u8fd9\u4e24\u79cd\u65b9\u5f0f\u90fd\u662f\u4f7f\u7528\u6d88\u606f\u4f20\u9012\u7684<\/p>\n
*\u521b\u5efa\u961f\u5217\u7684\u7c7b\uff08\u5e95\u5c42\u5c31\u662f\u4ee5\u7ba1\u9053\u548c\u9501\u5b9a\u7684\u65b9\u5f0f\u5b9e\u73b0\uff09*<\/em><\/strong>\uff1a<\/p>\n
1 Queue([maxsize]):\u521b\u5efa\u5171\u4eab\u7684\u8fdb\u7a0b\u961f\u5217\uff0cQueue\u662f\u591a\u8fdb\u7a0b\u5b89\u5168\u7684\u961f\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528Queue\u5b9e\u73b0\u591a\u8fdb\u7a0b\u4e4b\u95f4\u7684\u6570\u636e\u4f20\u9012\u3002<\/p>\n
*\u53c2\u6570\u4ecb\u7ecd\uff1a*<\/em><\/strong><\/p>\n
1 maxsize\u662f\u961f\u5217\u4e2d\u5141\u8bb8\u6700\u5927\u9879\u6570\uff0c\u7701\u7565\u5219\u65e0\u5927\u5c0f\u9650\u5236\u3002<\/p>\n
*\u65b9\u6cd5\u4ecb\u7ecd\uff1a*<\/em><\/strong><\/p>\n
\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n
1 q.put\u65b9\u6cd5\u7528\u4ee5\u63d2\u5165\u6570\u636e\u5230\u961f\u5217\u4e2d\uff0cput\u65b9\u6cd5\u8fd8\u6709\u4e24\u4e2a\u53ef\u9009\u53c2\u6570\uff1ablocked\u548ctimeout\u3002\u5982\u679cblocked\u4e3aTrue\uff08\u9ed8\u8ba4\u503c\uff09\uff0c\u5e76\u4e14timeout\u4e3a\u6b63\u503c\uff0c\u8be5\u65b9\u6cd5\u4f1a\u963b\u585etimeout\u6307\u5b9a\u7684\u65f6\u95f4\uff0c\u76f4\u5230\u8be5\u961f\u5217\u6709\u5269\u4f59\u7684\u7a7a\u95f4\u3002\u5982\u679c\u8d85\u65f6\uff0c\u4f1a\u629b\u51faQueue.Full\u5f02\u5e38\u3002\u5982\u679cblocked\u4e3aFalse\uff0c\u4f46\u8be5Queue\u5df2\u6ee1\uff0c\u4f1a\u7acb\u5373\u629b\u51faQueue.Full\u5f02\u5e38\u3002\n2 q.get\u65b9\u6cd5\u53ef\u4ee5\u4ece\u961f\u5217\u8bfb\u53d6\u5e76\u4e14\u5220\u9664\u4e00\u4e2a\u5143\u7d20\u3002\u540c\u6837\uff0cget\u65b9\u6cd5\u6709\u4e24\u4e2a\u53ef\u9009\u53c2\u6570\uff1ablocked\u548ctimeout\u3002\u5982\u679cblocked\u4e3aTrue\uff08\u9ed8\u8ba4\u503c\uff09\uff0c\u5e76\u4e14timeout\u4e3a\u6b63\u503c\uff0c\u90a3\u4e48\u5728\u7b49\u5f85\u65f6\u95f4\u5185\u6ca1\u6709\u53d6\u5230\u4efb\u4f55\u5143\u7d20\uff0c\u4f1a\u629b\u51faQueue.Empty\u5f02\u5e38\u3002\u5982\u679cblocked\u4e3aFalse\uff0c\u6709\u4e24\u79cd\u60c5\u51b5\u5b58\u5728\uff0c\u5982\u679cQueue\u6709\u4e00\u4e2a\u503c\u53ef\u7528\uff0c\u5219\u7acb\u5373\u8fd4\u56de\u8be5\u503c\uff0c\u5426\u5219\uff0c\u5982\u679c\u961f\u5217\u4e3a\u7a7a\uff0c\u5219\u7acb\u5373\u629b\u51faQueue.Empty\u5f02\u5e38.\n3  \n4 q.get_nowait():\u540cq.get(False)\n5 q.put_nowait():\u540cq.put(False)\n6 \n7 q.empty():\u8c03\u7528\u6b64\u65b9\u6cd5\u65f6q\u4e3a\u7a7a\u5219\u8fd4\u56deTrue\uff0c\u8be5\u7ed3\u679c\u4e0d\u53ef\u9760\uff0c\u6bd4\u5982\u5728\u8fd4\u56deTrue\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u961f\u5217\u4e2d\u53c8\u52a0\u5165\u4e86\u9879\u76ee\u3002\n8 q.full()\uff1a\u8c03\u7528\u6b64\u65b9\u6cd5\u65f6q\u5df2\u6ee1\u5219\u8fd4\u56deTrue\uff0c\u8be5\u7ed3\u679c\u4e0d\u53ef\u9760\uff0c\u6bd4\u5982\u5728\u8fd4\u56deTrue\u7684\u8fc7\u7a0b\u4e2d\uff0c\u5982\u679c\u961f\u5217\u4e2d\u7684\u9879\u76ee\u88ab\u53d6\u8d70\u3002\n9 q.qsize():\u8fd4\u56de\u961f\u5217\u4e2d\u76ee\u524d\u9879\u76ee\u7684\u6b63\u786e\u6570\u91cf\uff0c\u7ed3\u679c\u4e5f\u4e0d\u53ef\u9760\uff0c\u7406\u7531\u540cq.empty()\u548cq.full()\u4e00\u6837<\/code><\/pre>\n
\u5176\u4ed6\u65b9\u6cd5(\u4e86\u89e3)\uff1a<\/p>\n
1 q.cancel_join_thread():\u4e0d\u4f1a\u5728\u8fdb\u7a0b\u9000\u51fa\u65f6\u81ea\u52a8\u8fde\u63a5\u540e\u53f0\u7ebf\u7a0b\u3002\u53ef\u4ee5\u9632\u6b62join_thread()\u65b9\u6cd5\u963b\u585e\n2 q.close():\u5173\u95ed\u961f\u5217\uff0c\u9632\u6b62\u961f\u5217\u4e2d\u52a0\u5165\u66f4\u591a\u6570\u636e\u3002\u8c03\u7528\u6b64\u65b9\u6cd5\uff0c\u540e\u53f0\u7ebf\u7a0b\u5c06\u7ee7\u7eed\u5199\u5165\u90a3\u4e9b\u5df2\u7ecf\u5165\u961f\u5217\u4f46\u5c1a\u672a\u5199\u5165\u7684\u6570\u636e\uff0c\u4f46\u5c06\u5728\u6b64\u65b9\u6cd5\u5b8c\u6210\u65f6\u9a6c\u4e0a\u5173\u95ed\u3002\u5982\u679cq\u88ab\u5783\u573e\u6536\u96c6\uff0c\u5c06\u8c03\u7528\u6b64\u65b9\u6cd5\u3002\u5173\u95ed\u961f\u5217\u4e0d\u4f1a\u5728\u961f\u5217\u4f7f\u7528\u8005\u4e2d\u4ea7\u751f\u4efb\u4f55\u7c7b\u578b\u7684\u6570\u636e\u7ed3\u675f\u4fe1\u53f7\u6216\u5f02\u5e38\u3002\u4f8b\u5982\uff0c\u5982\u679c\u67d0\u4e2a\u4f7f\u7528\u8005\u6b63\u5728\u88ab\u963b\u585e\u5728get()\u64cd\u4f5c\u4e0a\uff0c\u5173\u95ed\u751f\u4ea7\u8005\u4e2d\u7684\u961f\u5217\u4e0d\u4f1a\u5bfc\u81f4get()\u65b9\u6cd5\u8fd4\u56de\u9519\u8bef\u3002\n3 q.join_thread()\uff1a\u8fde\u63a5\u961f\u5217\u7684\u540e\u53f0\u7ebf\u7a0b\u3002\u6b64\u65b9\u6cd5\u7528\u4e8e\u5728\u8c03\u7528q.close()\u65b9\u6cd5\u4e4b\u540e\uff0c\u7b49\u5f85\u6240\u6709\u961f\u5217\u9879\u88ab\u6d88\u8017\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6b64\u65b9\u6cd5\u7531\u4e0d\u662fq\u7684\u539f\u59cb\u521b\u5efa\u8005\u7684\u6240\u6709\u8fdb\u7a0b\u8c03\u7528\u3002\u8c03\u7528q.cancel_join_thread\u65b9\u6cd5\u53ef\u4ee5\u7981\u6b62\u8fd9\u79cd\u884c\u4e3a<\/code><\/pre>\n
*\u5e94\u7528\uff1a*<\/em><\/strong><\/p>\n
'''\nmultiprocessing\u6a21\u5757\u652f\u6301\u8fdb\u7a0b\u95f4\u901a\u4fe1\u7684\u4e24\u79cd\u4e3b\u8981\u5f62\u5f0f:\u7ba1\u9053\u548c\u961f\u5217\n\u90fd\u662f\u57fa\u4e8e\u6d88\u606f\u4f20\u9012\u5b9e\u73b0\u7684,\u4f46\u662f\u961f\u5217\u63a5\u53e3\n'''\n\nfrom multiprocessing import Process,Queue\nimport time\nq=Queue(3)\n\n#put ,get ,put_nowait,get_nowait,full,empty\nq.put(3)\nq.put(3)\nq.put(3)\nprint(q.full()) #\u6ee1\u4e86\n\nprint(q.get())\nprint(q.get())\nprint(q.get())\nprint(q.empty()) #\u7a7a\u4e86<\/code><\/pre>\n
*\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b*<\/em><\/strong><\/p>\n
\u5728\u5e76\u53d1\u7f16\u7a0b\u4e2d\u4f7f\u7528\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u6a21\u5f0f\u80fd\u591f\u89e3\u51b3\u7edd\u5927\u591a\u6570\u5e76\u53d1\u95ee\u9898\u3002\u8be5\u6a21\u5f0f\u901a\u8fc7\u5e73\u8861\u751f\u4ea7\u7ebf\u7a0b\u548c\u6d88\u8d39\u7ebf\u7a0b\u7684\u5de5\u4f5c\u80fd\u529b\u6765\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6574\u4f53\u5904\u7406\u6570\u636e\u7684\u901f\u5ea6\u3002<\/strong><\/p>\n
*\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u6a21\u5f0f*<\/em><\/strong><\/p>\n
\u5728\u7ebf\u7a0b\u4e16\u754c\u91cc\uff0c\u751f\u4ea7\u8005\u5c31\u662f\u751f\u4ea7\u6570\u636e\u7684\u7ebf\u7a0b\uff0c\u6d88\u8d39\u8005\u5c31\u662f\u6d88\u8d39\u6570\u636e\u7684\u7ebf\u7a0b\u3002\u5728\u591a\u7ebf\u7a0b\u5f00\u53d1\u5f53\u4e2d\uff0c\u5982\u679c\u751f\u4ea7\u8005\u5904\u7406\u901f\u5ea6\u5f88\u5feb\uff0c\u800c\u6d88\u8d39\u8005\u5904\u7406\u901f\u5ea6\u5f88\u6162\uff0c\u90a3\u4e48\u751f\u4ea7\u8005\u5c31\u5fc5\u987b\u7b49\u5f85\u6d88\u8d39\u8005\u5904\u7406\u5b8c\uff0c\u624d\u80fd\u7ee7\u7eed\u751f\u4ea7\u6570\u636e\u3002\u540c\u6837\u7684\u9053\u7406\uff0c\u5982\u679c\u6d88\u8d39\u8005\u7684\u5904\u7406\u80fd\u529b\u5927\u4e8e\u751f\u4ea7\u8005\uff0c\u90a3\u4e48\u6d88\u8d39\u8005\u5c31\u5fc5\u987b\u7b49\u5f85\u751f\u4ea7\u8005\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u4e8e\u662f\u5f15\u5165\u4e86\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u6a21\u5f0f\u3002<\/strong><\/p>\n
*\u4ec0\u4e48\u662f\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u5f0f*<\/em><\/strong><\/p>\n
\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u5f0f\u662f\u901a\u8fc7\u4e00\u4e2a\u5bb9\u5668\u6765\u89e3\u51b3\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u7684\u5f3a\u8026\u5408\u95ee\u9898\u3002\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u5f7c\u6b64\u4e4b\u95f4\u4e0d\u76f4\u63a5\u901a\u8baf\uff0c\u800c\u901a\u8fc7\u963b\u585e\u961f\u5217\u6765\u8fdb\u884c\u901a\u8baf\uff0c\u6240\u4ee5\u751f\u4ea7\u8005\u751f\u4ea7\u5b8c\u6570\u636e\u4e4b\u540e\u4e0d\u7528\u7b49\u5f85\u6d88\u8d39\u8005\u5904\u7406\uff0c\u76f4\u63a5\u6254\u7ed9\u963b\u585e\u961f\u5217\uff0c\u6d88\u8d39\u8005\u4e0d\u627e\u751f\u4ea7\u8005\u8981\u6570\u636e\uff0c\u800c\u662f\u76f4\u63a5\u4ece\u963b\u585e\u961f\u5217\u91cc\u53d6\uff0c\u963b\u585e\u961f\u5217\u5c31\u76f8\u5f53\u4e8e\u4e00\u4e2a\u7f13\u51b2\u533a\uff0c\u5e73\u8861\u4e86\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u7684\u5904\u7406\u80fd\u529b\u3002<\/strong><\/p>\n
\u57fa\u4e8e\u961f\u5217\u5b9e\u73b0\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b<\/strong><\/p>\n
from multiprocessing import Process,Queue\nimport time,random,os\ndef consumer(q):\n    while True:\n        res=q.get()\n        time.sleep(random.randint(1,3))\n        print('\\033[45m%s \u5403 %s\\033[0m' %(os.getpid(),res))\n\ndef producer(q):\n    for i in range(10):\n        time.sleep(random.randint(1,3))\n        res='\u5305\u5b50%s' %i\n        q.put(res)\n        print('\\033[44m%s \u751f\u4ea7\u4e86 %s\\033[0m' %(os.getpid(),res))\n\nif __name__ == '__main__':\n    q=Queue()\n    #\u751f\u4ea7\u8005\u4eec:\u5373\u53a8\u5e08\u4eec\n    p1=Process(target=producer,args=(q,))\n\n    #\u6d88\u8d39\u8005\u4eec:\u5373\u5403\u8d27\u4eec\n    c1=Process(target=consumer,args=(q,))\n\n    #\u5f00\u59cb\n    p1.start()\n    c1.start()\n    print('\u4e3b')<\/code><\/pre>\n
\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b\u603b\u7ed3<\/p>\n
#\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b\u603b\u7ed3\n\n    #\u7a0b\u5e8f\u4e2d\u6709\u4e24\u7c7b\u89d2\u8272\n        \u4e00\u7c7b\u8d1f\u8d23\u751f\u4ea7\u6570\u636e\uff08\u751f\u4ea7\u8005\uff09\n        \u4e00\u7c7b\u8d1f\u8d23\u5904\u7406\u6570\u636e\uff08\u6d88\u8d39\u8005\uff09\n\n    #\u5f15\u5165\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b\u4e3a\u4e86\u89e3\u51b3\u7684\u95ee\u9898\u662f\uff1a\n        \u5e73\u8861\u751f\u4ea7\u8005\u4e0e\u6d88\u8d39\u8005\u4e4b\u95f4\u7684\u5de5\u4f5c\u80fd\u529b\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u6574\u4f53\u5904\u7406\u6570\u636e\u7684\u901f\u5ea6\n\n    #\u5982\u4f55\u5b9e\u73b0\uff1a\n        \u751f\u4ea7\u8005<-->\u961f\u5217<\u2014\u2014>\u6d88\u8d39\u8005\n    #\u751f\u4ea7\u8005\u6d88\u8d39\u8005\u6a21\u578b\u5b9e\u73b0\u7c7b\u7a0b\u5e8f\u7684\u89e3\u8026\u548c<\/code><\/pre>\n
\u6b64\u65f6\u7684\u95ee\u9898\u662f\u4e3b\u8fdb\u7a0b\u6c38\u8fdc\u4e0d\u4f1a\u7ed3\u675f\uff0c\u539f\u56e0\u662f\uff1a\u751f\u4ea7\u8005p\u5728\u751f\u4ea7\u5b8c\u540e\u5c31\u7ed3\u675f\u4e86\uff0c\u4f46\u662f\u6d88\u8d39\u8005c\u5728\u53d6\u7a7a\u4e86q\u4e4b\u540e\uff0c\u5219\u4e00\u76f4\u5904\u4e8e\u6b7b\u5faa\u73af\u4e2d\u4e14\u5361\u5728q.get()\u8fd9\u4e00\u6b65\u3002<\/p>\n
\u89e3\u51b3\u65b9\u5f0f\u65e0\u975e\u662f\u8ba9\u751f\u4ea7\u8005\u5728\u751f\u4ea7\u5b8c\u6bd5\u540e\uff0c\u5f80\u961f\u5217\u4e2d\u518d\u53d1\u4e00\u4e2a\u7ed3\u675f\u4fe1\u53f7\uff0c\u8fd9\u6837\u6d88\u8d39\u8005\u5728\u63a5\u6536\u5230\u7ed3\u675f\u4fe1\u53f7\u540e\u5c31\u53ef\u4ee5break\u51fa\u6b7b\u5faa\u73af<\/p>\n
\u751f\u4ea7\u8005\u5728\u751f\u4ea7\u5b8c\u6bd5\u540e\u53d1\u9001\u7ed3\u675f\u4fe1\u53f7None<\/p>\n
from multiprocessing import Process,Queue\nimport time,random,os\ndef consumer(q):\n    while True:\n        res=q.get()\n        if res is None:break  # \u6536\u5230\u7ed3\u675f\u4fe1\u53f7\u5219\u7ed3\u675f\n        time.sleep(random.randint(1,3))\n        print('\\033[45m%s \u5403 %s\\033[0m' %(os.getpid(),res))\n\ndef producer(q):\n    for i in range(10):\n        time.sleep(random.randint(1,3))\n        res='\u5305\u5b50%s' %i\n        q.put(res)\n        print('\\033[44m%s \u751f\u4ea7\u4e86 %s\\033[0m' %(os.getpid(),res))\n    q.put(None)  # \u53d1\u9001\u7ed3\u675f\u4fe1\u53f7\nif __name__ == '__main__':\n    q=Queue()\n    #\u751f\u4ea7\u8005\u4eec:\u5373\u53a8\u5e08\u4eec\n    p1=Process(target=producer,args=(q,))\n\n    #\u6d88\u8d39\u8005\u4eec:\u5373\u5403\u8d27\u4eec\n    c1=Process(target=consumer,args=(q,))\n\n    #\u5f00\u59cb\n    p1.start()\n    c1.start()\n    print('\u4e3b')<\/code><\/pre>\n
\u6ce8\u610f\uff1a\u7ed3\u675f\u4fe1\u53f7None\uff0c\u4e0d\u4e00\u5b9a\u8981\u7531\u751f\u4ea7\u8005\u53d1\uff0c\u4e3b\u8fdb\u7a0b\u91cc\u540c\u6837\u53ef\u4ee5\u53d1\uff0c\u4f46\u4e3b\u8fdb\u7a0b\u9700\u8981\u7b49\u751f\u4ea7\u8005\u7ed3\u675f\u540e\u624d\u5e94\u8be5\u53d1\u9001\u8be5\u4fe1\u53f7<\/p>\n
\u4e3b\u8fdb\u7a0b\u5728\u751f\u4ea7\u8005\u751f\u4ea7\u5b8c\u6bd5\u540e\u53d1\u9001\u7ed3\u675f\u4fe1\u53f7None<\/p>\n
from multiprocessing import Process,Queue\nimport time,random,os\ndef consumer(q):\n    while True:\n        res=q.get()\n        if res is None:break #\u6536\u5230\u7ed3\u675f\u4fe1\u53f7\u5219\u7ed3\u675f\n        time.sleep(random.randint(1,3))\n        print('\\033[45m%s \u5403 %s\\033[0m' %(os.getpid(),res))\n\ndef producer(q):\n    for i in range(2):\n        time.sleep(random.randint(1,3))\n        res='\u5305\u5b50%s' %i\n        q.put(res)\n        print('\\033[44m%s \u751f\u4ea7\u4e86 %s\\033[0m' %(os.getpid(),res))\n\nif __name__ == '__main__':\n    q=Queue()\n    #\u751f\u4ea7\u8005\u4eec:\u5373\u53a8\u5e08\u4eec\n    p1=Process(target=producer,args=(q,))\n\n    #\u6d88\u8d39\u8005\u4eec:\u5373\u5403\u8d27\u4eec\n    c1=Process(target=consumer,args=(q,))\n\n    #\u5f00\u59cb\n    p1.start()\n    c1.start()\n\n    p1.join()\n    q.put(None) #\u53d1\u9001\u7ed3\u675f\u4fe1\u53f7\n    print('\u4e3b')<\/code><\/pre>\n
\u4f46\u4e0a\u8ff0\u89e3\u51b3\u65b9\u5f0f\uff0c\u5728\u6709\u591a\u4e2a\u751f\u4ea7\u8005\u548c\u591a\u4e2a\u6d88\u8d39\u8005\u65f6\uff0c\u6211\u4eec\u5219\u9700\u8981\u7528\u4e00\u4e2a\u5f88low\u7684\u65b9\u5f0f\u53bb\u89e3\u51b3<\/p>\n
\u6709\u51e0\u4e2a\u6d88\u8d39\u8005\u5c31\u9700\u8981\u53d1\u9001\u51e0\u6b21\u7ed3\u675f\u4fe1\u53f7\uff1a\u76f8\u5f53low<\/p>\n
from multiprocessing import Process,Queue\nimport time,random,os\ndef consumer(q):\n    while True:\n        res=q.get()\n        if res is None:break  # \u6536\u5230\u7ed3\u675f\u4fe1\u53f7\u5219\u7ed3\u675f\n        time.sleep(random.randint(1,3))\n        print('\\033[45m %s \u5403 %s \\033[0m' %(os.getpid(),res))\n\ndef producer(name,q):\n    for i in range(2):\n        time.sleep(random.randint(1,3))\n        res='%s%s' %(name,i)\n        q.put(res)\n        print('\\033[44m %s \u751f\u4ea7\u4e86 %s\\033[0m' %(os.getpid(),res))\n\nif __name__ == '__main__':\n    q=Queue()\n    #\u751f\u4ea7\u8005\u4eec:\u5373\u53a8\u5e08\u4eec\n    p1=Process(target=producer,args=('\u5305\u5b50',q))\n    p2=Process(target=producer,args=('\u8c46\u8150',q))\n    p3=Process(target=producer,args=('\u6cb9\u6761',q))\n\n    #\u6d88\u8d39\u8005\u4eec:\u5373\u5403\u8d27\u4eec\n    c1=Process(target=consumer,args=(q,))\n    c2=Process(target=consumer,args=(q,))\n\n    #\u5f00\u59cb\n    p1.start()\n    p2.start()\n    p3.start()\n    c1.start()\n\n    p1.join() #\u5fc5\u987b\u4fdd\u8bc1\u751f\u4ea7\u8005\u5168\u90e8\u751f\u4ea7\u5b8c\u6bd5,\u624d\u5e94\u8be5\u53d1\u9001\u7ed3\u675f\u4fe1\u53f7\n    p2.join()\n    p3.join()\n    q.put(None) #\u6709\u51e0\u4e2a\u6d88\u8d39\u8005\u5c31\u5e94\u8be5\u53d1\u9001\u51e0\u6b21\u7ed3\u675f\u4fe1\u53f7None\n    q.put(None) #\u53d1\u9001\u7ed3\u675f\u4fe1\u53f7\n    print('\u4e3b')<\/code><\/pre>\n
\u5176\u5b9e\u6211\u4eec\u7684\u601d\u8def\u65e0\u975e\u662f\u53d1\u9001\u7ed3\u675f\u4fe1\u53f7\u800c\u5df2\uff0c\u6709\u53e6\u5916\u4e00\u79cd\u961f\u5217\u63d0\u4f9b\u4e86\u8fd9\u79cd\u673a\u5236<\/p>\n
#JoinableQueue([maxsize])\uff1a\u8fd9\u5c31\u50cf\u662f\u4e00\u4e2aQueue\u5bf9\u8c61\uff0c\u4f46\u961f\u5217\u5141\u8bb8\u9879\u76ee\u7684\u4f7f\u7528\u8005\u901a\u77e5\u751f\u6210\u8005\u9879\u76ee\u5df2\u7ecf\u88ab\u6210\u529f\u5904\u7406\u3002\u901a\u77e5\u8fdb\u7a0b\u662f\u4f7f\u7528\u5171\u4eab\u7684\u4fe1\u53f7\u548c\u6761\u4ef6\u53d8\u91cf\u6765\u5b9e\u73b0\u7684\u3002\n\n   #\u53c2\u6570\u4ecb\u7ecd\uff1a\n    maxsize\u662f\u961f\u5217\u4e2d\u5141\u8bb8\u6700\u5927\u9879\u6570\uff0c\u7701\u7565\u5219\u65e0\u5927\u5c0f\u9650\u5236\u3002    \n\u3000 #\u65b9\u6cd5\u4ecb\u7ecd\uff1a\n    JoinableQueue\u7684\u5b9e\u4f8bp\u9664\u4e86\u4e0eQueue\u5bf9\u8c61\u76f8\u540c\u7684\u65b9\u6cd5\u4e4b\u5916\u8fd8\u5177\u6709\uff1a\n    q.task_done()\uff1a\u4f7f\u7528\u8005\u4f7f\u7528\u6b64\u65b9\u6cd5\u53d1\u51fa\u4fe1\u53f7\uff0c\u8868\u793aq.get()\u7684\u8fd4\u56de\u9879\u76ee\u5df2\u7ecf\u88ab\u5904\u7406\u3002\u5982\u679c\u8c03\u7528\u6b64\u65b9\u6cd5\u7684\u6b21\u6570\u5927\u4e8e\u4ece\u961f\u5217\u4e2d\u5220\u9664\u9879\u76ee\u7684\u6570\u91cf\uff0c\u5c06\u5f15\u53d1ValueError\u5f02\u5e38\n    q.join():\u751f\u4ea7\u8005\u8c03\u7528\u6b64\u65b9\u6cd5\u8fdb\u884c\u963b\u585e\uff0c\u76f4\u5230\u961f\u5217\u4e2d\u6240\u6709\u7684\u9879\u76ee\u5747\u88ab\u5904\u7406\u3002\u963b\u585e\u5c06\u6301\u7eed\u5230\u961f\u5217\u4e2d\u7684\u6bcf\u4e2a\u9879\u76ee\u5747\u8c03\u7528q.task_done\uff08\uff09\u65b9\u6cd5\u4e3a\u6b62\nfrom multiprocessing import Process,JoinableQueue\nimport time,random,os\ndef consumer(q):\n    while True:\n        res=q.get()\n        time.sleep(random.randint(1,3))\n        print('\\033[45m%s \u5403 %s\\033[0m' %(os.getpid(),res))\n\n        q.task_done() #\u5411q.join()\u53d1\u9001\u4e00\u6b21\u4fe1\u53f7,\u8bc1\u660e\u4e00\u4e2a\u6570\u636e\u5df2\u7ecf\u88ab\u53d6\u8d70\u4e86\n\ndef producer(name,q):\n    for i in range(10):\n        time.sleep(random.randint(1,3))\n        res='%s%s' %(name,i)\n        q.put(res)\n        print('\\033[44m%s \u751f\u4ea7\u4e86 %s\\033[0m' %(os.getpid(),res))\n    q.join()\n\nif __name__ == '__main__':\n    q=JoinableQueue()\n    #\u751f\u4ea7\u8005\u4eec:\u5373\u53a8\u5e08\u4eec\n    p1=Process(target=producer,args=('\u5305\u5b50',q))\n    p2=Process(target=producer,args=('\u8c46\u8150',q))\n    p3=Process(target=producer,args=('\u6cb9\u6761',q))\n\n    #\u6d88\u8d39\u8005\u4eec:\u5373\u5403\u8d27\u4eec\n    c1=Process(target=consumer,args=(q,))\n    c2=Process(target=consumer,args=(q,))\n    c1.daemon=True\n    c2.daemon=True\n\n    #\u5f00\u59cb\n    p_l=[p1,p2,p3,c1,c2]\n    for p in p_l:\n        p.start()\n\n    p1.join()\n    p2.join()\n    p3.join()\n    print('\u4e3b') \n\n    # \u4e3b\u8fdb\u7a0b\u7b49--->p1,p2,p3\u7b49---->c1,c2\n    # p1,p2,p3\u7ed3\u675f\u4e86,\u8bc1\u660ec1,c2\u80af\u5b9a\u5168\u90fd\u6536\u5b8c\u4e86p1,p2,p3\u53d1\u5230\u961f\u5217\u7684\u6570\u636e\n    # \u56e0\u800cc1,c2\u4e5f\u6ca1\u6709\u5b58\u5728\u7684\u4ef7\u503c\u4e86,\u5e94\u8be5\u968f\u7740\u4e3b\u8fdb\u7a0b\u7684\u7ed3\u675f\u800c\u7ed3\u675f,\u6240\u4ee5\u8bbe\u7f6e\u6210\u5b88\u62a4\u8fdb\u7a0b<\/code><\/pre>\n
\u4e03\u3001\u7ba1\u9053<\/h2>\n
\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff08IPC\uff09\u65b9\u5f0f\u4e8c\uff1a\u7ba1\u9053\uff08\u4e0d\u63a8\u8350\u4f7f\u7528\uff0c\u4e86\u89e3\u5373\u53ef\uff09<\/p>\n
\u4ecb\u7ecd<\/p>\n
#\u521b\u5efa\u7ba1\u9053\u7684\u7c7b\uff1a\nPipe([duplex]):\u5728\u8fdb\u7a0b\u4e4b\u95f4\u521b\u5efa\u4e00\u6761\u7ba1\u9053\uff0c\u5e76\u8fd4\u56de\u5143\u7ec4\uff08conn1,conn2\uff09,\u5176\u4e2dconn1\uff0cconn2\u8868\u793a\u7ba1\u9053\u4e24\u7aef\u7684\u8fde\u63a5\u5bf9\u8c61\uff0c\u5f3a\u8c03\u4e00\u70b9\uff1a\u5fc5\u987b\u5728\u4ea7\u751fProcess\u5bf9\u8c61\u4e4b\u524d\u4ea7\u751f\u7ba1\u9053\n#\u53c2\u6570\u4ecb\u7ecd\uff1a\ndumplex:\u9ed8\u8ba4\u7ba1\u9053\u662f\u5168\u53cc\u5de5\u7684\uff0c\u5982\u679c\u5c06duplex\u5c04\u6210False\uff0cconn1\u53ea\u80fd\u7528\u4e8e\u63a5\u6536\uff0cconn2\u53ea\u80fd\u7528\u4e8e\u53d1\u9001\u3002\n#\u4e3b\u8981\u65b9\u6cd5\uff1a\n    conn1.recv():\u63a5\u6536conn2.send(obj)\u53d1\u9001\u7684\u5bf9\u8c61\u3002\u5982\u679c\u6ca1\u6709\u6d88\u606f\u53ef\u63a5\u6536\uff0crecv\u65b9\u6cd5\u4f1a\u4e00\u76f4\u963b\u585e\u3002\u5982\u679c\u8fde\u63a5\u7684\u53e6\u5916\u4e00\u7aef\u5df2\u7ecf\u5173\u95ed\uff0c\u90a3\u4e48recv\u65b9\u6cd5\u4f1a\u629b\u51faEOFError\u3002\n    conn1.send(obj):\u901a\u8fc7\u8fde\u63a5\u53d1\u9001\u5bf9\u8c61\u3002obj\u662f\u4e0e\u5e8f\u5217\u5316\u517c\u5bb9\u7684\u4efb\u610f\u5bf9\u8c61\n #\u5176\u4ed6\u65b9\u6cd5\uff1a\nconn1.close():\u5173\u95ed\u8fde\u63a5\u3002\u5982\u679cconn1\u88ab\u5783\u573e\u56de\u6536\uff0c\u5c06\u81ea\u52a8\u8c03\u7528\u6b64\u65b9\u6cd5\nconn1.fileno():\u8fd4\u56de\u8fde\u63a5\u4f7f\u7528\u7684\u6574\u6570\u6587\u4ef6\u63cf\u8ff0\u7b26\nconn1.poll([timeout]):\u5982\u679c\u8fde\u63a5\u4e0a\u7684\u6570\u636e\u53ef\u7528\uff0c\u8fd4\u56deTrue\u3002timeout\u6307\u5b9a\u7b49\u5f85\u7684\u6700\u957f\u65f6\u9650\u3002\u5982\u679c\u7701\u7565\u6b64\u53c2\u6570\uff0c\u65b9\u6cd5\u5c06\u7acb\u5373\u8fd4\u56de\u7ed3\u679c\u3002\u5982\u679c\u5c06timeout\u5c04\u6210None\uff0c\u64cd\u4f5c\u5c06\u65e0\u9650\u671f\u5730\u7b49\u5f85\u6570\u636e\u5230\u8fbe\u3002\n\nconn1.recv_bytes([maxlength]):\u63a5\u6536c.send_bytes()\u65b9\u6cd5\u53d1\u9001\u7684\u4e00\u6761\u5b8c\u6574\u7684\u5b57\u8282\u6d88\u606f\u3002maxlength\u6307\u5b9a\u8981\u63a5\u6536\u7684\u6700\u5927\u5b57\u8282\u6570\u3002\u5982\u679c\u8fdb\u5165\u7684\u6d88\u606f\uff0c\u8d85\u8fc7\u4e86\u8fd9\u4e2a\u6700\u5927\u503c\uff0c\u5c06\u5f15\u53d1IOError\u5f02\u5e38\uff0c\u5e76\u4e14\u5728\u8fde\u63a5\u4e0a\u65e0\u6cd5\u8fdb\u884c\u8fdb\u4e00\u6b65\u8bfb\u53d6\u3002\u5982\u679c\u8fde\u63a5\u7684\u53e6\u5916\u4e00\u7aef\u5df2\u7ecf\u5173\u95ed\uff0c\u518d\u4e5f\u4e0d\u5b58\u5728\u4efb\u4f55\u6570\u636e\uff0c\u5c06\u5f15\u53d1EOFError\u5f02\u5e38\u3002\nconn.send_bytes(buffer [, offset [, size]])\uff1a\u901a\u8fc7\u8fde\u63a5\u53d1\u9001\u5b57\u8282\u6570\u636e\u7f13\u51b2\u533a\uff0cbuffer\u662f\u652f\u6301\u7f13\u51b2\u533a\u63a5\u53e3\u7684\u4efb\u610f\u5bf9\u8c61\uff0coffset\u662f\u7f13\u51b2\u533a\u4e2d\u7684\u5b57\u8282\u504f\u79fb\u91cf\uff0c\u800csize\u662f\u8981\u53d1\u9001\u5b57\u8282\u6570\u3002\u7ed3\u679c\u6570\u636e\u4ee5\u5355\u6761\u6d88\u606f\u7684\u5f62\u5f0f\u53d1\u51fa\uff0c\u7136\u540e\u8c03\u7528c.recv_bytes()\u51fd\u6570\u8fdb\u884c\u63a5\u6536    \n\nconn1.recv_bytes_into(buffer [, offset]):\u63a5\u6536\u4e00\u6761\u5b8c\u6574\u7684\u5b57\u8282\u6d88\u606f\uff0c\u5e76\u628a\u5b83\u4fdd\u5b58\u5728buffer\u5bf9\u8c61\u4e2d\uff0c\u8be5\u5bf9\u8c61\u652f\u6301\u53ef\u5199\u5165\u7684\u7f13\u51b2\u533a\u63a5\u53e3\uff08\u5373bytearray\u5bf9\u8c61\u6216\u7c7b\u4f3c\u7684\u5bf9\u8c61\uff09\u3002offset\u6307\u5b9a\u7f13\u51b2\u533a\u4e2d\u653e\u7f6e\u6d88\u606f\u5904\u7684\u5b57\u8282\u4f4d\u79fb\u3002\u8fd4\u56de\u503c\u662f\u6536\u5230\u7684\u5b57\u8282\u6570\u3002\u5982\u679c\u6d88\u606f\u957f\u5ea6\u5927\u4e8e\u53ef\u7528\u7684\u7f13\u51b2\u533a\u7a7a\u95f4\uff0c\u5c06\u5f15\u53d1BufferTooShort\u5f02\u5e38\u3002\n\u57fa\u4e8e\u7ba1\u9053\u5b9e\u73b0\u8fdb\u7a0b\u95f4\u901a\u4fe1\uff08\u4e0e\u961f\u5217\u7684\u65b9\u5f0f\u662f\u7c7b\u4f3c\u7684\uff0c\u961f\u5217\u5c31\u662f\u7ba1\u9053\u52a0\u9501\u5b9e\u73b0\u7684\uff09\nfrom multiprocessing import Process,Pipe\n\nimport time,os\ndef consumer(p,name):\n    left,right=p\n    left.close()\n    while True:\n        try:\n            baozi=right.recv()\n            print('%s \u6536\u5230\u5305\u5b50:%s' %(name,baozi))\n        except EOFError:\n            right.close()\n            break\ndef producer(seq,p):\n    left,right=p\n    right.close()\n    for i in seq:\n        left.send(i)\n        # time.sleep(1)\n    else:\n        left.close()\nif __name__ == '__main__':\n    left,right=Pipe()\n    c1=Process(target=consumer,args=((left,right),'c1'))\n    c1.start()\n    seq=(i for i in range(10))\n    producer(seq,(left,right))\n    right.close()\n    left.close()\n    c1.join()\n    print('\u4e3b\u8fdb\u7a0b')<\/code><\/pre>\n
*\u6ce8\u610f\uff1a\u751f\u4ea7\u8005\u548c\u6d88\u8d39\u8005\u90fd\u6ca1\u6709\u4f7f\u7528\u7ba1\u9053\u7684\u67d0\u4e2a\u7aef\u70b9\uff0c\u5c31\u5e94\u8be5\u5c06\u5176\u5173\u95ed\uff0c\u5982\u5728\u751f\u4ea7\u8005\u4e2d\u5173\u95ed\u7ba1\u9053\u7684\u53f3\u7aef\uff0c\u5728\u6d88\u8d39\u8005\u4e2d\u5173\u95ed\u7ba1\u9053\u7684\u5de6\u7aef\u3002\u5982\u679c\u5fd8\u8bb0\u6267\u884c\u8fd9\u4e9b\u6b65\u9aa4\uff0c\u7a0b\u5e8f\u53ef\u80fd\u518d\u6d88\u8d39\u8005\u4e2d\u7684recv\\<\/em>*****<\/strong>*()**<\/em>*\\<\/em>\u64cd\u4f5c\u4e0a\u6302\u8d77\u3002\u7ba1\u9053\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u8fdb\u884c\u5f15\u7528\u8ba1\u6570\u7684,\u5fc5\u987b\u5728\u6240\u6709\u8fdb\u7a0b\u4e2d\u5173\u95ed\u7ba1\u9053\u540e\u624d\u80fd\u751f\u4ea7EOFError\u5f02\u5e38\u3002\u56e0\u6b64\u5728\u751f\u4ea7\u8005\u4e2d\u5173\u95ed\u7ba1\u9053\u4e0d\u4f1a\u6709\u4efb\u4f55\u6548\u679c\uff0c\u4ed8\u8d39\u6d88\u8d39\u8005\u4e2d\u4e5f\u5173\u95ed\u4e86\u76f8\u540c\u7684\u7ba1\u9053\u7aef\u70b9\u3002\\<\/strong><\/strong><\/p>\n
\u7ba1\u9053\u53ef\u4ee5\u7528\u4e8e\u53cc\u5411\u901a\u4fe1\uff0c\u5229\u7528\u901a\u5e38\u5728\u5ba2\u6237\u7aef\/\u670d\u52a1\u5668\u4e2d\u4f7f\u7528\u7684\u8bf7\u6c42\uff0f\u54cd\u5e94\u6a21\u578b\u6216\u8fdc\u7a0b\u8fc7\u7a0b\u8c03\u7528\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u7ba1\u9053\u7f16\u5199\u4e0e\u8fdb\u7a0b\u4ea4\u4e92\u7684\u7a0b\u5e8f<\/p>\n
from multiprocessing import Process,Pipe\n\nimport time,os\ndef adder(p,name):\n    server,client=p\n    client.close()\n    while True:\n        try:\n            x,y=server.recv()\n        except EOFError:\n            server.close()\n            break\n        res=x+y\n        server.send(res)\n    print('server done')\nif __name__ == '__main__':\n    server,client=Pipe()\n\n    c1=Process(target=adder,args=((server,client),'c1'))\n    c1.start()\n\n    server.close()\n\n    client.send((10,20))\n    print(client.recv())\n    client.close()\n\n    c1.join()\n    print('\u4e3b\u8fdb\u7a0b')\n#\u6ce8\u610f\uff1asend()\u548crecv()\u65b9\u6cd5\u4f7f\u7528pickle\u6a21\u5757\u5bf9\u5bf9\u8c61\u8fdb\u884c\u5e8f\u5217\u5316\u3002<\/code><\/pre>\n
\u516b\u3001\u5171\u4eab\u6570\u636e<\/h2>\n
\u5c55\u671b\u672a\u6765\uff0c\u57fa\u4e8e\u6d88\u606f\u4f20\u9012\u7684\u5e76\u53d1\u7f16\u7a0b\u662f\u5927\u52bf\u6240\u8d8b<\/p>\n
\u5373\u4fbf\u662f\u4f7f\u7528\u7ebf\u7a0b\uff0c\u63a8\u8350\u505a\u6cd5\u4e5f\u662f\u5c06\u7a0b\u5e8f\u8bbe\u8ba1\u4e3a\u5927\u91cf\u72ec\u7acb\u7684\u7ebf\u7a0b\u96c6\u5408<\/p>\n
\u901a\u8fc7\u6d88\u606f\u961f\u5217\u4ea4\u6362\u6570\u636e\u3002\u8fd9\u6837\u6781\u5927\u5730\u51cf\u5c11\u4e86\u5bf9\u4f7f\u7528\u9501\u5b9a\u548c\u5176\u4ed6\u540c\u6b65\u624b\u6bb5\u7684\u9700\u6c42\uff0c<\/p>\n
\u8fd8\u53ef\u4ee5\u6269\u5c55\u5230\u5206\u5e03\u5f0f\u7cfb\u7edf\u4e2d<\/p>\n
*\u8fdb\u7a0b\u95f4\u901a\u4fe1\u5e94\u8be5\u5c3d\u91cf\u907f\u514d\u4f7f\u7528\u672c\u8282\u6240\u8bb2\u7684\u5171\u4eab\u6570\u636e\u7684\u65b9\u5f0f*<\/em><\/strong><\/p>\n
\u8fdb\u7a0b\u95f4\u6570\u636e\u662f\u72ec\u7acb\u7684\uff0c\u53ef\u4ee5\u501f\u52a9\u4e8e\u961f\u5217\u6216\u7ba1\u9053\u5b9e\u73b0\u901a\u4fe1\uff0c\u4e8c\u8005\u90fd\u662f\u57fa\u4e8e\u6d88\u606f\u4f20\u9012\u7684\n\n\u867d\u7136\u8fdb\u7a0b\u95f4\u6570\u636e\u72ec\u7acb\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7Manager\u5b9e\u73b0\u6570\u636e\u5171\u4eab\uff0c\u4e8b\u5b9e\u4e0aManager\u7684\u529f\u80fd\u8fdc\u4e0d\u6b62\u4e8e\u6b64\n\nA manager object returned by Manager() controls a server process which holds Python objects and allows other processes to manipulate them using proxies.\n\nA manager returned by Manager() will support types list, dict, Namespace, Lock, RLock, Semaphore, BoundedSemaphore, Condition, Event, Barrier, Queue, Value and Array. For example,<\/code><\/pre>\n
\u8fdb\u7a0b\u4e4b\u95f4\u64cd\u4f5c\u5171\u4eab\u7684\u6570\u636e<\/p>\n
from multiprocessing import Manager,Process,Lock\nimport os\ndef work(d,lock):\n    # with lock: #\u4e0d\u52a0\u9501\u800c\u64cd\u4f5c\u5171\u4eab\u7684\u6570\u636e,\u80af\u5b9a\u4f1a\u51fa\u73b0\u6570\u636e\u9519\u4e71\n        d['count']-=1\n\nif __name__ == '__main__':\n    lock=Lock()\n    with Manager() as m:\n        dic=m.dict({'count':100})\n        p_l=[]\n        for i in range(100):\n            p=Process(target=work,args=(dic,lock))\n            p_l.append(p)\n            p.start()\n        for p in p_l:\n            p.join()\n        print(dic)\n        #{'count': 94}<\/code><\/pre>\n
\u4e5d\u3001\u4fe1\u53f7\u91cf(\u4e86\u89e3\uff09<\/h2>\n
\u4fe1\u53f7\u91cfSemahpore\uff08\u540c\u7ebf\u7a0b\u4e00\u6837\uff09<\/p>\n
\u4e92\u65a5\u9501 \u540c\u65f6\u53ea\u5141\u8bb8\u4e00\u4e2a\u7ebf\u7a0b\u66f4\u6539\u6570\u636e\uff0c\u800cSemaphore\u662f\u540c\u65f6\u5141\u8bb8\u4e00\u5b9a\u6570\u91cf\u7684\u7ebf\u7a0b\u66f4\u6539\u6570\u636e \uff0c\u6bd4\u5982\u5395\u6240\u67093\u4e2a\u5751\uff0c\u90a3\u6700\u591a\u53ea\u5141\u8bb83\u4e2a\u4eba\u4e0a\u5395\u6240\uff0c\u540e\u9762\u7684\u4eba\u53ea\u80fd\u7b49\u91cc\u9762\u6709\u4eba\u51fa\u6765\u4e86\u624d\u80fd\u518d\u8fdb\u53bb\uff0c\u5982\u679c\u6307\u5b9a\u4fe1\u53f7\u91cf\u4e3a3\uff0c\u90a3\u4e48\u6765\u4e00\u4e2a\u4eba\u83b7\u5f97\u4e00\u628a\u9501\uff0c\u8ba1\u6570\u52a01\uff0c\u5f53\u8ba1\u6570\u7b49\u4e8e3\u65f6\uff0c\u540e\u9762\u7684\u4eba\u5747\u9700\u8981\u7b49\u5f85\u3002\u4e00\u65e6\u91ca\u653e\uff0c\u5c31\u6709\u4eba\u53ef\u4ee5\u83b7\u5f97\u4e00\u628a\u9501\n\n    \u4fe1\u53f7\u91cf\u4e0e\u8fdb\u7a0b\u6c60\u7684\u6982\u5ff5\u5f88\u50cf\uff0c\u4f46\u662f\u8981\u533a\u5206\u5f00\uff0c\u4fe1\u53f7\u91cf\u6d89\u53ca\u5230\u52a0\u9501\u7684\u6982\u5ff5\n\nfrom multiprocessing import Process,Semaphore\nimport time,random\n\ndef go_wc(sem,user):\n    sem.acquire()\n    print('%s \u5360\u5230\u4e00\u4e2a\u8305\u5751' %user)\n    time.sleep(random.randint(0,3)) #\u6a21\u62df\u6bcf\u4e2a\u4eba\u62c9\u5c4e\u901f\u5ea6\u4e0d\u4e00\u6837\uff0c0\u4ee3\u8868\u6709\u7684\u4eba\u8e72\u4e0b\u5c31\u8d77\u6765\u4e86\n    sem.release()\n\nif __name__ == '__main__':\n    sem=Semaphore(5)\n    p_l=[]\n    for i in range(13):\n        p=Process(target=go_wc,args=(sem,'user%s' %i,))\n        p.start()\n        p_l.append(p)\n\n    for i in p_l:\n        i.join()\n    print('============\u300b')<\/code><\/pre>\n
\u5341\u3001\u4e8b\u4ef6(\u4e86\u89e3)<\/h2>\n
Event\uff08\u540c\u7ebf\u7a0b\u4e00\u6837\uff09<\/p>\n
python\u7ebf\u7a0b\u7684\u4e8b\u4ef6\u7528\u4e8e\u4e3b\u7ebf\u7a0b\u63a7\u5236\u5176\u4ed6\u7ebf\u7a0b\u7684\u6267\u884c\uff0c\u4e8b\u4ef6\u4e3b\u8981\u63d0\u4f9b\u4e86\u4e09\u4e2a\u65b9\u6cd5 set\u3001wait\u3001clear\u3002\n\n    \u4e8b\u4ef6\u5904\u7406\u7684\u673a\u5236\uff1a\u5168\u5c40\u5b9a\u4e49\u4e86\u4e00\u4e2a\u201cFlag\u201d\uff0c\u5982\u679c\u201cFlag\u201d\u503c\u4e3a False\uff0c\u90a3\u4e48\u5f53\u7a0b\u5e8f\u6267\u884c event.wait \u65b9\u6cd5\u65f6\u5c31\u4f1a\u963b\u585e\uff0c\u5982\u679c\u201cFlag\u201d\u503c\u4e3aTrue\uff0c\u90a3\u4e48event.wait \u65b9\u6cd5\u65f6\u4fbf\u4e0d\u518d\u963b\u585e\u3002\n\nclear\uff1a\u5c06\u201cFlag\u201d\u8bbe\u7f6e\u4e3aFalse\nset\uff1a\u5c06\u201cFlag\u201d\u8bbe\u7f6e\u4e3aTrue\n\n#_*_coding:utf-8_*_\n#!\/usr\/bin\/env python\n\nfrom multiprocessing import Process,Event\nimport time,random\n\ndef car(e,n):\n    while True:\n        if not e.is_set(): #Flase\n            print('\\033[31m\u7ea2\u706f\u4eae\\033[0m\uff0ccar%s\u7b49\u7740' %n)\n            e.wait()\n            print('\\033[32m\u8f66%s \u770b\u89c1\u7eff\u706f\u4eae\u4e86\\033[0m' %n)\n            time.sleep(random.randint(3,6))\n            if not e.is_set():\n                continue\n            print('\u8d70\u4f60,car', n)\n            break\n\ndef police_car(e,n):\n    while True:\n        if not e.is_set():\n            print('\\033[31m\u7ea2\u706f\u4eae\\033[0m\uff0ccar%s\u7b49\u7740' % n)\n            e.wait(1)\n            print('\u706f\u7684\u662f%s\uff0c\u8b66\u8f66\u8d70\u4e86,car %s' %(e.is_set(),n))\n            break\n\ndef traffic_lights(e,inverval):\n    while True:\n        time.sleep(inverval)\n        if e.is_set():\n            e.clear() #e.is_set() ---->False\n        else:\n            e.set()\n\nif __name__ == '__main__':\n    e=Event()\n    # for i in range(10):\n    #     p=Process(target=car,args=(e,i,))\n    #     p.start()\n\n    for i in range(5):\n        p = Process(target=police_car, args=(e, i,))\n        p.start()\n    t=Process(target=traffic_lights,args=(e,10))\n    t.start()\n\n    print('============\u300b')<\/code><\/pre>\n
\u5341\u4e00\u3001\u8fdb\u7a0b\u6c60<\/h2>\n
\u5728\u5229\u7528Python\u8fdb\u884c\u7cfb\u7edf\u7ba1\u7406\u7684\u65f6\u5019\uff0c\u7279\u522b\u662f\u540c\u65f6\u64cd\u4f5c\u591a\u4e2a\u6587\u4ef6\u76ee\u5f55\uff0c\u6216\u8005\u8fdc\u7a0b\u63a7\u5236\u591a\u53f0\u4e3b\u673a\uff0c\u5e76\u884c\u64cd\u4f5c\u53ef\u4ee5\u8282\u7ea6\u5927\u91cf\u7684\u65f6\u95f4\u3002\u591a\u8fdb\u7a0b\u662f\u5b9e\u73b0\u5e76\u53d1\u7684\u624b\u6bb5\u4e4b\u4e00\uff0c\u9700\u8981\u6ce8\u610f\u7684\u95ee\u9898\u662f\uff1a<\/p>\n
\u5f88\u660e\u663e\u9700\u8981\u5e76\u53d1\u6267\u884c\u7684\u4efb\u52a1\u901a\u5e38\u8981\u8fdc\u5927\u4e8e\u6838\u6570<\/p>\n
\u4e00\u4e2a\u64cd\u4f5c\u7cfb\u7edf\u4e0d\u53ef\u80fd\u65e0\u9650\u5f00\u542f\u8fdb\u7a0b\uff0c\u901a\u5e38\u6709\u51e0\u4e2a\u6838\u5c31\u5f00\u51e0\u4e2a\u8fdb\u7a0b<\/p>\n
\u8fdb\u7a0b\u5f00\u542f\u8fc7\u591a\uff0c\u6548\u7387\u53cd\u800c\u4f1a\u4e0b\u964d\uff08\u5f00\u542f\u8fdb\u7a0b\u662f\u9700\u8981\u5360\u7528\u7cfb\u7edf\u8d44\u6e90\u7684\uff0c\u800c\u4e14\u5f00\u542f\u591a\u4f59\u6838\u6570\u76ee\u7684\u8fdb\u7a0b\u4e5f\u65e0\u6cd5\u505a\u5230\u5e76\u884c\uff09<\/p>\n
\u4f8b\u5982\u5f53\u88ab\u64cd\u4f5c\u5bf9\u8c61\u6570\u76ee\u4e0d\u5927\u65f6\uff0c\u53ef\u4ee5\u76f4\u63a5\u5229\u7528multiprocessing\u4e2d\u7684Process\u52a8\u6001\u6210\u751f\u591a\u4e2a\u8fdb\u7a0b\uff0c\u5341\u51e0\u4e2a\u8fd8\u597d\uff0c\u4f46\u5982\u679c\u662f\u4e0a\u767e\u4e2a\uff0c\u4e0a\u5343\u4e2a\u3002\u3002\u3002\u624b\u52a8\u7684\u53bb\u9650\u5236\u8fdb\u7a0b\u6570\u91cf\u5374\u53c8\u592a\u8fc7\u7e41\u7410\uff0c\u6b64\u65f6\u53ef\u4ee5\u53d1\u6325\u8fdb\u7a0b\u6c60\u7684\u529f\u6548\u3002<\/p>\n
\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u7ef4\u62a4\u4e00\u4e2a\u8fdb\u7a0b\u6c60\u6765\u63a7\u5236\u8fdb\u7a0b\u6570\u76ee\uff0c\u6bd4\u5982httpd\u7684\u8fdb\u7a0b\u6a21\u5f0f\uff0c\u89c4\u5b9a\u6700\u5c0f\u8fdb\u7a0b\u6570\u548c\u6700\u5927\u8fdb\u7a0b\u6570\u2026 ps\uff1a\u5bf9\u4e8e\u8fdc\u7a0b\u8fc7\u7a0b\u8c03\u7528\u7684\u9ad8\u7ea7\u5e94\u7528\u7a0b\u5e8f\u800c\u8a00\uff0c\u5e94\u8be5\u4f7f\u7528\u8fdb\u7a0b\u6c60\uff0cPool\u53ef\u4ee5\u63d0\u4f9b\u6307\u5b9a\u6570\u91cf\u7684\u8fdb\u7a0b\uff0c\u4f9b\u7528\u6237\u8c03\u7528\uff0c\u5f53\u6709\u65b0\u7684\u8bf7\u6c42\u63d0\u4ea4\u5230pool\u4e2d\u65f6\uff0c\u5982\u679c\u6c60\u8fd8\u6ca1\u6709\u6ee1\uff0c\u90a3\u4e48\u5c31\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u8fdb\u7a0b\u7528\u6765\u6267\u884c\u8be5\u8bf7\u6c42\uff1b\u4f46\u5982\u679c\u6c60\u4e2d\u7684\u8fdb\u7a0b\u6570\u5df2\u7ecf\u8fbe\u5230\u89c4\u5b9a\u6700\u5927\u503c\uff0c\u90a3\u4e48\u8be5\u8bf7\u6c42\u5c31\u4f1a\u7b49\u5f85\uff0c\u76f4\u5230\u6c60\u4e2d\u6709\u8fdb\u7a0b\u7ed3\u675f\uff0c\u5c31\u91cd\u7528\u8fdb\u7a0b\u6c60\u4e2d\u7684\u8fdb\u7a0b\u3002<\/strong><\/p>\n
*\u521b\u5efa\u8fdb\u7a0b\u6c60\u7684\u7c7b\uff1a\u5982\u679c\u6307\u5b9anumprocess\u4e3a3\uff0c\u5219\u8fdb\u7a0b\u6c60\u4f1a\u4ece\u65e0\u5230\u6709\u521b\u5efa\u4e09\u4e2a\u8fdb\u7a0b\uff0c\u7136\u540e\u81ea\u59cb\u81f3\u7ec8\u4f7f\u7528\u8fd9\u4e09\u4e2a\u8fdb\u7a0b\u53bb\u6267\u884c\u6240\u6709\u4efb\u52a1\uff0c\u4e0d\u4f1a\u5f00\u542f\u5176\u4ed6\u8fdb\u7a0b*<\/em><\/strong><\/p>\n
1 Pool([numprocess  [,initializer [, initargs]]]):\u521b\u5efa\u8fdb\u7a0b\u6c60<\/code><\/pre>\n
*\u53c2\u6570\u4ecb\u7ecd\uff1a*<\/em><\/strong><\/p>\n
1 numprocess:\u8981\u521b\u5efa\u7684\u8fdb\u7a0b\u6570\uff0c\u5982\u679c\u7701\u7565\uff0c\u5c06\u9ed8\u8ba4\u4f7f\u7528cpu_count()\u7684\u503c\n2 initializer\uff1a\u662f\u6bcf\u4e2a\u5de5\u4f5c\u8fdb\u7a0b\u542f\u52a8\u65f6\u8981\u6267\u884c\u7684\u53ef\u8c03\u7528\u5bf9\u8c61\uff0c\u9ed8\u8ba4\u4e3aNone\n3 initargs\uff1a\u662f\u8981\u4f20\u7ed9initializer\u7684\u53c2\u6570\u7ec4<\/code><\/pre>\n
*\u65b9\u6cd5\u4ecb\u7ecd\uff1a*<\/em><\/strong><\/p>\n
\u4e3b\u8981\u65b9\u6cd5\uff1a<\/p>\n
1 p.apply(func [, args [, kwargs]]):\u5728\u4e00\u4e2a\u6c60\u5de5\u4f5c\u8fdb\u7a0b\u4e2d\u6267\u884cfunc(*args,**kwargs),\u7136\u540e\u8fd4\u56de\u7ed3\u679c\u3002\u9700\u8981\u5f3a\u8c03\u7684\u662f\uff1a\u6b64\u64cd\u4f5c\u5e76\u4e0d\u4f1a\u5728\u6240\u6709\u6c60\u5de5\u4f5c\u8fdb\u7a0b\u4e2d\u5e76\u6267\u884cfunc\u51fd\u6570\u3002\u5982\u679c\u8981\u901a\u8fc7\u4e0d\u540c\u53c2\u6570\u5e76\u53d1\u5730\u6267\u884cfunc\u51fd\u6570\uff0c\u5fc5\u987b\u4ece\u4e0d\u540c\u7ebf\u7a0b\u8c03\u7528p.apply()\u51fd\u6570\u6216\u8005\u4f7f\u7528p.apply_async()\n2 p.apply_async(func [, args [, kwargs]]):\u5728\u4e00\u4e2a\u6c60\u5de5\u4f5c\u8fdb\u7a0b\u4e2d\u6267\u884cfunc(*args,**kwargs),\u7136\u540e\u8fd4\u56de\u7ed3\u679c\u3002\u6b64\u65b9\u6cd5\u7684\u7ed3\u679c\u662fAsyncResult\u7c7b\u7684\u5b9e\u4f8b\uff0ccallback\u662f\u53ef\u8c03\u7528\u5bf9\u8c61\uff0c\u63a5\u6536\u8f93\u5165\u53c2\u6570\u3002\u5f53func\u7684\u7ed3\u679c\u53d8\u4e3a\u53ef\u7528\u65f6\uff0c\u5c06\u7406\u89e3\u4f20\u9012\u7ed9callback\u3002callback\u7981\u6b62\u6267\u884c\u4efb\u4f55\u963b\u585e\u64cd\u4f5c\uff0c\u5426\u5219\u5c06\u63a5\u6536\u5176\u4ed6\u5f02\u6b65\u64cd\u4f5c\u4e2d\u7684\u7ed3\u679c\u3002\n3    \n4 p.close():\u5173\u95ed\u8fdb\u7a0b\u6c60\uff0c\u9632\u6b62\u8fdb\u4e00\u6b65\u64cd\u4f5c\u3002\u5982\u679c\u6240\u6709\u64cd\u4f5c\u6301\u7eed\u6302\u8d77\uff0c\u5b83\u4eec\u5c06\u5728\u5de5\u4f5c\u8fdb\u7a0b\u7ec8\u6b62\u524d\u5b8c\u6210\n5 P.jion():\u7b49\u5f85\u6240\u6709\u5de5\u4f5c\u8fdb\u7a0b\u9000\u51fa\u3002\u6b64\u65b9\u6cd5\u53ea\u80fd\u5728close\uff08\uff09\u6216teminate()\u4e4b\u540e\u8c03\u7528<\/code><\/pre>\n
\u5176\u4ed6\u65b9\u6cd5\uff08\u4e86\u89e3\u90e8\u5206\uff09<\/p>\n
\u65b9\u6cd5apply_async()\u548cmap_async\uff08\uff09\u7684\u8fd4\u56de\u503c\u662fAsyncResul\u7684\u5b9e\u4f8bobj\u3002\u5b9e\u4f8b\u5177\u6709\u4ee5\u4e0b\u65b9\u6cd5\nobj.get():\u8fd4\u56de\u7ed3\u679c\uff0c\u5982\u679c\u6709\u5fc5\u8981\u5219\u7b49\u5f85\u7ed3\u679c\u5230\u8fbe\u3002timeout\u662f\u53ef\u9009\u7684\u3002\u5982\u679c\u5728\u6307\u5b9a\u65f6\u95f4\u5185\u8fd8\u6ca1\u6709\u5230\u8fbe\uff0c\u5c06\u5f15\u53d1\u4e00\u573a\u3002\u5982\u679c\u8fdc\u7a0b\u64cd\u4f5c\u4e2d\u5f15\u53d1\u4e86\u5f02\u5e38\uff0c\u5b83\u5c06\u5728\u8c03\u7528\u6b64\u65b9\u6cd5\u65f6\u518d\u6b21\u88ab\u5f15\u53d1\u3002\nobj.ready():\u5982\u679c\u8c03\u7528\u5b8c\u6210\uff0c\u8fd4\u56deTrue\nobj.successful():\u5982\u679c\u8c03\u7528\u5b8c\u6210\u4e14\u6ca1\u6709\u5f15\u53d1\u5f02\u5e38\uff0c\u8fd4\u56deTrue\uff0c\u5982\u679c\u5728\u7ed3\u679c\u5c31\u7eea\u4e4b\u524d\u8c03\u7528\u6b64\u65b9\u6cd5\uff0c\u5f15\u53d1\u5f02\u5e38\nobj.wait([timeout]):\u7b49\u5f85\u7ed3\u679c\u53d8\u4e3a\u53ef\u7528\u3002\nobj.terminate()\uff1a\u7acb\u5373\u7ec8\u6b62\u6240\u6709\u5de5\u4f5c\u8fdb\u7a0b\uff0c\u540c\u65f6\u4e0d\u6267\u884c\u4efb\u4f55\u6e05\u7406\u6216\u7ed3\u675f\u4efb\u4f55\u6302\u8d77\u5de5\u4f5c\u3002\u5982\u679cp\u88ab\u5783\u573e\u56de\u6536\uff0c\u5c06\u81ea\u52a8\u8c03\u7528\u6b64\u51fd\u6570<\/code><\/pre>\n
*\u5e94\u7528\uff1a*<\/em><\/strong><\/p>\n
\u540c\u6b65\u8c03\u7528apply<\/p>\n
from multiprocessing import Pool\nimport os,time\ndef work(n):\n    print('%s run' %os.getpid())\n    time.sleep(3)\n    return n**2\n\nif __name__ == '__main__':\n    p=Pool(3) #\u8fdb\u7a0b\u6c60\u4e2d\u4ece\u65e0\u5230\u6709\u521b\u5efa\u4e09\u4e2a\u8fdb\u7a0b,\u4ee5\u540e\u4e00\u76f4\u662f\u8fd9\u4e09\u4e2a\u8fdb\u7a0b\u5728\u6267\u884c\u4efb\u52a1\n    res_l=[]\n    for i in range(10):\n        res=p.apply(work,args=(i,)) #\u540c\u6b65\u8c03\u7528\uff0c\u76f4\u5230\u672c\u6b21\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u62ff\u5230res\uff0c\u7b49\u5f85\u4efb\u52a1work\u6267\u884c\u7684\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u6709\u963b\u585e\u4e5f\u53ef\u80fd\u6ca1\u6709\u963b\u585e\uff0c\u4f46\u4e0d\u7ba1\u8be5\u4efb\u52a1\u662f\u5426\u5b58\u5728\u963b\u585e\uff0c\u540c\u6b65\u8c03\u7528\u90fd\u4f1a\u5728\u539f\u5730\u7b49\u7740\uff0c\u53ea\u662f\u7b49\u7684\u8fc7\u7a0b\u4e2d\u82e5\u662f\u4efb\u52a1\u53d1\u751f\u4e86\u963b\u585e\u5c31\u4f1a\u88ab\u593a\u8d70cpu\u7684\u6267\u884c\u6743\u9650\n        res_l.append(res)\n    print(res_l)<\/code><\/pre>\n
\u5f02\u6b65\u8c03\u7528apply_async<\/p>\n
from multiprocessing import Pool\nimport os,time\ndef work(n):\n    print('%s run' %os.getpid())\n    time.sleep(3)\n    return n**2\n\nif __name__ == '__main__':\n    p=Pool(3) #\u8fdb\u7a0b\u6c60\u4e2d\u4ece\u65e0\u5230\u6709\u521b\u5efa\u4e09\u4e2a\u8fdb\u7a0b,\u4ee5\u540e\u4e00\u76f4\u662f\u8fd9\u4e09\u4e2a\u8fdb\u7a0b\u5728\u6267\u884c\u4efb\u52a1\n    res_l=[]\n    for i in range(10):\n        res=p.apply_async(work,args=(i,)) #\u540c\u6b65\u8fd0\u884c,\u963b\u585e\u3001\u76f4\u5230\u672c\u6b21\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u62ff\u5230res\n        res_l.append(res)\n\n    #\u5f02\u6b65apply_async\u7528\u6cd5\uff1a\u5982\u679c\u4f7f\u7528\u5f02\u6b65\u63d0\u4ea4\u7684\u4efb\u52a1\uff0c\u4e3b\u8fdb\u7a0b\u9700\u8981\u4f7f\u7528jion\uff0c\u7b49\u5f85\u8fdb\u7a0b\u6c60\u5185\u4efb\u52a1\u90fd\u5904\u7406\u5b8c\uff0c\u7136\u540e\u53ef\u4ee5\u7528get\u6536\u96c6\u7ed3\u679c\uff0c\u5426\u5219\uff0c\u4e3b\u8fdb\u7a0b\u7ed3\u675f\uff0c\u8fdb\u7a0b\u6c60\u53ef\u80fd\u8fd8\u6ca1\u6765\u5f97\u53ca\u6267\u884c\uff0c\u4e5f\u5c31\u8ddf\u7740\u4e00\u8d77\u7ed3\u675f\u4e86\n    p.close()\n    p.join()\n    for res in res_l:\n        print(res.get()) #\u4f7f\u7528get\u6765\u83b7\u53d6apply_aync\u7684\u7ed3\u679c,\u5982\u679c\u662fapply,\u5219\u6ca1\u6709get\u65b9\u6cd5,\u56e0\u4e3aapply\u662f\u540c\u6b65\u6267\u884c,\u7acb\u523b\u83b7\u53d6\u7ed3\u679c,\u4e5f\u6839\u672c\u65e0\u9700get<\/code><\/pre>\n
\u8be6\u89e3\uff1aapply_async\u4e0eapply<\/p>\n
#\u4e00\uff1a\u4f7f\u7528\u8fdb\u7a0b\u6c60\uff08\u5f02\u6b65\u8c03\u7528,apply_async\uff09\n#coding: utf-8\nfrom multiprocessing import Process,Pool\nimport time\n\ndef func(msg):\n    print( "msg:", msg)\n    time.sleep(1)\n    return msg\n\nif __name__ == "__main__":\n    pool = Pool(processes = 3)\n    res_l=[]\n    for i in range(10):\n        msg = "hello %d" %(i)\n        res=pool.apply_async(func, (msg, ))   #\u7ef4\u6301\u6267\u884c\u7684\u8fdb\u7a0b\u603b\u6570\u4e3aprocesses\uff0c\u5f53\u4e00\u4e2a\u8fdb\u7a0b\u6267\u884c\u5b8c\u6bd5\u540e\u4f1a\u6dfb\u52a0\u65b0\u7684\u8fdb\u7a0b\u8fdb\u53bb\n        res_l.append(res)\n    print("==============================>") #\u6ca1\u6709\u540e\u9762\u7684join\uff0c\u6216get\uff0c\u5219\u7a0b\u5e8f\u6574\u4f53\u7ed3\u675f\uff0c\u8fdb\u7a0b\u6c60\u4e2d\u7684\u4efb\u52a1\u8fd8\u6ca1\u6765\u5f97\u53ca\u5168\u90e8\u6267\u884c\u5b8c\u4e5f\u90fd\u8ddf\u7740\u4e3b\u8fdb\u7a0b\u4e00\u8d77\u7ed3\u675f\u4e86\n\n    pool.close() #\u5173\u95ed\u8fdb\u7a0b\u6c60\uff0c\u9632\u6b62\u8fdb\u4e00\u6b65\u64cd\u4f5c\u3002\u5982\u679c\u6240\u6709\u64cd\u4f5c\u6301\u7eed\u6302\u8d77\uff0c\u5b83\u4eec\u5c06\u5728\u5de5\u4f5c\u8fdb\u7a0b\u7ec8\u6b62\u524d\u5b8c\u6210\n    pool.join()   #\u8c03\u7528join\u4e4b\u524d\uff0c\u5148\u8c03\u7528close\u51fd\u6570\uff0c\u5426\u5219\u4f1a\u51fa\u9519\u3002\u6267\u884c\u5b8cclose\u540e\u4e0d\u4f1a\u6709\u65b0\u7684\u8fdb\u7a0b\u52a0\u5165\u5230pool,join\u51fd\u6570\u7b49\u5f85\u6240\u6709\u5b50\u8fdb\u7a0b\u7ed3\u675f\n\n    print(res_l) #\u770b\u5230\u7684\u662f<multiprocessing.pool.ApplyResult object at 0x10357c4e0>\u5bf9\u8c61\u7ec4\u6210\u7684\u5217\u8868,\u800c\u975e\u6700\u7ec8\u7684\u7ed3\u679c,\u4f46\u8fd9\u4e00\u6b65\u662f\u5728join\u540e\u6267\u884c\u7684,\u8bc1\u660e\u7ed3\u679c\u5df2\u7ecf\u8ba1\u7b97\u5b8c\u6bd5,\u5269\u4e0b\u7684\u4e8b\u60c5\u5c31\u662f\u8c03\u7528\u6bcf\u4e2a\u5bf9\u8c61\u4e0b\u7684get\u65b9\u6cd5\u53bb\u83b7\u53d6\u7ed3\u679c\n    for i in res_l:\n        print(i.get()) #\u4f7f\u7528get\u6765\u83b7\u53d6apply_aync\u7684\u7ed3\u679c,\u5982\u679c\u662fapply,\u5219\u6ca1\u6709get\u65b9\u6cd5,\u56e0\u4e3aapply\u662f\u540c\u6b65\u6267\u884c,\u7acb\u523b\u83b7\u53d6\u7ed3\u679c,\u4e5f\u6839\u672c\u65e0\u9700get\n\n#\u4e8c\uff1a\u4f7f\u7528\u8fdb\u7a0b\u6c60\uff08\u540c\u6b65\u8c03\u7528,apply\uff09\n#coding: utf-8\nfrom multiprocessing import Process,Pool\nimport time\n\ndef func(msg):\n    print( "msg:", msg)\n    time.sleep(0.1)\n    return msg\n\nif __name__ == "__main__":\n    pool = Pool(processes = 3)\n    res_l=[]\n    for i in range(10):\n        msg = "hello %d" %(i)\n        res=pool.apply(func, (msg, ))   #\u7ef4\u6301\u6267\u884c\u7684\u8fdb\u7a0b\u603b\u6570\u4e3aprocesses\uff0c\u5f53\u4e00\u4e2a\u8fdb\u7a0b\u6267\u884c\u5b8c\u6bd5\u540e\u4f1a\u6dfb\u52a0\u65b0\u7684\u8fdb\u7a0b\u8fdb\u53bb\n        res_l.append(res) #\u540c\u6b65\u6267\u884c\uff0c\u5373\u6267\u884c\u5b8c\u4e00\u4e2a\u62ff\u5230\u7ed3\u679c\uff0c\u518d\u53bb\u6267\u884c\u53e6\u5916\u4e00\u4e2a\n    print("==============================>")\n    pool.close()\n    pool.join()   #\u8c03\u7528join\u4e4b\u524d\uff0c\u5148\u8c03\u7528close\u51fd\u6570\uff0c\u5426\u5219\u4f1a\u51fa\u9519\u3002\u6267\u884c\u5b8cclose\u540e\u4e0d\u4f1a\u6709\u65b0\u7684\u8fdb\u7a0b\u52a0\u5165\u5230pool,join\u51fd\u6570\u7b49\u5f85\u6240\u6709\u5b50\u8fdb\u7a0b\u7ed3\u675f\n\n    print(res_l) #\u770b\u5230\u7684\u5c31\u662f\u6700\u7ec8\u7684\u7ed3\u679c\u7ec4\u6210\u7684\u5217\u8868\n    for i in res_l: #apply\u662f\u540c\u6b65\u7684\uff0c\u6240\u4ee5\u76f4\u63a5\u5f97\u5230\u7ed3\u679c\uff0c\u6ca1\u6709get()\u65b9\u6cd5\n        print(i)<\/code><\/pre>\n
*\u7ec3\u4e602\uff1a\u4f7f\u7528\u8fdb\u7a0b\u6c60\u7ef4\u62a4\u56fa\u5b9a\u6570\u76ee\u7684\u8fdb\u7a0b\uff08\u91cd\u5199\u7ec3\u4e601\uff09*<\/em><\/strong><\/p>\n
server\u7aef<\/p>\n
#Pool\u5185\u7684\u8fdb\u7a0b\u6570\u9ed8\u8ba4\u662fcpu\u6838\u6570\uff0c\u5047\u8bbe\u4e3a4\uff08\u67e5\u770b\u65b9\u6cd5os.cpu_count()\uff09\n#\u5f00\u542f6\u4e2a\u5ba2\u6237\u7aef\uff0c\u4f1a\u53d1\u73b02\u4e2a\u5ba2\u6237\u7aef\u5904\u4e8e\u7b49\u5f85\u72b6\u6001\n#\u5728\u6bcf\u4e2a\u8fdb\u7a0b\u5185\u67e5\u770bpid\uff0c\u4f1a\u53d1\u73b0pid\u4f7f\u7528\u4e3a4\u4e2a\uff0c\u5373\u591a\u4e2a\u5ba2\u6237\u7aef\u516c\u75284\u4e2a\u8fdb\u7a0b\nfrom socket import *\nfrom multiprocessing import Pool\nimport os\n\nserver=socket(AF_INET,SOCK_STREAM)\nserver.setsockopt(SOL_SOCKET,SO_REUSEADDR,1)\nserver.bind(('127.0.0.1',8080))\nserver.listen(5)\n\ndef talk(conn,client_addr):\n    print('\u8fdb\u7a0bpid: %s' %os.getpid())\n    while True:\n        try:\n            msg=conn.recv(1024)\n            if not msg:break\n            conn.send(msg.upper())\n        except Exception:\n            break\n\nif __name__ == '__main__':\n    p=Pool()\n    while True:\n        conn,client_addr=server.accept()\n        p.apply_async(talk,args=(conn,client_addr))\n        # p.apply(talk,args=(conn,client_addr)) #\u540c\u6b65\u7684\u8bdd\uff0c\u5219\u540c\u4e00\u65f6\u95f4\u53ea\u6709\u4e00\u4e2a\u5ba2\u6237\u7aef\u80fd\u8bbf\u95ee<\/code><\/pre>\n
\u5ba2\u6237\u7aef<\/p>\n
from socket import *\n\nclient=socket(AF_INET,SOCK_STREAM)\nclient.connect(('127.0.0.1',8080))\n\nwhile True:\n    msg=input('>>: ').strip()\n    if not msg:continue\n\n    client.send(msg.encode('utf-8'))\n    msg=client.recv(1024)\n    print(msg.decode('utf-8'))<\/code><\/pre>\n
\u53d1\u73b0\uff1a\u5e76\u53d1\u5f00\u542f\u591a\u4e2a\u5ba2\u6237\u7aef\uff0c\u670d\u52a1\u7aef\u540c\u4e00\u65f6\u95f4\u53ea\u67093\u4e2a\u4e0d\u540c\u7684pid\uff0c\u7ed3\u675f\u6389\u4e00\u4e2a\u5ba2\u6237\u7aef\uff0c\u53e6\u5916\u4e00\u4e2a\u5ba2\u6237\u7aef\u624d\u4f1a\u8fdb\u6765\uff0c\u88ab3\u4e2a\u8fdb\u7a0b\u4e4b\u4e00\u5904\u7406<\/p>\n
*\u56de\u6389\u51fd\u6570\uff1a*<\/em><\/strong><\/p>\n
*\u9700\u8981\u56de\u8c03\u51fd\u6570\u7684\u573a\u666f\uff1a\u8fdb\u7a0b\u6c60\u4e2d\u4efb\u4f55\u4e00\u4e2a\u4efb\u52a1\u4e00\u65e6\u5904\u7406\u5b8c\u4e86\uff0c\u5c31\u7acb\u5373\u544a\u77e5\u4e3b\u8fdb\u7a0b\uff1a\u6211\u597d\u4e86\u989d\uff0c\u4f60\u53ef\u4ee5\u5904\u7406\u6211\u7684\u7ed3\u679c\u4e86\u3002\u4e3b\u8fdb\u7a0b\u5219\u8c03\u7528\u4e00\u4e2a\u51fd\u6570\u53bb\u5904\u7406\u8be5\u7ed3\u679c\uff0c\u8be5\u51fd\u6570\u5373\u56de\u8c03\u51fd\u6570*<\/em><\/strong><\/p>\n
*\u6211\u4eec\u53ef\u4ee5\u628a\u8017\u65f6\u95f4\uff08\u963b\u585e\uff09\u7684\u4efb\u52a1\u653e\u5230\u8fdb\u7a0b\u6c60\u4e2d\uff0c\u7136\u540e\u6307\u5b9a\u56de\u8c03\u51fd\u6570\uff08\u4e3b\u8fdb\u7a0b\u8d1f\u8d23\u6267\u884c\uff09\uff0c\u8fd9\u6837\u4e3b\u8fdb\u7a0b\u5728\u6267\u884c\u56de\u8c03\u51fd\u6570\u65f6\u5c31\u7701\u53bb\u4e86I\/O\u7684\u8fc7\u7a0b\uff0c\u76f4\u63a5\u62ff\u5230\u7684\u662f\u4efb\u52a1\u7684\u7ed3\u679c\u3002*<\/em><\/strong><\/p>\n
from multiprocessing import Pool\nimport requests\nimport json\nimport os\n\ndef get_page(url):\n    print('<\u8fdb\u7a0b%s> get %s' %(os.getpid(),url))\n    respone=requests.get(url)\n    if respone.status_code == 200:\n        return {'url':url,'text':respone.text}\n\ndef pasrse_page(res):\n    print('<\u8fdb\u7a0b%s> parse %s' %(os.getpid(),res['url']))\n    parse_res='url:<%s> size:[%s]\\n' %(res['url'],len(res['text']))\n    with open('db.txt','a') as f:\n        f.write(parse_res)\n\nif __name__ == '__main__':\n    urls=[\n        'https:\/\/www.baidu.com',\n        'https:\/\/www.python.org',\n        'https:\/\/www.openstack.org',\n        'https:\/\/help.github.com\/',\n        'http:\/\/www.sina.com.cn\/'\n    ]\n\n    p=Pool(3)\n    res_l=[]\n    for url in urls:\n        res=p.apply_async(get_page,args=(url,),callback=pasrse_page)\n        res_l.append(res)\n\n    p.close()\n    p.join()\n    print([res.get() for res in res_l]) #\u62ff\u5230\u7684\u662fget_page\u7684\u7ed3\u679c,\u5176\u5b9e\u5b8c\u5168\u6ca1\u5fc5\u8981\u62ff\u8be5\u7ed3\u679c,\u8be5\u7ed3\u679c\u5df2\u7ecf\u4f20\u7ed9\u56de\u8c03\u51fd\u6570\u5904\u7406\u4e86\n\n'''\n\u6253\u5370\u7ed3\u679c:\n<\u8fdb\u7a0b3388> get https:\/\/www.baidu.com\n<\u8fdb\u7a0b3389> get https:\/\/www.python.org\n<\u8fdb\u7a0b3390> get https:\/\/www.openstack.org\n<\u8fdb\u7a0b3388> get https:\/\/help.github.com\/\n<\u8fdb\u7a0b3387> parse https:\/\/www.baidu.com\n<\u8fdb\u7a0b3389> get http:\/\/www.sina.com.cn\/\n<\u8fdb\u7a0b3387> parse https:\/\/www.python.org\n<\u8fdb\u7a0b3387> parse https:\/\/help.github.com\/\n<\u8fdb\u7a0b3387> parse http:\/\/www.sina.com.cn\/\n<\u8fdb\u7a0b3387> parse https:\/\/www.openstack.org\n[{'url': 'https:\/\/www.baidu.com', 'text': '<!DOCTYPE html>\\r\\n...',...}]\n'''<\/code><\/pre>\n
\u722c\u866b\u6848\u4f8b<\/p>\n
from multiprocessing import Pool\nimport time,random\nimport requests\nimport re\n\ndef get_page(url,pattern):\n    response=requests.get(url)\n    if response.status_code == 200:\n        return (response.text,pattern)\n\ndef parse_page(info):\n    page_content,pattern=info\n    res=re.findall(pattern,page_content)\n    for item in res:\n        dic={\n            'index':item[0],\n            'title':item[1],\n            'actor':item[2].strip()[3:],\n            'time':item[3][5:],\n            'score':item[4]+item[5]\n\n        }\n        print(dic)\nif __name__ == '__main__':\n    pattern1=re.compile(r'<dd>.*?board-index.*?>(\\d+)<.*?title="(.*?)".*?star.*?>(.*?)<.*?releasetime.*?>(.*?)<.*?integer.*?>(.*?)<.*?fraction.*?>(.*?)<',re.S)\n\n    url_dic={\n        'http:\/\/maoyan.com\/board\/7':pattern1,\n    }\n\n    p=Pool()\n    res_l=[]\n    for url,pattern in url_dic.items():\n        res=p.apply_async(get_page,args=(url,pattern),callback=parse_page)\n        res_l.append(res)\n\n    for i in res_l:\n        i.get()\n\n    # res=requests.get('http:\/\/maoyan.com\/board\/7')\n    # print(re.findall(pattern,res.text))<\/code><\/pre>\n
*\u5982\u679c\u5728\u4e3b\u8fdb\u7a0b\u4e2d\u7b49\u5f85\u8fdb\u7a0b\u6c60\u4e2d\u6240\u6709\u4efb\u52a1\u90fd\u6267\u884c\u5b8c\u6bd5\u540e\uff0c\u518d\u7edf\u4e00\u5904\u7406\u7ed3\u679c\uff0c\u5219\u65e0\u9700\u56de\u8c03\u51fd\u6570*<\/em><\/strong><\/p>\n
from multiprocessing import Pool\nimport time,random,os\n\ndef work(n):\n    time.sleep(1)\n    return n**2\nif __name__ == '__main__':\n    p=Pool()\n\n    res_l=[]\n    for i in range(10):\n        res=p.apply_async(work,args=(i,))\n        res_l.append(res)\n\n    p.close()\n    p.join() #\u7b49\u5f85\u8fdb\u7a0b\u6c60\u4e2d\u6240\u6709\u8fdb\u7a0b\u6267\u884c\u5b8c\u6bd5\n\n    nums=[]\n    for res in res_l:\n        nums.append(res.get()) #\u62ff\u5230\u6240\u6709\u7ed3\u679c\n    print(nums) #\u4e3b\u8fdb\u7a0b\u62ff\u5230\u6240\u6709\u7684\u5904\u7406\u7ed3\u679c,\u53ef\u4ee5\u5728\u4e3b\u8fdb\u7a0b\u4e2d\u8fdb\u884c\u7edf\u4e00\u8fdb\u884c\u5904\u7406<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u591a\u8fdb\u7a0b\uff08\u5b9e\u64cd\uff09 \u4e00\u3001multiprocessing\u6a21\u5757\u4ecb\u7ecd python\u4e2d\u7684\u591a\u7ebf\u7a0b\u65e0\u6cd5\u5229\u7528\u591a\u6838\u4f18\u52bf\uff0c\u5982\u679c\u60f3\u8981\u5145 […]<\/p>\n","protected":false},"author":3,"featured_media":6731,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,281,370],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/4876"}],"collection":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=4876"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/4876\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/media\/6731"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4876"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4876"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4876"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}