{"id":4069,"date":"2022-03-18T22:53:30","date_gmt":"2022-03-18T14:53:30","guid":{"rendered":"https:\/\/egonlin.com\/?p=4069"},"modified":"2022-04-11T18:42:34","modified_gmt":"2022-04-11T10:42:34","slug":"%e7%ac%ac%e4%ba%8c%e7%af%87%ef%bc%9a%e6%96%87%e4%bb%b6%e5%a4%84%e7%90%86","status":"publish","type":"post","link":"https:\/\/egonlin.com\/?p=4069","title":{"rendered":"\u7b2c\u4e8c\u7bc7\uff1a\u6587\u4ef6\u5904\u7406"},"content":{"rendered":"

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

\u4e00 \u5f15\u5165<\/h1>\n

\u200b \u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u4ea7\u751f\u7684\u6570\u636e\u6700\u5148\u90fd\u662f\u5b58\u653e\u4e8e\u5185\u5b58\u4e2d\u7684\uff0c\u82e5\u60f3\u6c38\u4e45\u4fdd\u5b58\u4e0b\u6765\uff0c\u5fc5\u987b\u8981\u4fdd\u5b58\u4e8e\u786c\u76d8\u4e2d\u3002\u5e94\u7528\u7a0b\u5e8f\u82e5\u60f3\u64cd\u4f5c\u786c\u4ef6\u5fc5\u987b\u901a\u8fc7\u64cd\u4f5c\u7cfb\u7edf\uff0c\u800c\u6587\u4ef6\u5c31\u662f\u64cd\u4f5c\u7cfb\u7edf\u63d0\u4f9b\u7ed9\u5e94\u7528\u7a0b\u5e8f\u6765\u64cd\u4f5c\u786c\u76d8\u7684\u865a\u62df\u6982\u5ff5\uff0c\u7528\u6237\u6216\u5e94\u7528\u7a0b\u5e8f\u5bf9\u6587\u4ef6\u7684\u64cd\u4f5c\uff0c\u5c31\u662f\u5411\u64cd\u4f5c\u7cfb\u7edf\u53d1\u8d77\u8c03\u7528\uff0c\u7136\u540e\u7531\u64cd\u4f5c\u7cfb\u7edf\u5b8c\u6210\u5bf9\u786c\u76d8\u7684\u5177\u4f53\u64cd\u4f5c\u3002<\/p>\n

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

\u4e8c \u6587\u4ef6\u64cd\u4f5c\u7684\u57fa\u672c\u6d41\u7a0b<\/h1>\n

2.1 \u57fa\u672c\u6d41\u7a0b<\/h2>\n

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

\u6709\u4e86\u6587\u4ef6\u7684\u6982\u5ff5\uff0c\u6211\u4eec\u65e0\u9700\u518d\u53bb\u8003\u8651\u64cd\u4f5c\u786c\u76d8\u7684\u7ec6\u8282\uff0c\u53ea\u9700\u8981\u5173\u6ce8\u64cd\u4f5c\u6587\u4ef6\u7684\u6d41\u7a0b\uff1a<\/p>\n

# 1. \u6253\u5f00\u6587\u4ef6\uff0c\u7531\u5e94\u7528\u7a0b\u5e8f\u5411\u64cd\u4f5c\u7cfb\u7edf\u53d1\u8d77\u7cfb\u7edf\u8c03\u7528open(...)\uff0c\u64cd\u4f5c\u7cfb\u7edf\u6253\u5f00\u8be5\u6587\u4ef6\uff0c\u5bf9\u5e94\u4e00\u5757\u786c\u76d8\u7a7a\u95f4\uff0c\u5e76\u8fd4\u56de\u4e00\u4e2a\u6587\u4ef6\u5bf9\u8c61\u8d4b\u503c\u7ed9\u4e00\u4e2a\u53d8\u91cff\nf=open('a.txt','r',encoding='utf-8') #\u9ed8\u8ba4\u6253\u5f00\u6a21\u5f0f\u5c31\u4e3ar\n\n# 2. \u8c03\u7528\u6587\u4ef6\u5bf9\u8c61\u4e0b\u7684\u8bfb\/\u5199\u65b9\u6cd5\uff0c\u4f1a\u88ab\u64cd\u4f5c\u7cfb\u7edf\u8f6c\u6362\u4e3a\u8bfb\/\u5199\u786c\u76d8\u7684\u64cd\u4f5c\ndata=f.read()\n\n# 3. \u5411\u64cd\u4f5c\u7cfb\u7edf\u53d1\u8d77\u5173\u95ed\u6587\u4ef6\u7684\u8bf7\u6c42\uff0c\u56de\u6536\u7cfb\u7edf\u8d44\u6e90\nf.close()<\/code><\/pre>\n
\"\"<\/div><\/p>\n
2.2 \u8d44\u6e90\u56de\u6536\u4e0ewith\u4e0a\u4e0b\u6587\u7ba1\u7406<\/h2>\n
\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u5305\u542b\u4e24\u90e8\u5206\u8d44\u6e90\uff1a\u5e94\u7528\u7a0b\u5e8f\u7684\u53d8\u91cff\u548c\u64cd\u4f5c\u7cfb\u7edf\u6253\u5f00\u7684\u6587\u4ef6\u3002\u5728\u64cd\u4f5c\u5b8c\u6bd5\u4e00\u4e2a\u6587\u4ef6\u65f6\uff0c\u5fc5\u987b\u628a\u4e0e\u8be5\u6587\u4ef6\u7684\u8fd9\u4e24\u90e8\u5206\u8d44\u6e90\u5168\u90e8\u56de\u6536\uff0c\u56de\u6536\u65b9\u6cd5\u4e3a\uff1a<\/p>\n
1\u3001f.close() #\u56de\u6536\u64cd\u4f5c\u7cfb\u7edf\u6253\u5f00\u7684\u6587\u4ef6\u8d44\u6e90\n2\u3001del f #\u56de\u6536\u5e94\u7528\u7a0b\u5e8f\u7ea7\u7684\u53d8\u91cf<\/code><\/pre>\n
\u5176\u4e2ddel f\u4e00\u5b9a\u8981\u53d1\u751f\u5728f.close()\u4e4b\u540e\uff0c\u5426\u5219\u5c31\u4f1a\u5bfc\u81f4\u64cd\u4f5c\u7cfb\u7edf\u6253\u5f00\u7684\u6587\u4ef6\u65e0\u6cd5\u5173\u95ed\uff0c\u767d\u767d\u5360\u7528\u8d44\u6e90\uff0c
\n\u800cpython\u81ea\u52a8\u7684\u5783\u573e\u56de\u6536\u673a\u5236\u51b3\u5b9a\u4e86\u6211\u4eec\u65e0\u9700\u8003\u8651del f\uff0c\u8fd9\u5c31\u8981\u6c42\u6211\u4eec\uff0c\u5728\u64cd\u4f5c\u5b8c\u6bd5\u6587\u4ef6\u540e\uff0c\u4e00\u5b9a\u8981\u8bb0\u4f4ff.close()\uff0c\u867d\u7136\u6211\u4eec\u5982\u6b64\u5f3a\u8c03\uff0c\u4f46\u662f\u5927\u591a\u6570\u8bfb\u8005\u8fd8\u662f\u4f1a\u4e0d\u7531\u81ea\u4e3b\u5730\u5fd8\u8bb0f.close()\uff0c\u8003\u8651\u5230\u8fd9\u4e00\u70b9\uff0cpython\u63d0\u4f9b\u4e86with\u5173\u952e\u5b57\u6765\u5e2e\u6211\u4eec\u7ba1\u7406\u4e0a\u4e0b\u6587<\/p>\n
# 1\u3001\u5728\u6267\u884c\u5b8c\u5b50\u4ee3\u7801\u5757\u540e\uff0cwith \u4f1a\u81ea\u52a8\u6267\u884cf.close()\nwith open('a.txt','w') as f:\n    pass \n\n# 2\u3001\u53ef\u7528\u7528with\u540c\u65f6\u6253\u5f00\u591a\u4e2a\u6587\u4ef6\uff0c\u7528\u9017\u53f7\u5206\u9694\u5f00\u5373\u53ef\nwith open('a.txt','r') as read_f,open('b.txt','w') as write_f:  \n    data = read_f.read()\n    write_f.write(data)<\/code><\/pre>\n
\"\"<\/div><\/p>\n
2.3 \u6307\u5b9a\u64cd\u4f5c\u6587\u672c\u6587\u4ef6\u7684\u5b57\u7b26\u7f16\u7801<\/h2>\n
f = open(...)\u662f\u7531\u64cd\u4f5c\u7cfb\u7edf\u6253\u5f00\u6587\u4ef6\uff0c\u5982\u679c\u6253\u5f00\u7684\u662f\u6587\u672c\u6587\u4ef6\uff0c\u4f1a\u6d89\u53ca\u5230\u5b57\u7b26\u7f16\u7801\u95ee\u9898\uff0c\u5982\u679c\u6ca1\u6709\u4e3aopen\u6307\u5b9a\u7f16\u7801\uff0c\u90a3\u4e48\u6253\u5f00\u6587\u672c\u6587\u4ef6\u7684\u9ed8\u8ba4\u7f16\u7801\u5f88\u660e\u663e\u662f\u64cd\u4f5c\u7cfb\u7edf\u8bf4\u4e86\u7b97\u4e86\uff0c\u64cd\u4f5c\u7cfb\u7edf\u4f1a\u7528\u81ea\u5df1\u7684\u9ed8\u8ba4\u7f16\u7801\u53bb\u6253\u5f00\u6587\u4ef6\uff0c\u5728windows\u4e0b\u662fgbk\uff0c\u5728linux\u4e0b\u662futf-8\u3002\n\u8fd9\u5c31\u7528\u5230\u4e86\u4e0a\u8282\u8bfe\u8bb2\u7684\u5b57\u7b26\u7f16\u7801\u7684\u77e5\u8bc6\uff1a\u82e5\u8981\u4fdd\u8bc1\u4e0d\u4e71\u7801\uff0c\u6587\u4ef6\u4ee5\u4ec0\u4e48\u65b9\u5f0f\u5b58\u7684\uff0c\u5c31\u8981\u4ee5\u4ec0\u4e48\u65b9\u5f0f\u6253\u5f00\u3002\n\nf = open('a.txt','r',encoding='utf-8')<\/code><\/pre>\n
\"\"<\/div><\/p>\n
\u4e09 \u6587\u4ef6\u7684\u64cd\u4f5c\u6a21\u5f0f<\/h1>\n
3.1 \u63a7\u5236\u6587\u4ef6\u8bfb\u5199\u64cd\u4f5c\u7684\u6a21\u5f0f<\/h2>\n
r(\u9ed8\u8ba4\u7684)\uff1a\u53ea\u8bfb\nw\uff1a\u53ea\u5199\na\uff1a\u53ea\u8ffd\u52a0\u5199<\/code><\/pre>\n
3.1.1 \u6848\u4f8b\u4e00\uff1ar \u6a21\u5f0f\u7684\u4f7f\u7528<\/h3>\n
# r\u53ea\u8bfb\u6a21\u5f0f: \u5728\u6587\u4ef6\u4e0d\u5b58\u5728\u65f6\u5219\u62a5\u9519,\u6587\u4ef6\u5b58\u5728\u6587\u4ef6\u5185\u6307\u9488\u76f4\u63a5\u8df3\u5230\u6587\u4ef6\u5f00\u5934\n with open('a.txt',mode='r',encoding='utf-8') as f:\n     res=f.read() # \u4f1a\u5c06\u6587\u4ef6\u7684\u5185\u5bb9\u7531\u786c\u76d8\u5168\u90e8\u8bfb\u5165\u5185\u5b58\uff0c\u8d4b\u503c\u7ed9res\n\n# \u5c0f\u7ec3\u4e60\uff1a\u5b9e\u73b0\u7528\u6237\u8ba4\u8bc1\u529f\u80fd\n inp_name=input('\u8bf7\u8f93\u5165\u4f60\u7684\u540d\u5b57: ').strip()\n inp_pwd=input('\u8bf7\u8f93\u5165\u4f60\u7684\u5bc6\u7801: ').strip()\n with open(r'db.txt',mode='r',encoding='utf-8') as f:\n     for line in f:\n         # \u628a\u7528\u6237\u8f93\u5165\u7684\u540d\u5b57\u4e0e\u5bc6\u7801\u4e0e\u8bfb\u51fa\u5185\u5bb9\u505a\u6bd4\u5bf9\n         u,p=line.strip('\\n').split(':')\n         if inp_name == u and inp_pwd == p:\n             print('\u767b\u5f55\u6210\u529f')\n             break\n     else:\n         print('\u8d26\u53f7\u540d\u6216\u8005\u5bc6\u7801\u9519\u8bef')<\/code><\/pre>\n
3.1.2 \u6848\u4f8b\u4e8c\uff1aw \u6a21\u5f0f\u7684\u4f7f\u7528<\/h3>\n
# w\u53ea\u5199\u6a21\u5f0f: \u5728\u6587\u4ef6\u4e0d\u5b58\u5728\u65f6\u4f1a\u521b\u5efa\u7a7a\u6587\u6863,\u6587\u4ef6\u5b58\u5728\u4f1a\u6e05\u7a7a\u6587\u4ef6,\u6587\u4ef6\u6307\u9488\u8dd1\u5230\u6587\u4ef6\u5f00\u5934\nwith open('b.txt',mode='w',encoding='utf-8') as f:\n    f.write('\u4f60\u597d\\n')\n    f.write('\u6211\u597d\\n') \n    f.write('\u5927\u5bb6\u597d\\n')\n    f.write('111\\n222\\n333\\n')\n#\u5f3a\u8c03\uff1a\n# 1 \u5728\u6587\u4ef6\u4e0d\u5173\u95ed\u7684\u60c5\u51b5\u4e0b,\u8fde\u7eed\u7684\u5199\u5165\uff0c\u540e\u5199\u7684\u5185\u5bb9\u4e00\u5b9a\u8ddf\u5728\u524d\u5199\u5185\u5bb9\u7684\u540e\u9762\n# 2 \u5982\u679c\u91cd\u65b0\u4ee5w\u6a21\u5f0f\u6253\u5f00\u6587\u4ef6\uff0c\u5219\u4f1a\u6e05\u7a7a\u6587\u4ef6\u5185\u5bb9<\/code><\/pre>\n
3.1.3 \u6848\u4f8b\u4e09\uff1aa \u6a21\u5f0f\u7684\u4f7f\u7528<\/h3>\n
# a\u53ea\u8ffd\u52a0\u5199\u6a21\u5f0f: \u5728\u6587\u4ef6\u4e0d\u5b58\u5728\u65f6\u4f1a\u521b\u5efa\u7a7a\u6587\u6863,\u6587\u4ef6\u5b58\u5728\u4f1a\u5c06\u6587\u4ef6\u6307\u9488\u76f4\u63a5\u79fb\u52a8\u5230\u6587\u4ef6\u672b\u5c3e\n with open('c.txt',mode='a',encoding='utf-8') as f:\n     f.write('44444\\n')\n     f.write('55555\\n')\n#\u5f3a\u8c03 w \u6a21\u5f0f\u4e0e a \u6a21\u5f0f\u7684\u5f02\u540c\uff1a\n# 1 \u76f8\u540c\u70b9\uff1a\u5728\u6253\u5f00\u7684\u6587\u4ef6\u4e0d\u5173\u95ed\u7684\u60c5\u51b5\u4e0b\uff0c\u8fde\u7eed\u7684\u5199\u5165\uff0c\u65b0\u5199\u7684\u5185\u5bb9\u603b\u4f1a\u8ddf\u5728\u524d\u5199\u7684\u5185\u5bb9\u4e4b\u540e\n# 2 \u4e0d\u540c\u70b9\uff1a\u4ee5 a \u6a21\u5f0f\u91cd\u65b0\u6253\u5f00\u6587\u4ef6\uff0c\u4e0d\u4f1a\u6e05\u7a7a\u539f\u6587\u4ef6\u5185\u5bb9\uff0c\u4f1a\u5c06\u6587\u4ef6\u6307\u9488\u76f4\u63a5\u79fb\u52a8\u5230\u6587\u4ef6\u672b\u5c3e\uff0c\u65b0\u5199\u7684\u5185\u5bb9\u6c38\u8fdc\u5199\u5728\u6700\u540e\n\n# \u5c0f\u7ec3\u4e60\uff1a\u5b9e\u73b0\u6ce8\u518c\u529f\u80fd:\n name=input('username>>>: ').strip()\n pwd=input('password>>>: ').strip()\n with open('db1.txt',mode='a',encoding='utf-8') as f:\n     info='%s:%s\\n' %(name,pwd)\n     f.write(info)<\/code><\/pre>\n
3.1.4 \u6848\u4f8b\u56db\uff1a+ \u6a21\u5f0f\u7684\u4f7f\u7528(\u4e86\u89e3)<\/h3>\n
# r+ w+ a+ :\u53ef\u8bfb\u53ef\u5199\n#\u5728\u5e73\u65f6\u5de5\u4f5c\u4e2d\uff0c\u6211\u4eec\u53ea\u5355\u7eaf\u4f7f\u7528r\/w\/a\uff0c\u8981\u4e48\u53ea\u8bfb\uff0c\u8981\u4e48\u53ea\u5199\uff0c\u4e00\u822c\u4e0d\u7528\u53ef\u8bfb\u53ef\u5199\u7684\u6a21\u5f0f<\/code><\/pre>\n
\"\"<\/div><\/p>\n
3.2 \u63a7\u5236\u6587\u4ef6\u8bfb\u5199\u5185\u5bb9\u7684\u6a21\u5f0f<\/h2>\n
\u5927\u524d\u63d0: tb\u6a21\u5f0f\u5747\u4e0d\u80fd\u5355\u72ec\u4f7f\u7528,\u5fc5\u987b\u4e0er\/w\/a\u4e4b\u4e00\u7ed3\u5408\u4f7f\u7528\nt\uff08\u9ed8\u8ba4\u7684\uff09\uff1a\u6587\u672c\u6a21\u5f0f\n    1. \u8bfb\u5199\u6587\u4ef6\u90fd\u662f\u4ee5\u5b57\u7b26\u4e32\u4e3a\u5355\u4f4d\u7684\n    2. \u53ea\u80fd\u9488\u5bf9\u6587\u672c\u6587\u4ef6\n    3. \u5fc5\u987b\u6307\u5b9aencoding\u53c2\u6570\nb\uff1a\u4e8c\u8fdb\u5236\u6a21\u5f0f:\n   1.\u8bfb\u5199\u6587\u4ef6\u90fd\u662f\u4ee5bytes\/\u4e8c\u8fdb\u5236\u4e3a\u5355\u4f4d\u7684\n   2. \u53ef\u4ee5\u9488\u5bf9\u6240\u6709\u6587\u4ef6\n   3. \u4e00\u5b9a\u4e0d\u80fd\u6307\u5b9aencoding\u53c2\u6570<\/code><\/pre>\n
3.2.1 \u6848\u4f8b\u4e00\uff1at \u6a21\u5f0f\u7684\u4f7f\u7528<\/h3>\n
# t \u6a21\u5f0f\uff1a\u5982\u679c\u6211\u4eec\u6307\u5b9a\u7684\u6587\u4ef6\u6253\u5f00\u6a21\u5f0f\u4e3ar\/w\/a\uff0c\u5176\u5b9e\u9ed8\u8ba4\u5c31\u662frt\/wt\/at\n with open('a.txt',mode='rt',encoding='utf-8') as f:\n     res=f.read() \n     print(type(res)) # \u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a\n\n with open('a.txt',mode='wt',encoding='utf-8') as f:\n     s='abc'\n     f.write(s) # \u5199\u5165\u7684\u4e5f\u5fc5\u987b\u662f\u5b57\u7b26\u4e32\u7c7b\u578b\n\n #\u5f3a\u8c03\uff1at \u6a21\u5f0f\u53ea\u80fd\u7528\u4e8e\u64cd\u4f5c\u6587\u672c\u6587\u4ef6,\u65e0\u8bba\u8bfb\u5199\uff0c\u90fd\u5e94\u8be5\u4ee5\u5b57\u7b26\u4e32\u4e3a\u5355\u4f4d\uff0c\u800c\u5b58\u53d6\u786c\u76d8\u672c\u8d28\u90fd\u662f\u4e8c\u8fdb\u5236\u7684\u5f62\u5f0f\uff0c\u5f53\u6307\u5b9a t \u6a21\u5f0f\u65f6\uff0c\u5185\u90e8\u5e2e\u6211\u4eec\u505a\u4e86\u7f16\u7801\u4e0e\u89e3\u7801\n<\/code><\/pre>\n
3.2.2 \u6848\u4f8b\u4e8c\uff1a b \u6a21\u5f0f\u7684\u4f7f\u7528<\/h3>\n
# b: \u8bfb\u5199\u90fd\u662f\u4ee5\u4e8c\u8fdb\u5236\u4f4d\u5355\u4f4d\n with open('1.mp4',mode='rb') as f:\n     data=f.read()\n     print(type(data)) # \u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a<class 'bytes'>\n\n with open('a.txt',mode='wb') as f:\n     msg="\u4f60\u597d"\n     res=msg.encode('utf-8') # res\u4e3abytes\u7c7b\u578b\n     f.write(res) # \u5728b\u6a21\u5f0f\u4e0b\u5199\u5165\u6587\u4ef6\u7684\u53ea\u80fd\u662fbytes\u7c7b\u578b\n\n#\u5f3a\u8c03\uff1ab\u6a21\u5f0f\u5bf9\u6bd4t\u6a21\u5f0f\n1\u3001\u5728\u64cd\u4f5c\u7eaf\u6587\u672c\u6587\u4ef6\u65b9\u9762t\u6a21\u5f0f\u5e2e\u6211\u4eec\u7701\u53bb\u4e86\u7f16\u7801\u4e0e\u89e3\u7801\u7684\u73af\u8282\uff0cb\u6a21\u5f0f\u5219\u9700\u8981\u624b\u52a8\u7f16\u7801\u4e0e\u89e3\u7801\uff0c\u6240\u4ee5\u6b64\u65f6t\u6a21\u5f0f\u66f4\u4e3a\u65b9\u4fbf\n2\u3001\u9488\u5bf9\u975e\u6587\u672c\u6587\u4ef6\uff08\u5982\u56fe\u7247\u3001\u89c6\u9891\u3001\u97f3\u9891\u7b49\uff09\u53ea\u80fd\u4f7f\u7528b\u6a21\u5f0f\n\n# \u5c0f\u7ec3\u4e60\uff1a \u7f16\u5199\u62f7\u8d1d\u5de5\u5177\nsrc_file=input('\u6e90\u6587\u4ef6\u8def\u5f84: ').strip()\ndst_file=input('\u76ee\u6807\u6587\u4ef6\u8def\u5f84: ').strip()\nwith open(r'%s' %src_file,mode='rb') as read_f,open(r'%s' %dst_file,mode='wb') as write_f:\n    for line in read_f:\n        # print(line)\n        write_f.write(line)<\/code><\/pre>\n
\"\"<\/div><\/p>\n
\u56db \u64cd\u4f5c\u6587\u4ef6\u7684\u65b9\u6cd5<\/h1>\n
4.1 \u91cd\u70b9<\/h2>\n
# \u8bfb\u64cd\u4f5c\nf.read()  # \u8bfb\u53d6\u6240\u6709\u5185\u5bb9,\u6267\u884c\u5b8c\u8be5\u64cd\u4f5c\u540e\uff0c\u6587\u4ef6\u6307\u9488\u4f1a\u79fb\u52a8\u5230\u6587\u4ef6\u672b\u5c3e\nf.readline()  # \u8bfb\u53d6\u4e00\u884c\u5185\u5bb9,\u5149\u6807\u79fb\u52a8\u5230\u7b2c\u4e8c\u884c\u9996\u90e8\nf.readlines()  # \u8bfb\u53d6\u6bcf\u4e00\u884c\u5185\u5bb9,\u5b58\u653e\u4e8e\u5217\u8868\u4e2d\n\n# \u5f3a\u8c03\uff1a\n# f.read()\u4e0ef.readlines()\u90fd\u662f\u5c06\u5185\u5bb9\u4e00\u6b21\u6027\u8bfb\u5165\u5185\u5bb9\uff0c\u5982\u679c\u5185\u5bb9\u8fc7\u5927\u4f1a\u5bfc\u81f4\u5185\u5b58\u6ea2\u51fa\uff0c\u82e5\u8fd8\u60f3\u5c06\u5185\u5bb9\u5168\u8bfb\u5165\u5185\u5b58\uff0c\u5219\u5fc5\u987b\u5206\u591a\u6b21\u8bfb\u5165\uff0c\u6709\u4e24\u79cd\u5b9e\u73b0\u65b9\u5f0f\uff1a\n# \u65b9\u5f0f\u4e00\nwith open('a.txt',mode='rt',encoding='utf-8') as f:\n    for line in f:\n        print(line) # \u540c\u4e00\u65f6\u523b\u53ea\u8bfb\u5165\u4e00\u884c\u5185\u5bb9\u5230\u5185\u5b58\u4e2d\n\n# \u65b9\u5f0f\u4e8c\nwith open('1.mp4',mode='rb') as f:\n    while True:\n        data=f.read(1024) # \u540c\u4e00\u65f6\u523b\u53ea\u8bfb\u51651024\u4e2aBytes\u5230\u5185\u5b58\u4e2d\n        if len(data) == 0:\n            break\n        print(data)\n\n# \u5199\u64cd\u4f5c\nf.write('1111\\n222\\n')  # \u9488\u5bf9\u6587\u672c\u6a21\u5f0f\u7684\u5199,\u9700\u8981\u81ea\u5df1\u5199\u6362\u884c\u7b26\nf.write('1111\\n222\\n'.encode('utf-8'))  # \u9488\u5bf9b\u6a21\u5f0f\u7684\u5199,\u9700\u8981\u81ea\u5df1\u5199\u6362\u884c\u7b26\nf.writelines(['333\\n','444\\n'])  # \u6587\u4ef6\u6a21\u5f0f\nf.writelines([bytes('333\\n',encoding='utf-8'),'444\\n'.encode('utf-8')]) #b\u6a21\u5f0f<\/code><\/pre>\n
\"\"<\/div><\/p>\n
4.2 \u4e86\u89e3<\/h2>\n
f.readable()  # \u6587\u4ef6\u662f\u5426\u53ef\u8bfb\nf.writable()  # \u6587\u4ef6\u662f\u5426\u53ef\u8bfb\nf.closed  # \u6587\u4ef6\u662f\u5426\u5173\u95ed\nf.encoding  # \u5982\u679c\u6587\u4ef6\u6253\u5f00\u6a21\u5f0f\u4e3ab,\u5219\u6ca1\u6709\u8be5\u5c5e\u6027\nf.flush()  # \u7acb\u523b\u5c06\u6587\u4ef6\u5185\u5bb9\u4ece\u5185\u5b58\u5237\u5230\u786c\u76d8\nf.name<\/code><\/pre>\n
\"\"<\/div><\/p>\n
\u4e94 \u4e3b\u52a8\u63a7\u5236\u6587\u4ef6\u5185\u6307\u9488\u79fb\u52a8<\/h1>\n
#\u5927\u524d\u63d0:\u6587\u4ef6\u5185\u6307\u9488\u7684\u79fb\u52a8\u90fd\u662fBytes\u4e3a\u5355\u4f4d\u7684,\u552f\u4e00\u4f8b\u5916\u7684\u662ft\u6a21\u5f0f\u4e0b\u7684read(n),n\u4ee5\u5b57\u7b26\u4e3a\u5355\u4f4d\nwith open('a.txt',mode='rt',encoding='utf-8') as f:\n     data=f.read(3) # \u8bfb\u53d63\u4e2a\u5b57\u7b26\n\nwith open('a.txt',mode='rb') as f:\n     data=f.read(3) # \u8bfb\u53d63\u4e2aBytes\n\n# \u4e4b\u524d\u6587\u4ef6\u5185\u6307\u9488\u7684\u79fb\u52a8\u90fd\u662f\u7531\u8bfb\/\u5199\u64cd\u4f5c\u800c\u88ab\u52a8\u89e6\u53d1\u7684\uff0c\u82e5\u60f3\u8bfb\u53d6\u6587\u4ef6\u67d0\u4e00\u7279\u5b9a\u4f4d\u7f6e\u7684\u6570\u636e\uff0c\u5219\u5219\u9700\u8981\u7528f.seek\u65b9\u6cd5\u4e3b\u52a8\u63a7\u5236\u6587\u4ef6\u5185\u6307\u9488\u7684\u79fb\u52a8\uff0c\u8be6\u7ec6\u7528\u6cd5\u5982\u4e0b\uff1a\n# f.seek(\u6307\u9488\u79fb\u52a8\u7684\u5b57\u8282\u6570,\u6a21\u5f0f\u63a7\u5236): \n# \u6a21\u5f0f\u63a7\u5236:\n# 0: \u9ed8\u8ba4\u7684\u6a21\u5f0f,\u8be5\u6a21\u5f0f\u4ee3\u8868\u6307\u9488\u79fb\u52a8\u7684\u5b57\u8282\u6570\u662f\u4ee5\u6587\u4ef6\u5f00\u5934\u4e3a\u53c2\u7167\u7684\n# 1: \u8be5\u6a21\u5f0f\u4ee3\u8868\u6307\u9488\u79fb\u52a8\u7684\u5b57\u8282\u6570\u662f\u4ee5\u5f53\u524d\u6240\u5728\u7684\u4f4d\u7f6e\u4e3a\u53c2\u7167\u7684\n# 2: \u8be5\u6a21\u5f0f\u4ee3\u8868\u6307\u9488\u79fb\u52a8\u7684\u5b57\u8282\u6570\u662f\u4ee5\u6587\u4ef6\u672b\u5c3e\u7684\u4f4d\u7f6e\u4e3a\u53c2\u7167\u7684\n# \u5f3a\u8c03:\u5176\u4e2d0\u6a21\u5f0f\u53ef\u4ee5\u5728t\u6216\u8005b\u6a21\u5f0f\u4f7f\u7528,\u800c1\u8ddf2\u6a21\u5f0f\u53ea\u80fd\u5728b\u6a21\u5f0f\u4e0b\u7528<\/code><\/pre>\n
\"\"<\/div><\/p>\n
5.1 \u6848\u4f8b\u4e00\uff1a 0\u6a21\u5f0f\u8be6\u89e3<\/h2>\n
# a.txt\u7528utf-8\u7f16\u7801\uff0c\u5185\u5bb9\u5982\u4e0b\uff08abc\u5404\u53601\u4e2a\u5b57\u8282\uff0c\u4e2d\u6587\u201c\u4f60\u597d\u201d\u5404\u53603\u4e2a\u5b57\u8282\uff09\nabc\u4f60\u597d\n\n# 0\u6a21\u5f0f\u7684\u4f7f\u7528\nwith open('a.txt',mode='rt',encoding='utf-8') as f:\n    f.seek(3,0)     # \u53c2\u7167\u6587\u4ef6\u5f00\u5934\u79fb\u52a8\u4e863\u4e2a\u5b57\u8282\n    print(f.tell()) # \u67e5\u770b\u5f53\u524d\u6587\u4ef6\u6307\u9488\u8ddd\u79bb\u6587\u4ef6\u5f00\u5934\u7684\u4f4d\u7f6e\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a3\n    print(f.read()) # \u4ece\u7b2c3\u4e2a\u5b57\u8282\u7684\u4f4d\u7f6e\u8bfb\u5230\u6587\u4ef6\u672b\u5c3e\uff0c\u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a\u4f60\u597d\n    # \u6ce8\u610f\uff1a\u7531\u4e8e\u5728t\u6a21\u5f0f\u4e0b\uff0c\u4f1a\u5c06\u8bfb\u53d6\u7684\u5185\u5bb9\u81ea\u52a8\u89e3\u7801\uff0c\u6240\u4ee5\u5fc5\u987b\u4fdd\u8bc1\u8bfb\u53d6\u7684\u5185\u5bb9\u662f\u4e00\u4e2a\u5b8c\u6574\u4e2d\u6587\u6570\u636e\uff0c\u5426\u5219\u89e3\u7801\u5931\u8d25\n\nwith open('a.txt',mode='rb') as f:\n    f.seek(6,0)\n    print(f.read().decode('utf-8')) #\u8f93\u51fa\u7ed3\u679c\u4e3a: \u597d<\/code><\/pre>\n
\"\"<\/div><\/p>\n
5.2 \u6848\u4f8b\u4e8c\uff1a 1\u6a21\u5f0f\u8be6\u89e3<\/h2>\n
# 1\u6a21\u5f0f\u7684\u4f7f\u7528\nwith open('a.txt',mode='rb') as f:\n    f.seek(3,1) # \u4ece\u5f53\u524d\u4f4d\u7f6e\u5f80\u540e\u79fb\u52a83\u4e2a\u5b57\u8282\uff0c\u800c\u6b64\u65f6\u7684\u5f53\u524d\u4f4d\u7f6e\u5c31\u662f\u6587\u4ef6\u5f00\u5934\n    print(f.tell()) # \u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a3\n    f.seek(4,1)     # \u4ece\u5f53\u524d\u4f4d\u7f6e\u5f80\u540e\u79fb\u52a84\u4e2a\u5b57\u8282\uff0c\u800c\u6b64\u65f6\u7684\u5f53\u524d\u4f4d\u7f6e\u4e3a3\n    print(f.tell()) # \u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a7\n<\/code><\/pre>\n
\"\"<\/div><\/p>\n
5.3 \u6848\u4f8b\u4e09\uff1a 2\u6a21\u5f0f\u8be6\u89e3<\/h2>\n
# a.txt\u7528utf-8\u7f16\u7801\uff0c\u5185\u5bb9\u5982\u4e0b\uff08abc\u5404\u53601\u4e2a\u5b57\u8282\uff0c\u4e2d\u6587\u201c\u4f60\u597d\u201d\u5404\u53603\u4e2a\u5b57\u8282\uff09\nabc\u4f60\u597d\n\n# 2\u6a21\u5f0f\u7684\u4f7f\u7528\nwith open('a.txt',mode='rb') as f:\n    f.seek(0,2)     # \u53c2\u7167\u6587\u4ef6\u672b\u5c3e\u79fb\u52a80\u4e2a\u5b57\u8282\uff0c \u5373\u76f4\u63a5\u8df3\u5230\u6587\u4ef6\u672b\u5c3e\n    print(f.tell()) # \u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a9\n    f.seek(-3,2)     # \u53c2\u7167\u6587\u4ef6\u672b\u5c3e\u5f80\u524d\u79fb\u52a8\u4e863\u4e2a\u5b57\u8282\n    print(f.read().decode('utf-8')) # \u8f93\u51fa\u7ed3\u679c\u4e3a\uff1a\u597d\n\n# \u5c0f\u7ec3\u4e60\uff1a\u5b9e\u73b0\u52a8\u6001\u67e5\u770b\u6700\u65b0\u4e00\u6761\u65e5\u5fd7\u7684\u6548\u679c\nimport time\nwith open('access.log',mode='rb') as f:\n    f.seek(0,2)\n    while True:\n        line=f.readline()\n        if len(line) == 0:\n            # \u6ca1\u6709\u5185\u5bb9\n            time.sleep(0.5)\n        else:\n            print(line.decode('utf-8'),end='')<\/code><\/pre>\n
\"\"<\/div><\/p>\n
\u516d \u6587\u4ef6\u7684\u4fee\u6539<\/h1>\n
# \u6587\u4ef6a.txt\u5185\u5bb9\u5982\u4e0b\n\u5f20\u4e00\u86cb     \u5c71\u4e1c    179    49    12344234523\n\u674e\u4e8c\u86cb     \u6cb3\u5317    163    57    13913453521\n\u738b\u5168\u86cb     \u5c71\u897f    153    62    18651433422\n\n# \u6267\u884c\u64cd\u4f5c\nwith open('a.txt',mode='r+t',encoding='utf-8') as f:\n    f.seek(9)\n    f.write('<\u5987\u5973\u4e3b\u4efb>')\n\n# \u6587\u4ef6\u4fee\u6539\u540e\u7684\u5185\u5bb9\u5982\u4e0b\n\u5f20\u4e00\u86cb<\u5987\u5973\u4e3b\u4efb> 179    49    12344234523\n\u674e\u4e8c\u86cb     \u6cb3\u5317    163    57    13913453521\n\u738b\u5168\u86cb     \u5c71\u897f    153    62    18651433422\n\n# \u5f3a\u8c03\uff1a\n# 1\u3001\u786c\u76d8\u7a7a\u95f4\u662f\u65e0\u6cd5\u4fee\u6539\u7684,\u786c\u76d8\u4e2d\u6570\u636e\u7684\u66f4\u65b0\u90fd\u662f\u7528\u65b0\u5185\u5bb9\u8986\u76d6\u65e7\u5185\u5bb9\n# 2\u3001\u5185\u5b58\u4e2d\u7684\u6570\u636e\u662f\u53ef\u4ee5\u4fee\u6539\u7684<\/code><\/pre>\n
\"\"<\/div><\/p>\n
\u6587\u4ef6\u5bf9\u5e94\u7684\u662f\u786c\u76d8\u7a7a\u95f4,\u786c\u76d8\u4e0d\u80fd\u4fee\u6539\u5bf9\u5e94\u7740\u6587\u4ef6\u672c\u8d28\u4e5f\u4e0d\u80fd\u4fee\u6539,
\n\u90a3\u6211\u4eec\u770b\u5230\u6587\u4ef6\u7684\u5185\u5bb9\u53ef\u4ee5\u4fee\u6539,\u662f\u5982\u4f55\u5b9e\u73b0\u7684\u5462?
\n\u5927\u81f4\u7684\u601d\u8def\u662f\u5c06\u786c\u76d8\u4e2d\u6587\u4ef6\u5185\u5bb9\u8bfb\u5165\u5185\u5b58,\u7136\u540e\u5728\u5185\u5b58\u4e2d\u4fee\u6539\u5b8c\u6bd5\u540e\u518d\u8986\u76d6\u56de\u786c\u76d8
\n\u5177\u4f53\u7684\u5b9e\u73b0\u65b9\u5f0f\u5206\u4e3a\u4e24\u79cd:<\/p>\n
6.1 \u6587\u4ef6\u4fee\u6539\u65b9\u5f0f\u4e00<\/h2>\n
# \u5b9e\u73b0\u601d\u8def\uff1a\u5c06\u6587\u4ef6\u5185\u5bb9\u53d1\u4e00\u6b21\u6027\u5168\u90e8\u8bfb\u5165\u5185\u5b58,\u7136\u540e\u5728\u5185\u5b58\u4e2d\u4fee\u6539\u5b8c\u6bd5\u540e\u518d\u8986\u76d6\u5199\u56de\u539f\u6587\u4ef6\n# \u4f18\u70b9: \u5728\u6587\u4ef6\u4fee\u6539\u8fc7\u7a0b\u4e2d\u540c\u4e00\u4efd\u6570\u636e\u53ea\u6709\u4e00\u4efd\n# \u7f3a\u70b9: \u4f1a\u8fc7\u591a\u5730\u5360\u7528\u5185\u5b58\nwith open('db.txt',mode='rt',encoding='utf-8') as f:\n    data=f.read()\n\nwith open('db.txt',mode='wt',encoding='utf-8') as f:\n    f.write(data.replace('kevin','SB'))<\/code><\/pre>\n
6.1 \u6587\u4ef6\u4fee\u6539\u65b9\u5f0f\u4e8c<\/h2>\n
# \u5b9e\u73b0\u601d\u8def\uff1a\u4ee5\u8bfb\u7684\u65b9\u5f0f\u6253\u5f00\u539f\u6587\u4ef6,\u4ee5\u5199\u7684\u65b9\u5f0f\u6253\u5f00\u4e00\u4e2a\u4e34\u65f6\u6587\u4ef6,\u4e00\u884c\u884c\u8bfb\u53d6\u539f\u6587\u4ef6\u5185\u5bb9,\u4fee\u6539\u5b8c\u540e\u5199\u5165\u4e34\u65f6\u6587\u4ef6...,\u5220\u6389\u539f\u6587\u4ef6,\u5c06\u4e34\u65f6\u6587\u4ef6\u91cd\u547d\u540d\u539f\u6587\u4ef6\u540d\n# \u4f18\u70b9: \u4e0d\u4f1a\u5360\u7528\u8fc7\u591a\u7684\u5185\u5b58\n# \u7f3a\u70b9: \u5728\u6587\u4ef6\u4fee\u6539\u8fc7\u7a0b\u4e2d\u540c\u4e00\u4efd\u6570\u636e\u5b58\u4e86\u4e24\u4efd\nimport os\n\nwith open('db.txt',mode='rt',encoding='utf-8') as read_f,\\\n        open('.db.txt.swap',mode='wt',encoding='utf-8') as wrife_f:\n    for line in read_f:\n        wrife_f.write(line.replace('SB','kevin'))\n\nos.remove('db.txt')\nos.rename('.db.txt.swap','db.txt')<\/code><\/pre>\n
\"\"<\/div><\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e00 \u5f15\u5165 \u200b \u5e94\u7528\u7a0b\u5e8f\u8fd0\u884c\u8fc7\u7a0b\u4e2d\u4ea7\u751f\u7684\u6570\u636e\u6700\u5148\u90fd\u662f\u5b58\u653e\u4e8e\u5185\u5b58\u4e2d\u7684\uff0c\u82e5\u60f3\u6c38\u4e45\u4fdd\u5b58\u4e0b\u6765\uff0c\u5fc5\u987b\u8981\u4fdd\u5b58\u4e8e\u786c\u76d8\u4e2d\u3002\u5e94\u7528\u7a0b […]<\/p>\n","protected":false},"author":3,"featured_media":6683,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[3,281,325],"tags":[],"_links":{"self":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/4069"}],"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=4069"}],"version-history":[{"count":0,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/posts\/4069\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=\/wp\/v2\/media\/6683"}],"wp:attachment":[{"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=4069"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=4069"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/egonlin.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=4069"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}