{"id":999455,"date":"2024-12-27T09:41:38","date_gmt":"2024-12-27T01:41:38","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/999455.html"},"modified":"2024-12-27T09:41:40","modified_gmt":"2024-12-27T01:41:40","slug":"python%e5%a6%82%e4%bd%95%e6%a0%bc%e5%bc%8f%e5%86%99%e5%85%a5%e6%96%87%e4%bb%b6","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/999455.html","title":{"rendered":"Python\u5982\u4f55\u683c\u5f0f\u5199\u5165\u6587\u4ef6"},"content":{"rendered":"

\"Python\u5982\u4f55\u683c\u5f0f\u5199\u5165\u6587\u4ef6\"<\/p>\n

\u5728Python\u4e2d\uff0c\u683c\u5f0f\u5316\u5199\u5165\u6587\u4ef6\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u5b9e\u73b0\uff0c\u4f8b\u5982\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u3001f-string\u3001\u4ee5\u53cawrite\u51fd\u6570\u7b49\u3002\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6267\u884c\u6548\u7387\u3002\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\u53ef\u4ee5\u8ba9\u6570\u636e\u4ee5\u7279\u5b9a\u7684\u683c\u5f0f\u5199\u5165\u6587\u4ef6\u3001f-string\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u7b80\u6d01\u9ad8\u6548\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\u3001\u4f7f\u7528write\u51fd\u6570\u53ef\u4ee5\u76f4\u63a5\u5c06\u5b57\u7b26\u4e32\u5199\u5165\u6587\u4ef6\u3002<\/strong>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\u2014\u2014\u4f7f\u7528f-string\u8fdb\u884c\u683c\u5f0f\u5316\u5199\u5165\u3002<\/p>\n<\/p>\n

\u4f7f\u7528f-string\u8fdb\u884c\u683c\u5f0f\u5316\u5199\u5165\u65f6\uff0c\u53ef\u4ee5\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u4e2d\u5d4c\u5165\u8868\u8fbe\u5f0f\u6765\u5b9e\u73b0\u52a8\u6001\u683c\u5f0f\u5316\u3002f-string\u662f\u4e00\u79cd\u65b0\u7684\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u5f0f\uff0c\u4ecePython 3.6\u5f00\u59cb\u5f15\u5165\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u76f4\u89c2\u3001\u7b80\u6d01\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\uff0c\u4f7f\u5f97\u4ee3\u7801\u66f4\u6613\u4e8e\u9605\u8bfb\u548c\u7ef4\u62a4\u3002f-string\u4ee5\u5b57\u6bcdf<\/code>\u6216F<\/code>\u5f00\u5934\uff0c\u540e\u9762\u8ddf\u7740\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u5b57\u7b26\u4e32\u4e2d\u7684\u8868\u8fbe\u5f0f\u7528\u82b1\u62ec\u53f7{}<\/code>\u5305\u56f4\u3002\u5728f-string\u4e2d\uff0c\u53ef\u4ee5\u76f4\u63a5\u5d4c\u5165\u53d8\u91cf\u540d\u3001\u8868\u8fbe\u5f0f\u751a\u81f3\u662f\u51fd\u6570\u8c03\u7528\uff0cPython\u4f1a\u81ea\u52a8\u8ba1\u7b97\u8868\u8fbe\u5f0f\u7684\u503c\u5e76\u683c\u5f0f\u5316\u5230\u5b57\u7b26\u4e32\u4e2d\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u6587\u4ef6\u5199\u5165\u7684\u57fa\u672c\u65b9\u6cd5 <\/p>\n<\/p>\n

\u5728Python\u4e2d\uff0c\u5c06\u6570\u636e\u5199\u5165\u6587\u4ef6\u7684\u57fa\u672c\u64cd\u4f5c\u53ef\u4ee5\u901a\u8fc7\u5185\u7f6e\u7684open()<\/code>\u51fd\u6570\u7ed3\u5408write()<\/code>\u6216writelines()<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u3002\u9996\u5148\uff0c\u6211\u4eec\u9700\u8981\u4e86\u89e3\u5982\u4f55\u6253\u5f00\u4e00\u4e2a\u6587\u4ef6\u5e76\u5199\u5165\u5185\u5bb9\u3002<\/p>\n<\/p>\n

    \n
  1. \u6253\u5f00\u6587\u4ef6<\/li>\n<\/ol>\n

    \u5728Python\u4e2d\uff0c\u4f7f\u7528open()<\/code>\u51fd\u6570\u6765\u6253\u5f00\u6587\u4ef6\u3002\u8be5\u51fd\u6570\u7684\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u6587\u4ef6\u540d\uff0c\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u6a21\u5f0f\u3002\u6a21\u5f0f\u6709\u591a\u79cd\uff0c\u5305\u62ec\uff1a<\/p>\n<\/p>\n

      \n
    • 'r'<\/code>\uff1a\u53ea\u8bfb\u6a21\u5f0f\u3002<\/li>\n
    • 'w'<\/code>\uff1a\u5199\u5165\u6a21\u5f0f\u3002\u5982\u679c\u6587\u4ef6\u5b58\u5728\uff0c\u6e05\u7a7a\u6587\u4ef6\u5185\u5bb9\uff1b\u5982\u679c\u6587\u4ef6\u4e0d\u5b58\u5728\uff0c\u521b\u5efa\u65b0\u6587\u4ef6\u3002<\/li>\n
    • 'a'<\/code>\uff1a\u8ffd\u52a0\u6a21\u5f0f\u3002\u5728\u6587\u4ef6\u672b\u5c3e\u8ffd\u52a0\u5185\u5bb9\u3002<\/li>\n
    • 'b'<\/code>\uff1a\u4e8c\u8fdb\u5236\u6a21\u5f0f\u3002<\/li>\n
    • 't'<\/code>\uff1a\u6587\u672c\u6a21\u5f0f\uff08\u9ed8\u8ba4\uff09\u3002<\/li>\n
    • 'x'<\/code>\uff1a\u72ec\u5360\u521b\u5efa\u6a21\u5f0f\uff0c\u5982\u679c\u6587\u4ef6\u5b58\u5728\u5219\u5931\u8d25\u3002<\/li>\n<\/ul>\n

      \u4f8b\u5982\uff0c\u8981\u4ee5\u5199\u6a21\u5f0f\u6253\u5f00\u4e00\u4e2a\u540d\u4e3aexample.txt<\/code>\u7684\u6587\u4ef6\uff0c\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a<\/p>\n<\/p>\n

      file = open('example.txt', 'w')<\/p>\n
      <\/code><\/pre>\n<\/p>\n
        \n
      1. \u5199\u5165\u5185\u5bb9<\/li>\n<\/ol>\n
        \u4e00\u65e6\u6587\u4ef6\u6253\u5f00\uff0c\u53ef\u4ee5\u4f7f\u7528write()<\/code>\u65b9\u6cd5\u5c06\u5b57\u7b26\u4e32\u5199\u5165\u6587\u4ef6\u3002\u6ce8\u610f\uff0cwrite()<\/code>\u65b9\u6cd5\u4e0d\u4f1a\u81ea\u52a8\u6dfb\u52a0\u6362\u884c\u7b26\u3002\u5982\u679c\u9700\u8981\u6362\u884c\uff0c\u9700\u8981\u624b\u52a8\u6dfb\u52a0\\n<\/code>\u3002<\/p>\n<\/p>\n
        file.write('Hello, World!\\n')<\/p>\n
        file.write('This is a new line.\\n')<\/p>\n
        <\/code><\/pre>\n<\/p>\n
          \n
        1. \u5173\u95ed\u6587\u4ef6<\/li>\n<\/ol>\n
          \u5199\u5165\u5b8c\u6210\u540e\uff0c\u9700\u8981\u4f7f\u7528close()<\/code>\u65b9\u6cd5\u5173\u95ed\u6587\u4ef6\uff0c\u4ee5\u786e\u4fdd\u6570\u636e\u88ab\u4fdd\u5b58\u5230\u78c1\u76d8\u3002<\/p>\n<\/p>\n
          file.close()<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u4e8c\u3001\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u5199\u5165  <\/p>\n<\/p>\n
          Python\u63d0\u4f9b\u4e86\u591a\u79cd\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u5f0f\uff0c\u5176\u4e2d\u5305\u62ec\u65e7\u5f0f\u683c\u5f0f\u5316\u3001str.format()<\/code>\u65b9\u6cd5\u548cf-string\u3002\u6211\u4eec\u5728\u8fd9\u91cc\u4e3b\u8981\u4ecb\u7ecdstr.format()<\/code>\u548cf-string\u7684\u4f7f\u7528\u3002<\/p>\n<\/p>\n
            \n
          1. \u4f7f\u7528str.format()<\/code><\/li>\n<\/ol>\n
            str.format()<\/code>\u662f\u8f83\u4e3a\u7075\u6d3b\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\uff0c\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u4e2d\u4f7f\u7528\u82b1\u62ec\u53f7{}<\/code>\u6765\u5360\u4f4d\uff0c\u7136\u540e\u5728format()<\/code>\u65b9\u6cd5\u4e2d\u63d0\u4f9b\u66ff\u6362\u7684\u503c\u3002<\/p>\n<\/p>\n
            name = 'Alice'<\/p>\n
            age = 30<\/p>\n
            file.write('Name: {}\\nAge: {}\\n'.format(name, age))<\/p>\n
            <\/code><\/pre>\n<\/p>\n
              \n
            1. \u4f7f\u7528f-string<\/li>\n<\/ol>\n
              f-string\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u7b80\u6d01\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\u3002\u901a\u8fc7\u5728\u5b57\u7b26\u4e32\u524d\u52a0f<\/code>\uff0c\u53ef\u4ee5\u5728\u5b57\u7b26\u4e32\u4e2d\u76f4\u63a5\u5f15\u7528\u53d8\u91cf\u3002<\/p>\n<\/p>\n
              file.write(f'Name: {name}\\nAge: {age}\\n')<\/p>\n
              <\/code><\/pre>\n<\/p>\n
              \u4e09\u3001\u5199\u5165\u591a\u884c\u6570\u636e  <\/p>\n<\/p>\n
              \u5f53\u9700\u8981\u5199\u5165\u591a\u884c\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528writelines()<\/code>\u65b9\u6cd5\uff0c\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u5b57\u7b26\u4e32\u5217\u8868\uff0c\u5e76\u5c06\u6bcf\u4e2a\u5b57\u7b26\u4e32\u9010\u884c\u5199\u5165\u6587\u4ef6\u3002<\/p>\n<\/p>\n
              lines = ['First line\\n', 'Second line\\n', 'Third line\\n']<\/p>\n
              file.writelines(lines)<\/p>\n
              <\/code><\/pre>\n<\/p>\n
              \u56db\u3001\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668  <\/p>\n<\/p>\n
              \u5728Python\u4e2d\uff0c\u63a8\u8350\u4f7f\u7528\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668with<\/code>\u6765\u7ba1\u7406\u6587\u4ef6\u64cd\u4f5c\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u786e\u4fdd\u6587\u4ef6\u5728\u4f7f\u7528\u5b8c\u6bd5\u540e\u81ea\u52a8\u5173\u95ed\uff0c\u5373\u4f7f\u5728\u5904\u7406\u8fc7\u7a0b\u4e2d\u53d1\u751f\u5f02\u5e38\u3002<\/p>\n<\/p>\n
              with open('example.txt', 'w') as file:<\/p>\n
                  file.write('Hello, World!\\n')<\/p>\n
                  file.write('This is a new line.\\n')<\/p>\n
              <\/code><\/pre>\n<\/p>\n
              \u4e94\u3001\u683c\u5f0f\u5316\u6570\u503c\u548c\u5b57\u7b26\u4e32  <\/p>\n<\/p>\n
              \u5728\u5199\u5165\u6587\u4ef6\u65f6\uff0c\u7ecf\u5e38\u9700\u8981\u683c\u5f0f\u5316\u6570\u503c\u548c\u5b57\u7b26\u4e32\uff0c\u4ee5\u4fdd\u8bc1\u8f93\u51fa\u7684\u7f8e\u89c2\u548c\u4e00\u81f4\u6027\u3002<\/p>\n<\/p>\n
                \n
              1. \u683c\u5f0f\u5316\u6570\u503c<\/li>\n<\/ol>\n
                \u53ef\u4ee5\u5728f-string\u4e2d\u4f7f\u7528\u683c\u5f0f\u8bf4\u660e\u7b26\u6765\u683c\u5f0f\u5316\u6570\u503c\u3002\u4f8b\u5982\uff0c\u4fdd\u7559\u4e24\u4f4d\u5c0f\u6570\uff1a<\/p>\n<\/p>\n
                pi = 3.1415926<\/p>\n
                file.write(f'Pi: {pi:.2f}\\n')<\/p>\n
                <\/code><\/pre>\n<\/p>\n
                  \n
                1. \u683c\u5f0f\u5316\u5b57\u7b26\u4e32<\/li>\n<\/ol>\n
                  \u53ef\u4ee5\u901a\u8fc7\u6307\u5b9a\u5bbd\u5ea6\u548c\u5bf9\u9f50\u65b9\u5f0f\u6765\u683c\u5f0f\u5316\u5b57\u7b26\u4e32\u3002\u4f8b\u5982\uff0c\u5de6\u5bf9\u9f50\u3001\u53f3\u5bf9\u9f50\u548c\u5c45\u4e2d\u5bf9\u9f50\uff1a<\/p>\n<\/p>\n
                  name = 'Alice'<\/p>\n
                  file.write(f'|{name:<10}|\\n')  # \u5de6\u5bf9\u9f50<\/p>\n
                  file.write(f'|{name:>10}|\\n')  # \u53f3\u5bf9\u9f50<\/p>\n
                  file.write(f'|{name:^10}|\\n')  # \u5c45\u4e2d\u5bf9\u9f50<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u516d\u3001\u5904\u7406\u5927\u6587\u4ef6  <\/p>\n<\/p>\n
                  \u5728\u5904\u7406\u5927\u6587\u4ef6\u65f6\uff0c\u4e3a\u4e86\u907f\u514d\u5185\u5b58\u6ea2\u51fa\uff0c\u53ef\u4ee5\u9009\u62e9\u9010\u884c\u5199\u5165\u6216\u4f7f\u7528\u7f13\u51b2\u533a\u3002<\/p>\n<\/p>\n
                    \n
                  1. \u9010\u884c\u5199\u5165<\/li>\n<\/ol>\n
                    \u9010\u884c\u5199\u5165\u53ef\u4ee5\u51cf\u5c11\u5185\u5b58\u5360\u7528\uff0c\u9002\u7528\u4e8e\u9700\u8981\u6309\u884c\u5904\u7406\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n
                    with open('large_file.txt', 'w') as file:<\/p>\n
                        for line in data_source:<\/p>\n
                            file.write(line + '\\n')<\/p>\n
                    <\/code><\/pre>\n<\/p>\n
                      \n
                    1. \u4f7f\u7528\u7f13\u51b2\u533a<\/li>\n<\/ol>\n
                      \u53ef\u4ee5\u901a\u8fc7\u8bbe\u7f6e\u7f13\u51b2\u533a\u5927\u5c0f\u6765\u63d0\u9ad8\u5199\u5165\u6548\u7387\u3002open()<\/code>\u51fd\u6570\u7684\u7b2c\u4e09\u4e2a\u53c2\u6570buffering<\/code>\u53ef\u4ee5\u7528\u6765\u63a7\u5236\u7f13\u51b2\u533a\u5927\u5c0f\u3002<\/p>\n<\/p>\n
                      with open('large_file.txt', 'w', buffering=2048) as file:<\/p>\n
                          file.write('Some large data...\\n')<\/p>\n
                      <\/code><\/pre>\n<\/p>\n
                      \u4e03\u3001\u9519\u8bef\u5904\u7406  <\/p>\n<\/p>\n
                      \u5728\u6587\u4ef6\u64cd\u4f5c\u4e2d\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u5404\u79cd\u9519\u8bef\uff0c\u5982\u6587\u4ef6\u4e0d\u5b58\u5728\u3001\u6743\u9650\u4e0d\u8db3\u7b49\u3002\u53ef\u4ee5\u4f7f\u7528try...except<\/code>\u5757\u6765\u6355\u83b7\u548c\u5904\u7406\u8fd9\u4e9b\u5f02\u5e38\u3002<\/p>\n<\/p>\n
                      try:<\/p>\n
                          with open('readonly.txt', 'w') as file:<\/p>\n
                              file.write('Trying to write...\\n')<\/p>\n
                      except IOError as e:<\/p>\n
                          print(f'An IOError occurred: {e}')<\/p>\n
                      <\/code><\/pre>\n<\/p>\n
                      \u901a\u8fc7\u4ee5\u4e0a\u5185\u5bb9\uff0c\u6211\u4eec\u5df2\u7ecf\u8be6\u7ec6\u4ecb\u7ecd\u4e86Python\u4e2d\u683c\u5f0f\u5316\u5199\u5165\u6587\u4ef6\u7684\u591a\u79cd\u65b9\u6cd5\u548c\u6280\u5de7\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9009\u62e9\u5408\u9002\u7684\u683c\u5f0f\u5316\u65b9\u5f0f\u548c\u6587\u4ef6\u64cd\u4f5c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6267\u884c\u6548\u7387\u3002\u65e0\u8bba\u662f\u5904\u7406\u7b80\u5355\u7684\u6587\u672c\u6587\u4ef6\u8fd8\u662f\u590d\u6742\u7684\u6570\u636e\u8f93\u51fa\uff0c\u638c\u63e1\u8fd9\u4e9b\u6280\u5de7\u90fd\u5c06\u5927\u5927\u63d0\u9ad8\u60a8\u7684\u7f16\u7a0b\u80fd\u529b\u3002<\/p>\n<\/p>\n
                      \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
                       \u5982\u4f55\u5728Python\u4e2d\u4ee5\u7279\u5b9a\u683c\u5f0f\u5199\u5165\u6587\u4ef6\uff1f<\/strong>
                      \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528open()<\/code>\u51fd\u6570\u7ed3\u5408\u6587\u4ef6\u6a21\u5f0f\uff08\u5982'w'<\/code>\u8868\u793a\u5199\u5165\u3001'a'<\/code>\u8868\u793a\u8ffd\u52a0\u7b49\uff09\u6765\u6253\u5f00\u6587\u4ef6\u3002\u4e3a\u4e86\u683c\u5f0f\u5316\u5199\u5165\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b57\u7b26\u4e32\u683c\u5f0f\u5316\u65b9\u6cd5\uff0c\u5982f-strings<\/code>\u3001str.format()<\/code>\u6216%<\/code>\u683c\u5f0f\u5316\u3002\u4f8b\u5982\uff0c\u4f7f\u7528f-strings<\/code>\u53ef\u4ee5\u65b9\u4fbf\u5730\u63d2\u5165\u53d8\u91cf\u5230\u5b57\u7b26\u4e32\u4e2d\uff0c\u7136\u540e\u5c06\u683c\u5f0f\u5316\u540e\u7684\u5b57\u7b26\u4e32\u5199\u5165\u6587\u4ef6\u3002<\/p>\n
                      \u54ea\u4e9b\u6587\u4ef6\u683c\u5f0f\u652f\u6301Python\u7684\u5199\u5165\u64cd\u4f5c\uff1f<\/strong>
                      Python\u652f\u6301\u591a\u79cd\u6587\u4ef6\u683c\u5f0f\u7684\u5199\u5165\uff0c\u5305\u62ec\u6587\u672c\u6587\u4ef6\uff08\u5982.txt<\/code>\uff09\u3001CSV\u6587\u4ef6\uff08.csv<\/code>\uff09\u3001JSON\u6587\u4ef6\uff08.json<\/code>\uff09\u3001Excel\u6587\u4ef6\uff08.xlsx<\/code>\uff09\u7b49\u3002\u5bf9\u4e8e\u4e0d\u540c\u7684\u6587\u4ef6\u683c\u5f0f\uff0c\u53ef\u80fd\u9700\u8981\u4f7f\u7528\u7279\u5b9a\u7684\u5e93\uff0c\u4f8b\u5982\u4f7f\u7528csv<\/code>\u6a21\u5757\u5904\u7406CSV\u6587\u4ef6\uff0c\u4f7f\u7528json<\/code>\u6a21\u5757\u5904\u7406JSON\u6587\u4ef6\uff0c\u6216\u4f7f\u7528pandas<\/code>\u5e93\u5904\u7406Excel\u6587\u4ef6\u3002<\/p>\n
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