{"id":923122,"date":"2024-12-26T14:44:11","date_gmt":"2024-12-26T06:44:11","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/923122.html"},"modified":"2024-12-26T14:44:13","modified_gmt":"2024-12-26T06:44:13","slug":"python%e5%a6%82%e4%bd%95%e6%b8%85%e7%a9%ba","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/923122.html","title":{"rendered":"python\u5982\u4f55\u6e05\u7a7a"},"content":{"rendered":"

\"python\u5982\u4f55\u6e05\u7a7a\"<\/p>\n

\u5728Python\u4e2d\u6e05\u7a7a\u6570\u636e\u7684\u65b9\u5f0f\u6709\u591a\u79cd\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u60a8\u8981\u6e05\u7a7a\u7684\u6570\u636e\u7c7b\u578b\u3002\u5e38\u89c1\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u6e05\u7a7a\u5217\u8868\u3001\u6e05\u7a7a\u5b57\u5178\u3001\u6e05\u7a7a\u96c6\u5408\u3001\u6e05\u7a7a\u5b57\u7b26\u4e32\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528clear()<\/code>\u65b9\u6cd5\u3001\u5c06\u53d8\u91cf\u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7a\u503c\uff0c\u6216\u8005\u4f7f\u7528\u7279\u5b9a\u7684\u6570\u636e\u7ed3\u6784\u64cd\u4f5c\u3002<\/strong>\u4e0b\u9762\u6211\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u4e9b\u65b9\u6cd5\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u6e05\u7a7a\u5217\u8868<\/p>\n<\/p>\n

\u5728Python\u4e2d\uff0c\u5217\u8868\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\uff0c\u7528\u4e8e\u5b58\u50a8\u591a\u4e2a\u9879\u76ee\u3002\u6e05\u7a7a\u5217\u8868\u901a\u5e38\u6709\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n

    \n
  1. \u4f7f\u7528clear()<\/code>\u65b9\u6cd5<\/li>\n<\/ol>\n

    clear()<\/code>\u65b9\u6cd5\u662fPython 3.3\u53ca\u4ee5\u4e0a\u7248\u672c\u4e3a\u5217\u8868\u63d0\u4f9b\u7684\u4e00\u79cd\u65b9\u4fbf\u65b9\u6cd5\uff0c\u7528\u4e8e\u6e05\u7a7a\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002<\/p>\n<\/p>\n

    my_list = [1, 2, 3, 4, 5]<\/p>\n
    my_list.clear()<\/p>\n
    print(my_list)  # \u8f93\u51fa: []<\/p>\n
    <\/code><\/pre>\n<\/p>\n
      \n
    1. \u4f7f\u7528\u5207\u7247\u64cd\u4f5c<\/li>\n<\/ol>\n
      \u5982\u679c\u4f60\u5e0c\u671b\u5728\u4fdd\u6301\u539f\u5217\u8868\u5f15\u7528\u4e0d\u53d8\u7684\u60c5\u51b5\u4e0b\u6e05\u7a7a\u5217\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528\u5207\u7247\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
      my_list = [1, 2, 3, 4, 5]<\/p>\n
      my_list[:] = []<\/p>\n
      print(my_list)  # \u8f93\u51fa: []<\/p>\n
      <\/code><\/pre>\n<\/p>\n
        \n
      1. \u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7a\u5217\u8868<\/li>\n<\/ol>\n
        \u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u76f4\u63a5\uff0c\u4f46\u4f1a\u6539\u53d8\u5217\u8868\u7684\u5f15\u7528\u3002<\/p>\n<\/p>\n
        my_list = [1, 2, 3, 4, 5]<\/p>\n
        my_list = []<\/p>\n
        print(my_list)  # \u8f93\u51fa: []<\/p>\n
        <\/code><\/pre>\n<\/p>\n
        \u4e8c\u3001\u6e05\u7a7a\u5b57\u5178<\/p>\n<\/p>\n
        \u5b57\u5178\u662f\u4e00\u79cd\u952e\u503c\u5bf9\u6570\u636e\u7ed3\u6784\uff0c\u5728Python\u4e2d\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u6e05\u7a7a\u5b57\u5178\uff1a<\/p>\n<\/p>\n
          \n
        1. \u4f7f\u7528clear()<\/code>\u65b9\u6cd5<\/li>\n<\/ol>\n
          Python\u5b57\u5178\u63d0\u4f9b\u7684clear()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u6e05\u7a7a\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u503c\u5bf9\u3002<\/p>\n<\/p>\n
          my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
          my_dict.clear()<\/p>\n
          print(my_dict)  # \u8f93\u51fa: {}<\/p>\n
          <\/code><\/pre>\n<\/p>\n
            \n
          1. \u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7a\u5b57\u5178<\/li>\n<\/ol>\n
            \u4e0e\u5217\u8868\u7c7b\u4f3c\uff0c\u91cd\u65b0\u8d4b\u503c\u662f\u4e00\u79cd\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u4f46\u4f1a\u6539\u53d8\u5b57\u5178\u7684\u5f15\u7528\u3002<\/p>\n<\/p>\n
            my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
            my_dict = {}<\/p>\n
            print(my_dict)  # \u8f93\u51fa: {}<\/p>\n
            <\/code><\/pre>\n<\/p>\n
            \u4e09\u3001\u6e05\u7a7a\u96c6\u5408<\/p>\n<\/p>\n
            \u96c6\u5408\u662f\u4e00\u79cd\u65e0\u5e8f\u7684\u3001\u4e0d\u91cd\u590d\u7684\u6570\u636e\u96c6\u5408\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u6e05\u7a7a\uff1a<\/p>\n<\/p>\n
              \n
            1. \u4f7f\u7528clear()<\/code>\u65b9\u6cd5<\/li>\n<\/ol>\n
              \u96c6\u5408\u540c\u6837\u63d0\u4f9b\u4e86clear()<\/code>\u65b9\u6cd5\u7528\u4e8e\u6e05\u7a7a\u6240\u6709\u5143\u7d20\u3002<\/p>\n<\/p>\n
              my_set = {1, 2, 3, 4, 5}<\/p>\n
              my_set.clear()<\/p>\n
              print(my_set)  # \u8f93\u51fa: set()<\/p>\n
              <\/code><\/pre>\n<\/p>\n
                \n
              1. \u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7a\u96c6\u5408<\/li>\n<\/ol>\n
                my_set = {1, 2, 3, 4, 5}<\/p>\n
                my_set = set()<\/p>\n
                print(my_set)  # \u8f93\u51fa: set()<\/p>\n
                <\/code><\/pre>\n<\/p>\n
                \u56db\u3001\u6e05\u7a7a\u5b57\u7b26\u4e32<\/p>\n<\/p>\n
                \u5728Python\u4e2d\uff0c\u5b57\u7b26\u4e32\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u8981\u201c\u6e05\u7a7a\u201d\u5b57\u7b26\u4e32\uff0c\u5b9e\u9645\u4e0a\u662f\u5c06\u5176\u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n<\/p>\n
                my_string = "Hello, World!"<\/p>\n
                my_string = ""<\/p>\n
                print(my_string)  # \u8f93\u51fa: ""<\/p>\n
                <\/code><\/pre>\n<\/p>\n
                \u4e94\u3001\u6e05\u7a7a\u6587\u4ef6\u5185\u5bb9<\/p>\n<\/p>\n
                \u6709\u65f6\u53ef\u80fd\u9700\u8981\u6e05\u7a7a\u6587\u4ef6\u7684\u5185\u5bb9\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u5b9e\u73b0\uff1a<\/p>\n<\/p>\n
                  \n
                1. \u4f7f\u7528\u6587\u4ef6\u6a21\u5f0f'w'<\/code>\u6253\u5f00\u6587\u4ef6<\/li>\n<\/ol>\n
                  with open('example.txt', 'w') as file:<\/p>\n
                      file.write('')<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u8fd9\u79cd\u65b9\u6cd5\u5c06\u6587\u4ef6\u6253\u5f00\u4e3a\u5199\u6a21\u5f0f\uff0c\u4ece\u800c\u6e05\u7a7a\u6587\u4ef6\u5185\u5bb9\u3002<\/p>\n<\/p>\n
                  \u516d\u3001\u6e05\u7a7aDataFrame\uff08Pandas\uff09<\/p>\n<\/p>\n
                  \u5728\u6570\u636e\u5206\u6790\u4e2d\uff0cPandas\u5e93\u7684DataFrame\u662f\u4e00\u79cd\u5e38\u7528\u7684\u6570\u636e\u7ed3\u6784\u3002\u8981\u6e05\u7a7aDataFrame\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
                    \n
                  1. \u4f7f\u7528drop<\/code>\u65b9\u6cd5<\/li>\n<\/ol>\n
                    \u53ef\u4ee5\u901a\u8fc7drop<\/code>\u65b9\u6cd5\u5220\u9664\u6240\u6709\u884c\u3002<\/p>\n<\/p>\n
                    import pandas as pd<\/p>\n
                    df = pd.DataFrame({'A': [1, 2], 'B': [3, 4]})<\/p>\n
                    df = df.drop(df.index)<\/p>\n
                    print(df)<\/p>\n
                    <\/code><\/pre>\n<\/p>\n
                      \n
                    1. \u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7aDataFrame<\/li>\n<\/ol>\n
                      df = pd.DataFrame({'A': [1, 2], 'B': [3, 4]})<\/p>\n
                      df = pd.DataFrame()<\/p>\n
                      print(df)<\/p>\n
                      <\/code><\/pre>\n<\/p>\n
                      \u4e03\u3001\u6e05\u7a7aNumPy\u6570\u7ec4<\/p>\n<\/p>\n
                      NumPy\u6570\u7ec4\u662f\u4e00\u79cd\u591a\u7ef4\u6570\u7ec4\u5bf9\u8c61\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u6cd5\u6e05\u7a7a\uff1a<\/p>\n<\/p>\n
                        \n
                      1. \u4f7f\u7528resize<\/code>\u65b9\u6cd5<\/li>\n<\/ol>\n
                        \u5c06\u6570\u7ec4\u7684\u5c3a\u5bf8\u8c03\u6574\u4e3a0\u3002<\/p>\n<\/p>\n
                        import numpy as np<\/p>\n
                        arr = np.array([1, 2, 3, 4, 5])<\/p>\n
                        arr.resize(0)<\/p>\n
                        print(arr)<\/p>\n
                        <\/code><\/pre>\n<\/p>\n
                          \n
                        1. \u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7a\u6570\u7ec4<\/li>\n<\/ol>\n
                          arr = np.array([1, 2, 3, 4, 5])<\/p>\n
                          arr = np.array([])<\/p>\n
                          print(arr)<\/p>\n
                          <\/code><\/pre>\n<\/p>\n
                          \u516b\u3001\u6e05\u7a7a\u961f\u5217<\/p>\n<\/p>\n
                          \u5728\u591a\u7ebf\u7a0b\u7f16\u7a0b\u4e2d\uff0c\u961f\u5217\u662f\u5e38\u7528\u7684\u7ebf\u7a0b\u5b89\u5168\u7684\u6570\u636e\u7ed3\u6784\u3002\u8981\u6e05\u7a7a\u961f\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<\/p>\n
                            \n
                          1. \u4f7f\u7528queue.Queue<\/code>\u7684queue.clear()<\/code>\u65b9\u6cd5\uff08\u5982\u679c\u5e93\u652f\u6301\uff09<\/li>\n<\/ol>\n
                            \u67d0\u4e9b\u961f\u5217\u5b9e\u73b0\u63d0\u4f9b\u4e86\u76f4\u63a5\u7684\u6e05\u7a7a\u65b9\u6cd5\u3002<\/p>\n<\/p>\n
                              \n
                            1. \u624b\u52a8\u51fa\u961f<\/li>\n<\/ol>\n
                              \u6301\u7eed\u51fa\u961f\u76f4\u5230\u961f\u5217\u4e3a\u7a7a\u3002<\/p>\n<\/p>\n
                              import queue<\/p>\n
                              q = queue.Queue()<\/p>\n
                              q.put(1)<\/p>\n
                              q.put(2)<\/p>\n
                              while not q.empty():<\/p>\n
                                  q.get()<\/p>\n
                              print(q.empty())  # \u8f93\u51fa: True<\/p>\n
                              <\/code><\/pre>\n<\/p>\n
                              \u901a\u8fc7\u4ee5\u4e0a\u4ecb\u7ecd\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230Python\u63d0\u4f9b\u4e86\u591a\u79cd\u65b9\u6cd5\u6765\u6e05\u7a7a\u4e0d\u540c\u7684\u6570\u636e\u7ed3\u6784\uff0c\u6839\u636e\u5177\u4f53\u60c5\u51b5\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u63d0\u9ad8\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u6027\u80fd\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u9700\u6839\u636e\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u6765\u6e05\u7a7a\u6570\u636e\u3002<\/p>\n<\/p>\n
                              \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
                               \u5982\u4f55\u5728Python\u4e2d\u6e05\u7a7a\u5217\u8868\uff1f<\/strong>
                              \u5728Python\u4e2d\uff0c\u6e05\u7a7a\u4e00\u4e2a\u5217\u8868\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u5f0f\u5b9e\u73b0\u3002\u6700\u5e38\u7528\u7684\u65b9\u6cd5\u662f\u4f7f\u7528clear()<\/code>\u65b9\u6cd5\uff0c\u5b83\u4f1a\u79fb\u9664\u5217\u8868\u4e2d\u7684\u6240\u6709\u5143\u7d20\u3002\u4f8b\u5982\uff1a  <\/p>\n
                              my_list = [1, 2, 3, 4]\nmy_list.clear()\nprint(my_list)  # \u8f93\u51fa\uff1a[]\n<\/code><\/pre>\n
                              \u53e6\u5916\uff0c\u8fd8\u53ef\u4ee5\u901a\u8fc7\u91cd\u65b0\u8d4b\u503c\u4e00\u4e2a\u7a7a\u5217\u8868\u6765\u5b9e\u73b0\u6e05\u7a7a\u6548\u679c\uff1a  <\/p>\n
                              my_list = [1, 2, 3, 4]\nmy_list = []\nprint(my_list)  # \u8f93\u51fa\uff1a[]\n<\/code><\/pre>\n
                              \u5982\u4f55\u5728Python\u4e2d\u6e05\u7a7a\u5b57\u7b26\u4e32\uff1f<\/strong>
                              \u5b57\u7b26\u4e32\u5728Python\u4e2d\u662f\u4e0d\u53ef\u53d8\u7684\uff0c\u56e0\u6b64\u4e0d\u80fd\u76f4\u63a5\u6e05\u7a7a\u3002\u4f46\u662f\u53ef\u4ee5\u901a\u8fc7\u91cd\u65b0\u8d4b\u503c\u4e3a\u7a7a\u5b57\u7b26\u4e32\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff1a  <\/p>\n
                              my_string = "Hello, World!"\nmy_string = ""\nprint(my_string)  # \u8f93\u51fa\uff1a''\n<\/code><\/pre>\n
                              \u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u6240\u6709\u9700\u8981\u5c06\u5b57\u7b26\u4e32\u201c\u6e05\u7a7a\u201d\u7684\u573a\u5408\u3002<\/p>\n
                              \u5982\u4f55\u5728Python\u4e2d\u6e05\u7a7a\u5b57\u5178\uff1f<\/strong>
                              \u8981\u6e05\u7a7a\u4e00\u4e2a\u5b57\u5178\uff0c\u53ef\u4ee5\u4f7f\u7528clear()<\/code>\u65b9\u6cd5\u3002\u8fd9\u79cd\u65b9\u6cd5\u4f1a\u5220\u9664\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u503c\u5bf9\u3002\u4f8b\u5982\uff1a  <\/p>\n
                              my_dict = {'a': 1, 'b': 2}\nmy_dict.clear()\nprint(my_dict)  # \u8f93\u51fa\uff1a{}\n<\/code><\/pre>\n
                              \u53e6\u5916\uff0c\u91cd\u65b0\u8d4b\u503c\u4e00\u4e2a\u7a7a\u5b57\u5178\u4e5f\u662f\u4e00\u4e2a\u6709\u6548\u7684\u65b9\u6cd5\uff1a  <\/p>\n
                              my_dict = {'a': 1, 'b': 2}\nmy_dict = {}\nprint(my_dict)  # \u8f93\u51fa\uff1a{}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u6e05\u7a7a\u6570\u636e\u7684\u65b9\u5f0f\u6709\u591a\u79cd\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u60a8\u8981\u6e05\u7a7a\u7684\u6570\u636e\u7c7b\u578b\u3002\u5e38\u89c1\u7684\u65b9\u6cd5\u5305\u62ec\uff1a\u6e05\u7a7a\u5217\u8868\u3001\u6e05\u7a7a\u5b57\u5178\u3001\u6e05\u7a7a\u96c6 […]","protected":false},"author":3,"featured_media":923126,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/923122"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=923122"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/923122\/revisions"}],"predecessor-version":[{"id":923128,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/923122\/revisions\/923128"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/923126"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=923122"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=923122"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=923122"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}