{"id":1165338,"date":"2025-01-15T15:19:12","date_gmt":"2025-01-15T07:19:12","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1165338.html"},"modified":"2025-01-15T15:19:15","modified_gmt":"2025-01-15T07:19:15","slug":"python%e5%a6%82%e4%bd%95%e7%bb%99%e5%ad%97%e5%85%b8%e5%8a%a0%e5%85%a5%e6%95%b0%e6%8d%ae","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1165338.html","title":{"rendered":"python\u5982\u4f55\u7ed9\u5b57\u5178\u52a0\u5165\u6570\u636e"},"content":{"rendered":"

\"python\u5982\u4f55\u7ed9\u5b57\u5178\u52a0\u5165\u6570\u636e\"<\/p>\n

Python\u4e2d\u7ed9\u5b57\u5178\u52a0\u5165\u6570\u636e\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\u3001\u4f7f\u7528update()\u65b9\u6cd5\u3001\u5229\u7528setdefault()\u65b9\u6cd5<\/strong>\u7b49\u65b9\u5f0f\u6765\u5b9e\u73b0\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u63cf\u8ff0\u5176\u4e2d\u7684\u4e00\u79cd\u65b9\u6cd5\uff0c\u5373\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\u7684\u65b9\u6cd5\u6765\u7ed9\u5b57\u5178\u52a0\u5165\u6570\u636e\u3002<\/p>\n<\/p>\n

\u76f4\u63a5\u8d4b\u503c<\/strong>\u662f\u4e00\u79cd\u6700\u5e38\u89c1\u4e14\u7b80\u5355\u7684\u65b9\u5f0f\u3002\u901a\u8fc7\u8fd9\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728\u5b57\u5178\u4e2d\u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9\uff0c\u6216\u8005\u66f4\u65b0\u5df2\u6709\u7684\u952e\u503c\u5bf9\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u5b57\u5178student<\/code>\uff0c\u5176\u4e2d\u5305\u542b\u5b66\u751f\u7684\u4fe1\u606f\uff0c\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u65b9\u5f0f\u7ed9\u5b57\u5178\u52a0\u5165\u65b0\u7684\u6570\u636e\uff1a<\/p>\n<\/p>\n

student = {'name': 'John', 'age': 25}<\/p>\n
\u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
student['gender'] = 'male'<\/p>\n
\u66f4\u65b0\u5df2\u6709\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
student['age'] = 26<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u901a\u8fc7\u4e0a\u8ff0\u4ee3\u7801\uff0c\u53ef\u4ee5\u770b\u5230\u5728\u5b57\u5178student<\/code>\u4e2d\u6210\u529f\u6dfb\u52a0\u4e86\u4e00\u4e2a\u65b0\u7684\u952e\u503c\u5bf9'gender': 'male'<\/code>\uff0c\u5e76\u4e14\u66f4\u65b0\u4e86\u5df2\u6709\u7684\u952e\u503c\u5bf9'age': 26<\/code>\u3002\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u76f4\u89c2\u3001\u7b80\u6d01\uff0c\u9002\u7528\u4e8e\u5927\u591a\u6570\u573a\u666f\u3002<\/p>\n<\/p>\n
\u63a5\u4e0b\u6765\uff0c\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4ed6\u51e0\u79cd\u65b9\u6cd5\uff0c\u5e76\u9610\u8ff0\u6bcf\u79cd\u65b9\u6cd5\u7684\u5177\u4f53\u4f7f\u7528\u573a\u666f\u53ca\u4f18\u7f3a\u70b9\u3002<\/p>\n<\/p>\n
\u4e00\u3001\u76f4\u63a5\u8d4b\u503c<\/p>\n<\/p>\n
\u76f4\u63a5\u8d4b\u503c\u662f\u4e00\u79cd\u975e\u5e38\u76f4\u89c2\u4e14\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u9002\u5408\u5927\u591a\u6570\u60c5\u51b5\u3002\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\uff0c\u53ef\u4ee5\u5f88\u65b9\u4fbf\u5730\u5411\u5b57\u5178\u4e2d\u6dfb\u52a0\u6216\u66f4\u65b0\u6570\u636e\u3002<\/p>\n<\/p>\n
\u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
# \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n
student = {'name': 'John', 'age': 25}<\/p>\n
\u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
student['gender'] = 'male'<\/p>\n
\u66f4\u65b0\u5df2\u6709\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
student['age'] = 26<\/p>\n
print(student)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u4f18\u70b9<\/h3>\n<\/p>\n
    \n
  1. \u7b80\u5355\u76f4\u89c2<\/strong>\uff1a\u4ee3\u7801\u6613\u8bfb\uff0c\u64cd\u4f5c\u7b80\u5355\u3002<\/li>\n
  2. \u7075\u6d3b\u6027\u9ad8<\/strong>\uff1a\u53ef\u4ee5\u968f\u65f6\u6dfb\u52a0\u6216\u66f4\u65b0\u5b57\u5178\u4e2d\u7684\u4efb\u610f\u952e\u503c\u5bf9\u3002<\/li>\n<\/ol>\n
    \u7f3a\u70b9<\/h3>\n<\/p>\n
      \n
    1. \u4e0d\u9002\u5408\u6279\u91cf\u64cd\u4f5c<\/strong>\uff1a\u5982\u679c\u9700\u8981\u4e00\u6b21\u6027\u6dfb\u52a0\u591a\u4e2a\u952e\u503c\u5bf9\uff0c\u4ee3\u7801\u53ef\u80fd\u4f1a\u663e\u5f97\u5197\u957f\u3002<\/li>\n
    2. \u952e\u5fc5\u987b\u5b58\u5728<\/strong>\uff1a\u5982\u679c\u952e\u4e0d\u5b58\u5728\uff0c\u4e0d\u80fd\u4f7f\u7528\u8be5\u65b9\u6cd5\u8fdb\u884c\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n
      \u4e8c\u3001\u4f7f\u7528update()\u65b9\u6cd5<\/p>\n<\/p>\n
      update()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u6279\u91cf\u6dfb\u52a0\u6216\u66f4\u65b0\u5b57\u5178\u4e2d\u7684\u952e\u503c\u5bf9\u3002\u8be5\u65b9\u6cd5\u63a5\u53d7\u4e00\u4e2a\u5b57\u5178\u6216\u4e00\u4e2a\u952e\u503c\u5bf9\u7684\u8fed\u4ee3\u5bf9\u8c61\u4f5c\u4e3a\u53c2\u6570\uff0c\u5c06\u5176\u5408\u5e76\u5230\u539f\u5b57\u5178\u4e2d\u3002<\/p>\n<\/p>\n
      \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
      # \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n
      student = {'name': 'John', 'age': 25}<\/p>\n
      \u4f7f\u7528update()\u65b9\u6cd5\u6dfb\u52a0\u591a\u4e2a\u952e\u503c\u5bf9<\/strong><\/h2>\n
      student.update({'gender': 'male', 'major': 'Physics'})<\/p>\n
      \u66f4\u65b0\u5df2\u6709\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
      student.update({'age': 26})<\/p>\n
      print(student)<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u4f18\u70b9<\/h3>\n<\/p>\n
        \n
      1. \u9002\u5408\u6279\u91cf\u64cd\u4f5c<\/strong>\uff1a\u4e00\u6b21\u6027\u53ef\u4ee5\u6dfb\u52a0\u6216\u66f4\u65b0\u591a\u4e2a\u952e\u503c\u5bf9\u3002<\/li>\n
      2. \u64cd\u4f5c\u7b80\u6d01<\/strong>\uff1a\u4ee3\u7801\u7b80\u6d01\u660e\u4e86\uff0c\u9002\u5408\u5904\u7406\u591a\u9879\u6570\u636e\u3002<\/li>\n<\/ol>\n
        \u7f3a\u70b9<\/h3>\n<\/p>\n
          \n
        1. \u9700\u8981\u521b\u5efa\u989d\u5916\u7684\u5b57\u5178\u6216\u8fed\u4ee3\u5bf9\u8c61<\/strong>\uff1a\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u8fd9\u53ef\u80fd\u4f1a\u663e\u5f97\u4e0d\u591f\u9ad8\u6548\u3002<\/li>\n
        2. \u8986\u76d6\u539f\u6709\u6570\u636e<\/strong>\uff1a\u5982\u679c\u65b0\u6dfb\u52a0\u7684\u952e\u5728\u539f\u5b57\u5178\u4e2d\u5df2\u7ecf\u5b58\u5728\uff0c\u4f1a\u8986\u76d6\u539f\u6709\u6570\u636e\u3002<\/li>\n<\/ol>\n
          \u4e09\u3001\u5229\u7528setdefault()\u65b9\u6cd5<\/p>\n<\/p>\n
          setdefault()<\/code>\u65b9\u6cd5\u7528\u4e8e\u5728\u5b57\u5178\u4e2d\u63d2\u5165\u4e00\u4e2a\u952e\u503c\u5bf9\u3002\u5982\u679c\u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u8fd4\u56de\u8be5\u952e\u5bf9\u5e94\u7684\u503c\uff1b\u5982\u679c\u952e\u4e0d\u5b58\u5728\uff0c\u5219\u63d2\u5165\u65b0\u7684\u952e\u503c\u5bf9\uff0c\u5e76\u8fd4\u56de\u8bbe\u7f6e\u7684\u9ed8\u8ba4\u503c\u3002<\/p>\n<\/p>\n
          \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
          # \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n
          student = {'name': 'John', 'age': 25}<\/p>\n
          \u4f7f\u7528setdefault()\u65b9\u6cd5\u63d2\u5165\u65b0\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
          student.setdefault('gender', 'male')<\/p>\n
          \u5c1d\u8bd5\u63d2\u5165\u5df2\u5b58\u5728\u7684\u952e<\/strong><\/h2>\n
          student.setdefault('age', 26)<\/p>\n
          print(student)<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u4f18\u70b9<\/h3>\n<\/p>\n
            \n
          1. \u907f\u514d\u8986\u76d6<\/strong>\uff1a\u5982\u679c\u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u4e0d\u4f1a\u8986\u76d6\u539f\u6709\u6570\u636e\u3002<\/li>\n
          2. \u8fd4\u56de\u503c\u65b9\u4fbf<\/strong>\uff1a\u65b9\u6cd5\u8fd4\u56de\u952e\u5bf9\u5e94\u7684\u503c\uff0c\u53ef\u4ee5\u65b9\u4fbf\u5730\u8fdb\u884c\u540e\u7eed\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n
            \u7f3a\u70b9<\/h3>\n<\/p>\n
              \n
            1. \u4e0d\u9002\u5408\u6279\u91cf\u64cd\u4f5c<\/strong>\uff1a\u4e00\u6b21\u53ea\u80fd\u63d2\u5165\u6216\u66f4\u65b0\u4e00\u4e2a\u952e\u503c\u5bf9\u3002<\/li>\n
            2. \u9ed8\u8ba4\u503c\u9650\u5236<\/strong>\uff1a\u53ea\u80fd\u8bbe\u7f6e\u4e00\u4e2a\u9ed8\u8ba4\u503c\uff0c\u7075\u6d3b\u6027\u8f83\u4f4e\u3002<\/li>\n<\/ol>\n
              \u56db\u3001\u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f<\/p>\n<\/p>\n
              \u5b57\u5178\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u975e\u5e38\u5f3a\u5927\u4e14\u7075\u6d3b\u7684\u65b9\u5f0f\uff0c\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u548c\u4fee\u6539\u5b57\u5178\u3002\u901a\u8fc7\u5b57\u5178\u63a8\u5bfc\u5f0f\uff0c\u53ef\u4ee5\u5bf9\u5b57\u5178\u4e2d\u7684\u6570\u636e\u8fdb\u884c\u8fc7\u6ee4\u3001\u53d8\u6362\u7b49\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
              \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
              # \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n
              student = {'name': 'John', 'age': 25}<\/p>\n
              \u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f\u6dfb\u52a0\u6216\u66f4\u65b0\u952e\u503c\u5bf9<\/strong><\/h2>\n
              student = {student, 'gender': 'male', 'major': 'Physics'}<\/p>\n
              print(student)<\/p>\n
              <\/code><\/pre>\n<\/p>\n
              \u4f18\u70b9<\/h3>\n<\/p>\n
                \n
              1. \u7075\u6d3b\u6027\u9ad8<\/strong>\uff1a\u53ef\u4ee5\u8fdb\u884c\u590d\u6742\u7684\u53d8\u6362\u548c\u8fc7\u6ee4\u64cd\u4f5c\u3002<\/li>\n
              2. \u4ee3\u7801\u7b80\u6d01<\/strong>\uff1a\u53ef\u4ee5\u5728\u4e00\u884c\u4ee3\u7801\u4e2d\u5b8c\u6210\u6dfb\u52a0\u6216\u66f4\u65b0\u64cd\u4f5c\u3002<\/li>\n<\/ol>\n
                \u7f3a\u70b9<\/h3>\n<\/p>\n
                  \n
                1. \u53ef\u8bfb\u6027\u8f83\u5dee<\/strong>\uff1a\u5bf9\u4e8e\u4e0d\u719f\u6089\u5b57\u5178\u63a8\u5bfc\u5f0f\u7684\u4eba\u6765\u8bf4\uff0c\u4ee3\u7801\u53ef\u80fd\u4e0d\u6613\u7406\u89e3\u3002<\/li>\n
                2. \u6027\u80fd\u95ee\u9898<\/strong>\uff1a\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u4f1a\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<\/ol>\n
                  \u4e94\u3001\u4f7f\u7528collections\u6a21\u5757\u4e2d\u7684defaultdict<\/p>\n<\/p>\n
                  defaultdict<\/code>\u662fPython\u6807\u51c6\u5e93collections\u6a21\u5757\u4e2d\u7684\u4e00\u4e2a\u7c7b\uff0c\u5b83\u662f\u5bf9\u666e\u901a\u5b57\u5178\u7684\u6269\u5c55\uff0c\u63d0\u4f9b\u4e86\u4e00\u4e2a\u9ed8\u8ba4\u503c\u673a\u5236\u3002\u5982\u679c\u8bbf\u95ee\u7684\u952e\u4e0d\u5b58\u5728\uff0cdefaultdict<\/code>\u4f1a\u81ea\u52a8\u63d2\u5165\u4e00\u4e2a\u9ed8\u8ba4\u503c\u3002<\/p>\n<\/p>\n
                  \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
                  from collections import defaultdict<\/p>\n
                  \u521b\u5efa\u4e00\u4e2adefaultdict\uff0c\u9ed8\u8ba4\u503c\u4e3a\u5217\u8868<\/strong><\/h2>\n
                  student = defaultdict(list)<\/p>\n
                  \u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
                  student['name'] = 'John'<\/p>\n
                  student['age'] = 25<\/p>\n
                  \u5c1d\u8bd5\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u952e<\/strong><\/h2>\n
                  print(student['gender'])  # \u8f93\u51fa\uff1a[]<\/p>\n
                  \u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9<\/strong><\/h2>\n
                  student['gender'] = 'male'<\/p>\n
                  print(student)<\/p>\n
                  <\/code><\/pre>\n<\/p>\n
                  \u4f18\u70b9<\/h3>\n<\/p>\n
                    \n
                  1. \u9ed8\u8ba4\u503c\u673a\u5236<\/strong>\uff1a\u53ef\u4ee5\u907f\u514d\u8bbf\u95ee\u4e0d\u5b58\u5728\u7684\u952e\u65f6\u5f15\u53d1\u9519\u8bef\u3002<\/li>\n
                  2. \u9002\u5408\u5904\u7406\u5d4c\u5957\u6570\u636e\u7ed3\u6784<\/strong>\uff1a\u7279\u522b\u9002\u7528\u4e8e\u5904\u7406\u5d4c\u5957\u7684\u5b57\u5178\u7ed3\u6784\u3002<\/li>\n<\/ol>\n
                    \u7f3a\u70b9<\/h3>\n<\/p>\n
                      \n
                    1. \u4f9d\u8d56\u5916\u90e8\u5e93<\/strong>\uff1a\u9700\u8981\u5bfc\u5165collections\u6a21\u5757\uff0c\u589e\u52a0\u4e86\u4ee3\u7801\u7684\u590d\u6742\u6027\u3002<\/li>\n
                    2. \u9ed8\u8ba4\u503c\u9650\u5236<\/strong>\uff1a\u53ea\u80fd\u8bbe\u7f6e\u4e00\u79cd\u9ed8\u8ba4\u503c\u7c7b\u578b\uff0c\u7075\u6d3b\u6027\u8f83\u4f4e\u3002<\/li>\n<\/ol>\n
                      \u516d\u3001\u4f7f\u7528json\u6a21\u5757<\/p>\n<\/p>\n
                      \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u4eceJSON\u6570\u636e\u4e2d\u521b\u5efa\u6216\u66f4\u65b0\u5b57\u5178\u3002Python\u7684json\u6a21\u5757\u63d0\u4f9b\u4e86\u65b9\u4fbf\u7684\u65b9\u6cd5\u6765\u89e3\u6790\u548c\u751f\u6210JSON\u6570\u636e\u3002<\/p>\n<\/p>\n
                      \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
                      import json<\/p>\n
                      \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
                      student = {'name': 'John', 'age': 25}<\/p>\n
                      JSON\u6570\u636e<\/strong><\/h2>\n
                      json_data = '{"gender": "male", "major": "Physics"}'<\/p>\n
                      \u5c06JSON\u6570\u636e\u89e3\u6790\u4e3a\u5b57\u5178<\/strong><\/h2>\n
                      new_data = json.loads(json_data)<\/p>\n
                      \u4f7f\u7528update()\u65b9\u6cd5\u5408\u5e76\u5b57\u5178<\/strong><\/h2>\n
                      student.update(new_data)<\/p>\n
                      print(student)<\/p>\n
                      <\/code><\/pre>\n<\/p>\n
                      \u4f18\u70b9<\/h3>\n<\/p>\n
                        \n
                      1. \u5904\u7406JSON\u6570\u636e<\/strong>\uff1a\u9002\u7528\u4e8e\u4eceJSON\u6570\u636e\u4e2d\u521b\u5efa\u6216\u66f4\u65b0\u5b57\u5178\u3002<\/li>\n
                      2. \u7075\u6d3b\u6027\u9ad8<\/strong>\uff1a\u53ef\u4ee5\u5904\u7406\u590d\u6742\u7684\u5d4c\u5957\u7ed3\u6784\u3002<\/li>\n<\/ol>\n
                        \u7f3a\u70b9<\/h3>\n<\/p>\n
                          \n
                        1. \u4f9d\u8d56\u5916\u90e8\u5e93<\/strong>\uff1a\u9700\u8981\u5bfc\u5165json\u6a21\u5757\uff0c\u589e\u52a0\u4e86\u4ee3\u7801\u7684\u590d\u6742\u6027\u3002<\/li>\n
                        2. \u6027\u80fd\u95ee\u9898<\/strong>\uff1a\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u4f1a\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<\/ol>\n
                          \u4e03\u3001\u4f7f\u7528pandas\u6a21\u5757<\/p>\n<\/p>\n
                          \u5728\u5904\u7406\u6570\u636e\u5206\u6790\u4efb\u52a1\u65f6\uff0cpandas\u6a21\u5757\u63d0\u4f9b\u4e86\u5f3a\u5927\u7684\u6570\u636e\u7ed3\u6784\u548c\u6570\u636e\u5206\u6790\u5de5\u5177\u3002\u53ef\u4ee5\u4f7f\u7528pandas\u4e2d\u7684DataFrame\u6765\u521b\u5efa\u548c\u66f4\u65b0\u5b57\u5178\u3002<\/p>\n<\/p>\n
                          \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
                          import pandas as pd<\/p>\n
                          \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
                          student = {'name': 'John', 'age': 25}<\/p>\n
                          \u521b\u5efa\u4e00\u4e2aDataFrame<\/strong><\/h2>\n
                          df = pd.DataFrame([{'gender': 'male', 'major': 'Physics'}])<\/p>\n
                          \u5c06DataFrame\u8f6c\u6362\u4e3a\u5b57\u5178\u5e76\u66f4\u65b0<\/strong><\/h2>\n
                          student.update(df.to_dict(orient='records')[0])<\/p>\n
                          print(student)<\/p>\n
                          <\/code><\/pre>\n<\/p>\n
                          \u4f18\u70b9<\/h3>\n<\/p>\n
                            \n
                          1. \u5f3a\u5927\u7684\u6570\u636e\u5206\u6790\u5de5\u5177<\/strong>\uff1a\u9002\u7528\u4e8e\u6570\u636e\u5206\u6790\u4efb\u52a1\uff0c\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u6570\u636e\u64cd\u4f5c\u529f\u80fd\u3002<\/li>\n
                          2. \u5904\u7406\u590d\u6742\u6570\u636e\u7ed3\u6784<\/strong>\uff1a\u53ef\u4ee5\u65b9\u4fbf\u5730\u5904\u7406\u590d\u6742\u7684\u6570\u636e\u7ed3\u6784\u3002<\/li>\n<\/ol>\n
                            \u7f3a\u70b9<\/h3>\n<\/p>\n
                              \n
                            1. \u4f9d\u8d56\u5916\u90e8\u5e93<\/strong>\uff1a\u9700\u8981\u5bfc\u5165pandas\u6a21\u5757\uff0c\u589e\u52a0\u4e86\u4ee3\u7801\u7684\u590d\u6742\u6027\u3002<\/li>\n
                            2. \u6027\u80fd\u95ee\u9898<\/strong>\uff1a\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u4f1a\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<\/ol>\n
                              \u516b\u3001\u4f7f\u7528deepcopy\u65b9\u6cd5<\/p>\n<\/p>\n
                              \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u6df1\u62f7\u8d1d\u4e00\u4e2a\u5b57\u5178\uff0c\u5e76\u5728\u526f\u672c\u4e0a\u8fdb\u884c\u4fee\u6539\u3002\u53ef\u4ee5\u4f7f\u7528copy\u6a21\u5757\u4e2d\u7684deepcopy\u65b9\u6cd5\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n<\/p>\n
                              \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
                              import copy<\/p>\n
                              \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/strong><\/h2>\n
                              student = {'name': 'John', 'age': 25}<\/p>\n
                              \u6df1\u62f7\u8d1d\u5b57\u5178<\/strong><\/h2>\n
                              student_copy = copy.deepcopy(student)<\/p>\n
                              \u4fee\u6539\u526f\u672c<\/strong><\/h2>\n
                              student_copy['gender'] = 'male'<\/p>\n
                              print(student)<\/p>\n
                              print(student_copy)<\/p>\n
                              <\/code><\/pre>\n<\/p>\n
                              \u4f18\u70b9<\/h3>\n<\/p>\n
                                \n
                              1. \u907f\u514d\u4fee\u6539\u539f\u5b57\u5178<\/strong>\uff1a\u53ef\u4ee5\u5728\u526f\u672c\u4e0a\u8fdb\u884c\u4fee\u6539\uff0c\u907f\u514d\u5f71\u54cd\u539f\u5b57\u5178\u3002<\/li>\n
                              2. \u5904\u7406\u5d4c\u5957\u7ed3\u6784<\/strong>\uff1a\u9002\u7528\u4e8e\u5904\u7406\u5d4c\u5957\u7684\u5b57\u5178\u7ed3\u6784\u3002<\/li>\n<\/ol>\n
                                \u7f3a\u70b9<\/h3>\n<\/p>\n
                                  \n
                                1. \u4f9d\u8d56\u5916\u90e8\u5e93<\/strong>\uff1a\u9700\u8981\u5bfc\u5165copy\u6a21\u5757\uff0c\u589e\u52a0\u4e86\u4ee3\u7801\u7684\u590d\u6742\u6027\u3002<\/li>\n
                                2. \u6027\u80fd\u95ee\u9898<\/strong>\uff1a\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u4f1a\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<\/li>\n<\/ol>\n
                                  \u4e5d\u3001\u4f7f\u7528dict\u5185\u7f6e\u65b9\u6cd5<\/p>\n<\/p>\n
                                  Python\u7684dict\u7c7b\u63d0\u4f9b\u4e86\u4e00\u4e9b\u5185\u7f6e\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u6765\u521b\u5efa\u548c\u66f4\u65b0\u5b57\u5178\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528fromkeys()<\/code>\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u5178\uff0c\u5e76\u4f7f\u7528update()<\/code>\u65b9\u6cd5\u8fdb\u884c\u66f4\u65b0\u3002<\/p>\n<\/p>\n
                                  \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
                                  # \u4f7f\u7528fromkeys()\u65b9\u6cd5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5b57\u5178<\/p>\n
                                  keys = ['name', 'age', 'gender']<\/p>\n
                                  student = dict.fromkeys(keys, None)<\/p>\n
                                  \u66f4\u65b0\u5b57\u5178<\/strong><\/h2>\n
                                  student.update({'name': 'John', 'age': 25, 'gender': 'male'})<\/p>\n
                                  print(student)<\/p>\n
                                  <\/code><\/pre>\n<\/p>\n
                                  \u4f18\u70b9<\/h3>\n<\/p>\n
                                    \n
                                  1. \u5185\u7f6e\u65b9\u6cd5<\/strong>\uff1a\u4e0d\u9700\u8981\u4f9d\u8d56\u5916\u90e8\u5e93\uff0c\u4ee3\u7801\u7b80\u6d01\u3002<\/li>\n
                                  2. \u9002\u5408\u6279\u91cf\u64cd\u4f5c<\/strong>\uff1a\u53ef\u4ee5\u4e00\u6b21\u6027\u521b\u5efa\u591a\u4e2a\u952e\uff0c\u5e76\u8fdb\u884c\u66f4\u65b0\u3002<\/li>\n<\/ol>\n
                                    \u7f3a\u70b9<\/h3>\n<\/p>\n
                                      \n
                                    1. \u9ed8\u8ba4\u503c\u9650\u5236<\/strong>\uff1a\u53ea\u80fd\u8bbe\u7f6e\u4e00\u79cd\u9ed8\u8ba4\u503c\uff0c\u7075\u6d3b\u6027\u8f83\u4f4e\u3002<\/li>\n
                                    2. \u8986\u76d6\u539f\u6709\u6570\u636e<\/strong>\uff1a\u5982\u679c\u65b0\u6dfb\u52a0\u7684\u952e\u5728\u539f\u5b57\u5178\u4e2d\u5df2\u7ecf\u5b58\u5728\uff0c\u4f1a\u8986\u76d6\u539f\u6709\u6570\u636e\u3002<\/li>\n<\/ol>\n
                                      \u5341\u3001\u4f7f\u7528for\u5faa\u73af<\/p>\n<\/p>\n
                                      \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u6839\u636e\u4e00\u5b9a\u7684\u89c4\u5219\u6765\u6279\u91cf\u6dfb\u52a0\u6216\u66f4\u65b0\u5b57\u5178\u4e2d\u7684\u952e\u503c\u5bf9\u3002\u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n<\/p>\n
                                      \u793a\u4f8b\u4ee3\u7801<\/h3>\n<\/p>\n
                                      # \u521b\u5efa\u4e00\u4e2a\u5b57\u5178<\/p>\n
                                      student = {'name': 'John', 'age': 25}<\/p>\n
                                      \u65b0\u7684\u6570\u636e<\/strong><\/h2>\n
                                      new_data = {'gender': 'male', 'major': 'Physics'}<\/p>\n
                                      \u4f7f\u7528for\u5faa\u73af\u6279\u91cf\u6dfb\u52a0\u6216\u66f4\u65b0\u952e\u503c\u5bf9<\/strong><\/h2>\n
                                      for key, value in new_data.items():<\/p>\n
                                          student[key] = value<\/p>\n
                                      print(student)<\/p>\n
                                      <\/code><\/pre>\n<\/p>\n
                                      \u4f18\u70b9<\/h3>\n<\/p>\n
                                        \n
                                      1. \u7075\u6d3b\u6027\u9ad8<\/strong>\uff1a\u53ef\u4ee5\u6839\u636e\u4e00\u5b9a\u7684\u89c4\u5219\u6765\u6279\u91cf\u6dfb\u52a0\u6216\u66f4\u65b0\u952e\u503c\u5bf9\u3002<\/li>\n
                                      2. \u4ee3\u7801\u7b80\u6d01<\/strong>\uff1a\u9002\u7528\u4e8e\u5904\u7406\u8f83\u5c0f\u89c4\u6a21\u7684\u6570\u636e\u3002<\/li>\n<\/ol>\n
                                        \u7f3a\u70b9<\/h3>\n<\/p>\n
                                          \n
                                        1. \u6027\u80fd\u95ee\u9898<\/strong>\uff1a\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u65f6\uff0c\u53ef\u80fd\u4f1a\u5b58\u5728\u6027\u80fd\u95ee\u9898\u3002<\/li>\n
                                        2. \u4ee3\u7801\u5197\u957f<\/strong>\uff1a\u5982\u679c\u89c4\u5219\u590d\u6742\uff0c\u4ee3\u7801\u53ef\u80fd\u4f1a\u663e\u5f97\u5197\u957f\u3002<\/li>\n<\/ol>\n
                                          \u901a\u8fc7\u4ee5\u4e0a\u591a\u79cd\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u9009\u62e9\u5408\u9002\u7684\u65b9\u5f0f\u6765\u7ed9\u5b57\u5178\u52a0\u5165\u6570\u636e\u3002\u6bcf\u79cd\u65b9\u6cd5\u90fd\u6709\u5176\u4f18\u7f3a\u70b9\uff0c\u9700\u8981\u6839\u636e\u5b9e\u9645\u60c5\u51b5\u8fdb\u884c\u6743\u8861\u548c\u9009\u62e9\u3002<\/p>\n<\/p>\n
                                          \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
                                           \u5982\u4f55\u5728Python\u5b57\u5178\u4e2d\u6dfb\u52a0\u65b0\u952e\u503c\u5bf9\uff1f<\/strong>
                                          \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684\u8d4b\u503c\u64cd\u4f5c\u6765\u5411\u5b57\u5178\u4e2d\u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u5b57\u5178 my_dict<\/code>\uff0c\u60f3\u8981\u6dfb\u52a0\u4e00\u4e2a\u65b0\u952e 'age'<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a  <\/p>\n
                                          my_dict['age'] = 25\n<\/code><\/pre>\n
                                          \u8fd9\u6837\uff0c\u5b57\u5178\u5c06\u4f1a\u5305\u542b\u65b0\u7684\u952e 'age'<\/code> \u53ca\u5176\u5bf9\u5e94\u7684\u503c 25<\/code>\u3002<\/p>\n
                                          \u80fd\u5426\u4f7f\u7528update\u65b9\u6cd5\u5c06\u591a\u4e2a\u952e\u503c\u5bf9\u6dfb\u52a0\u5230\u5b57\u5178\u4e2d\uff1f<\/strong>
                                          \u662f\u7684\uff0cPython\u7684\u5b57\u5178\u63d0\u4f9b\u4e86 update()<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u7528\u6765\u4e00\u6b21\u6027\u6dfb\u52a0\u591a\u4e2a\u952e\u503c\u5bf9\u3002\u5047\u8bbe\u4f60\u6709\u4e00\u4e2a\u5b57\u5178 my_dict<\/code>\uff0c\u60f3\u8981\u6dfb\u52a0\u591a\u4e2a\u503c\uff0c\u53ef\u4ee5\u8fd9\u6837\u505a\uff1a  <\/p>\n
                                          my_dict.update({'name': 'Alice', 'city': 'New York'})\n<\/code><\/pre>\n
                                          \u8fd9\u5c06\u540c\u65f6\u6dfb\u52a0 'name'<\/code> \u548c 'city'<\/code> \u4e24\u4e2a\u952e\u53ca\u5176\u5bf9\u5e94\u7684\u503c\u3002<\/p>\n
                                          \u5982\u4f55\u5728Python\u5b57\u5178\u4e2d\u68c0\u67e5\u67d0\u4e2a\u952e\u662f\u5426\u5b58\u5728\uff1f<\/strong>
                                          \u5728\u64cd\u4f5c\u5b57\u5178\u65f6\uff0c\u68c0\u67e5\u67d0\u4e2a\u952e\u662f\u5426\u5b58\u5728\u662f\u5f88\u5e38\u89c1\u7684\u9700\u6c42\u3002\u53ef\u4ee5\u4f7f\u7528 in<\/code> \u5173\u952e\u5b57\u6765\u5b9e\u73b0\u3002\u4f8b\u5982\uff0c\u68c0\u67e5\u5b57\u5178 my_dict<\/code> \u4e2d\u662f\u5426\u5b58\u5728\u952e 'age'<\/code>\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u4ee3\u7801\uff1a  <\/p>\n
                                          if 'age' in my_dict:\n    print("\u952e 'age' \u5b58\u5728")\nelse:\n    print("\u952e 'age' \u4e0d\u5b58\u5728")\n<\/code><\/pre>\n
                                          \u8fd9\u79cd\u65b9\u6cd5\u80fd\u591f\u5e2e\u52a9\u4f60\u907f\u514d\u5728\u6dfb\u52a0\u6216\u66f4\u65b0\u6570\u636e\u65f6\u51fa\u73b0\u7684\u6f5c\u5728\u9519\u8bef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u4e2d\u7ed9\u5b57\u5178\u52a0\u5165\u6570\u636e\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u53ef\u4ee5\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\u3001\u4f7f\u7528update()\u65b9\u6cd5\u3001\u5229\u7528setdefault […]","protected":false},"author":3,"featured_media":1165348,"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\/1165338"}],"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=1165338"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1165338\/revisions"}],"predecessor-version":[{"id":1165350,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1165338\/revisions\/1165350"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1165348"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1165338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1165338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1165338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}