{"id":940680,"date":"2024-12-26T21:06:57","date_gmt":"2024-12-26T13:06:57","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/940680.html"},"modified":"2024-12-26T21:06:59","modified_gmt":"2024-12-26T13:06:59","slug":"%e5%a6%82%e4%bd%95%e9%81%8d%e5%8e%86%e5%ad%97%e5%85%b8-python","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/940680.html","title":{"rendered":"\u5982\u4f55\u904d\u5386\u5b57\u5178 python"},"content":{"rendered":"

\"\u5982\u4f55\u904d\u5386\u5b57\u5178<\/p>\n

\u904d\u5386\u5b57\u5178\u5728Python\u7f16\u7a0b\u4e2d\u662f\u4e00\u4e2a\u975e\u5e38\u5e38\u89c1\u7684\u4efb\u52a1\uff0c\u4e3b\u8981\u6709\u4e09\u79cd\u65b9\u5f0f\uff1a\u901a\u8fc7\u952e\u904d\u5386\u3001\u901a\u8fc7\u503c\u904d\u5386\u3001\u901a\u8fc7\u952e\u503c\u5bf9\u904d\u5386<\/strong>\u3002\u5176\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u662f\u901a\u8fc7\u952e\u503c\u5bf9\u904d\u5386\uff0c\u56e0\u4e3a\u8fd9\u53ef\u4ee5\u540c\u65f6\u83b7\u53d6\u5b57\u5178\u7684\u952e\u548c\u503c\u3002\u4e3a\u4e86\u9ad8\u6548\u5730\u904d\u5386\u5b57\u5178\uff0c\u53ef\u4ee5\u4f7f\u7528Python\u5185\u7f6e\u7684\u5404\u79cd\u65b9\u6cd5\u548c\u51fd\u6570\uff0c\u5982items()<\/code>\u3001keys()<\/code>\u3001values()<\/code>\u7b49\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u8fd9\u51e0\u79cd\u904d\u5386\u5b57\u5178\u7684\u65b9\u6cd5\uff0c\u4ee5\u53ca\u4e00\u4e9b\u9ad8\u7ea7\u6280\u5de7\u548c\u6ce8\u610f\u4e8b\u9879\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u901a\u8fc7\u952e\u904d\u5386<\/p>\n<\/p>\n

\u901a\u8fc7\u952e\u904d\u5386\u5b57\u5178\u662f\u6700\u57fa\u7840\u7684\u904d\u5386\u65b9\u5f0f\u3002\u5728Python\u4e2d\uff0c\u5b57\u5178\u7684\u952e\u662f\u53ef\u54c8\u5e0c\u7684\u5e76\u4e14\u662f\u552f\u4e00\u7684\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528keys()<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u5b57\u5178\u7684\u6240\u6709\u952e\uff0c\u7136\u540e\u8fdb\u884c\u904d\u5386\u3002<\/p>\n<\/p>\n

my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
for key in my_dict.keys():<\/p>\n
    print(f"Key: {key}, Value: {my_dict[key]}")<\/p>\n
<\/code><\/pre>\n<\/p>\n
    \n
  1. \n
    \u4e86\u89e3keys()<\/code>\u65b9\u6cd5<\/strong><\/p>\n<\/p>\n
    keys()<\/code>\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u89c6\u56fe\u5bf9\u8c61\uff0c\u5c55\u793a\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u3002\u867d\u7136\u8fd9\u4e2a\u89c6\u56fe\u5bf9\u8c61\u7c7b\u4f3c\u4e8e\u5217\u8868\uff0c\u4f46\u5b83\u5e76\u4e0d\u662f\u771f\u6b63\u7684\u5217\u8868\u3002\u56e0\u6b64\uff0c\u5982\u679c\u9700\u8981\u8fdb\u884c\u7d22\u5f15\u8bbf\u95ee\u6216\u8005\u5176\u4ed6\u5217\u8868\u64cd\u4f5c\uff0c\u53ef\u4ee5\u5c06\u5176\u8f6c\u6362\u4e3a\u5217\u8868\u3002<\/p>\n<\/p>\n<\/li>\n
  2. \n
    \u76f4\u63a5\u4f7f\u7528\u5b57\u5178\u8fdb\u884c\u904d\u5386<\/strong><\/p>\n<\/p>\n
    \u5728Python\u4e2d\uff0c\u53ef\u4ee5\u76f4\u63a5\u904d\u5386\u5b57\u5178\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\u904d\u5386\u7684\u662f\u5b57\u5178\u7684\u952e\u3002\u8fd9\u79cd\u65b9\u5f0f\u901a\u5e38\u66f4\u7b80\u6d01\u3002<\/p>\n<\/p>\n
    for key in my_dict:<\/p>\n
        print(f"Key: {key}, Value: {my_dict[key]}")<\/p>\n
    <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ol>\n
    \u4e8c\u3001\u901a\u8fc7\u503c\u904d\u5386<\/p>\n<\/p>\n
    \u6709\u65f6\u5019\u6211\u4eec\u53ea\u5173\u5fc3\u5b57\u5178\u4e2d\u7684\u503c\uff0c\u800c\u4e0d\u9700\u8981\u952e\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528values()<\/code>\u65b9\u6cd5\u6765\u8fdb\u884c\u904d\u5386\u3002<\/p>\n<\/p>\n
    my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
    for value in my_dict.values():<\/p>\n
        print(f"Value: {value}")<\/p>\n
    <\/code><\/pre>\n<\/p>\n
      \n
    1. \n
      \u4e86\u89e3values()<\/code>\u65b9\u6cd5<\/strong><\/p>\n<\/p>\n
      values()<\/code>\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u89c6\u56fe\u5bf9\u8c61\uff0c\u5305\u542b\u5b57\u5178\u4e2d\u7684\u6240\u6709\u503c\u3002\u4e0ekeys()<\/code>\u65b9\u6cd5\u7c7b\u4f3c\uff0c\u8fd9\u4e2a\u89c6\u56fe\u5bf9\u8c61\u4e5f\u53ef\u4ee5\u88ab\u8f6c\u6362\u4e3a\u5217\u8868\u3002<\/p>\n<\/p>\n<\/li>\n
    2. \n
      \u5e94\u7528\u573a\u666f<\/strong><\/p>\n<\/p>\n
      \u904d\u5386\u5b57\u5178\u503c\u7684\u573a\u666f\u901a\u5e38\u51fa\u73b0\u5728\u9700\u8981\u5bf9\u503c\u8fdb\u884c\u67d0\u79cd\u64cd\u4f5c\u6216\u8005\u805a\u5408\u8ba1\u7b97\u7684\u65f6\u5019\uff0c\u6bd4\u5982\u8ba1\u7b97\u603b\u548c\u3001\u5e73\u5747\u503c\u7b49\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
      \u4e09\u3001\u901a\u8fc7\u952e\u503c\u5bf9\u904d\u5386<\/p>\n<\/p>\n
      \u901a\u8fc7\u952e\u503c\u5bf9\u904d\u5386\u5b57\u5178\u662f\u6700\u5e38\u7528\u7684\u65b9\u5f0f\uff0c\u56e0\u4e3a\u5b83\u540c\u65f6\u83b7\u53d6\u4e86\u952e\u548c\u503c\u3002items()<\/code>\u65b9\u6cd5\u662f\u5b9e\u73b0\u8fd9\u4e00\u529f\u80fd\u7684\u5173\u952e\u3002<\/p>\n<\/p>\n
      my_dict = {'a': 1, 'b': 2, 'c': 3}<\/p>\n
      for key, value in my_dict.items():<\/p>\n
          print(f"Key: {key}, Value: {value}")<\/p>\n
      <\/code><\/pre>\n<\/p>\n
        \n
      1. \n
        \u4e86\u89e3items()<\/code>\u65b9\u6cd5<\/strong><\/p>\n<\/p>\n
        items()<\/code>\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u89c6\u56fe\u5bf9\u8c61\uff0c\u5176\u4e2d\u5305\u542b\u5b57\u5178\u7684\u952e\u503c\u5bf9\u3002\u6bcf\u4e2a\u952e\u503c\u5bf9\u90fd\u662f\u4e00\u4e2a\u5143\u7ec4\u3002<\/p>\n<\/p>\n<\/li>\n
      2. \n
        \u540c\u65f6\u4fee\u6539\u952e\u548c\u503c<\/strong><\/p>\n<\/p>\n
        \u4f7f\u7528\u952e\u503c\u5bf9\u904d\u5386\u65f6\uff0c\u53ef\u4ee5\u5728\u8fed\u4ee3\u8fc7\u7a0b\u4e2d\u540c\u65f6\u4fee\u6539\u952e\u548c\u503c\u3002\u8fd9\u5728\u9700\u8981\u6839\u636e\u6761\u4ef6\u66f4\u65b0\u5b57\u5178\u65f6\u975e\u5e38\u6709\u7528\u3002<\/p>\n<\/p>\n
        for key, value in my_dict.items():<\/p>\n
            my_dict[key] = value * 2  # \u5c06\u6240\u6709\u503c\u7ffb\u500d<\/p>\n
        <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ol>\n
        \u56db\u3001\u5b57\u5178\u904d\u5386\u7684\u9ad8\u7ea7\u6280\u5de7<\/p>\n<\/p>\n
        \u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u904d\u5386\u5b57\u5178\u65f6\u53ef\u80fd\u8fd8\u9700\u8981\u7ed3\u5408\u5176\u4ed6Python\u7279\u6027\u6765\u63d0\u9ad8\u6548\u7387\u6216\u8005\u5b9e\u73b0\u66f4\u590d\u6742\u7684\u529f\u80fd\u3002<\/p>\n<\/p>\n
          \n
        1. \n
          \u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u5f0f<\/strong><\/p>\n<\/p>\n
          \u5b57\u5178\u63a8\u5bfc\u5f0f\u662f\u4e00\u79cd\u5feb\u901f\u751f\u6210\u5b57\u5178\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u5728\u904d\u5386\u7684\u540c\u65f6\u751f\u6210\u65b0\u7684\u5b57\u5178\u3002<\/p>\n<\/p>\n
          squared_values = {key: value2 for key, value in my_dict.items()}<\/p>\n
          <\/code><\/pre>\n<\/p>\n<\/li>\n
        2. \n
          \u4f7f\u7528enumerate()<\/code>\u51fd\u6570<\/strong><\/p>\n<\/p>\n
          \u867d\u7136enumerate()<\/code>\u51fd\u6570\u4e3b\u8981\u7528\u4e8e\u5217\u8868\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4e5f\u53ef\u4ee5\u4e0e\u5b57\u5178\u7ed3\u5408\u4f7f\u7528\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u8bb0\u5f55\u904d\u5386\u6b21\u6570\u7684\u65f6\u5019\u3002<\/p>\n<\/p>\n
          for index, (key, value) in enumerate(my_dict.items()):<\/p>\n
              print(f"Index: {index}, Key: {key}, Value: {value}")<\/p>\n
          <\/code><\/pre>\n<\/p>\n<\/li>\n
        3. \n
          \u7ed3\u5408\u6761\u4ef6\u8bed\u53e5<\/strong><\/p>\n<\/p>\n
          \u5728\u904d\u5386\u5b57\u5178\u65f6\uff0c\u53ef\u4ee5\u7ed3\u5408\u6761\u4ef6\u8bed\u53e5\u5b9e\u73b0\u5bf9\u7279\u5b9a\u952e\u503c\u5bf9\u7684\u8fc7\u6ee4\u6216\u8005\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
          for key, value in my_dict.items():<\/p>\n
              if value > 1:<\/p>\n
                  print(f"Key: {key} has a value greater than 1")<\/p>\n
          <\/code><\/pre>\n<\/p>\n<\/li>\n<\/ol>\n
          \u4e94\u3001\u6ce8\u610f\u4e8b\u9879<\/p>\n<\/p>\n
          \u5728\u904d\u5386\u5b57\u5178\u65f6\uff0c\u6709\u4e00\u4e9b\u9700\u8981\u7279\u522b\u6ce8\u610f\u7684\u4e8b\u9879\uff0c\u4ee5\u907f\u514d\u51fa\u73b0\u9519\u8bef\u6216\u8005\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<\/p>\n
            \n
          1. \n
            \u907f\u514d\u5728\u904d\u5386\u65f6\u4fee\u6539\u5b57\u5178\u7ed3\u6784<\/strong><\/p>\n<\/p>\n
            \u5728\u904d\u5386\u5b57\u5178\u65f6\u4fee\u6539\u5176\u7ed3\u6784\uff08\u6bd4\u5982\u6dfb\u52a0\u6216\u5220\u9664\u952e\u503c\u5bf9\uff09\u53ef\u80fd\u5bfc\u81f4\u7a0b\u5e8f\u51fa\u9519\u3002\u56e0\u6b64\uff0c\u5728\u9700\u8981\u4fee\u6539\u5b57\u5178\u7ed3\u6784\u65f6\uff0c\u5efa\u8bae\u5148\u5c06\u4fee\u6539\u5185\u5bb9\u5b58\u50a8\u5728\u4e00\u4e2a\u4e34\u65f6\u5217\u8868\u4e2d\uff0c\u7136\u540e\u5728\u904d\u5386\u7ed3\u675f\u540e\u4e00\u6b21\u6027\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n<\/p>\n
            to_delete = []<\/p>\n
            for key in my_dict:<\/p>\n
                if my_dict[key] < 2:<\/p>\n
                    to_delete.append(key)<\/p>\n
            for key in to_delete:<\/p>\n
                del my_dict[key]<\/p>\n
            <\/code><\/pre>\n<\/p>\n<\/li>\n
          2. \n
            \u6ce8\u610f\u5b57\u5178\u7684\u65e0\u5e8f\u6027<\/strong><\/p>\n<\/p>\n
            \u5728Python 3.7\u4e4b\u524d\uff0c\u5b57\u5178\u662f\u65e0\u5e8f\u7684\uff0c\u610f\u5473\u7740\u6bcf\u6b21\u904d\u5386\u7684\u987a\u5e8f\u53ef\u80fd\u4e0d\u540c\u3002\u4ecePython 3.7\u5f00\u59cb\uff0c\u5b57\u5178\u4fdd\u6301\u63d2\u5165\u987a\u5e8f\uff0c\u4f46\u5728\u7f16\u5199\u9700\u8981\u517c\u5bb9\u8f83\u65e9\u7248\u672c\u7684\u4ee3\u7801\u65f6\u4ecd\u9700\u6ce8\u610f\u8fd9\u4e00\u70b9\u3002<\/p>\n<\/p>\n<\/li>\n
          3. \n
            \u6027\u80fd\u8003\u8651<\/strong><\/p>\n<\/p>\n
            \u5bf9\u4e8e\u975e\u5e38\u5927\u7684\u5b57\u5178\uff0c\u904d\u5386\u64cd\u4f5c\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u8003\u8651\u4f7f\u7528\u751f\u6210\u5668\u3001\u5206\u6279\u5904\u7406\u7b49\u65b9\u5f0f\u6765\u4f18\u5316\u6027\u80fd\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
            \u603b\u7ed3\u800c\u8a00\uff0c\u904d\u5386\u5b57\u5178\u662fPython\u7f16\u7a0b\u4e2d\u7684\u57fa\u672c\u64cd\u4f5c\uff0c\u638c\u63e1\u591a\u79cd\u904d\u5386\u65b9\u5f0f\u4ee5\u53ca\u76f8\u5173\u6280\u5de7\u5bf9\u4e8e\u63d0\u9ad8\u4ee3\u7801\u6548\u7387\u548c\u53ef\u8bfb\u6027\u81f3\u5173\u91cd\u8981\u3002\u901a\u8fc7\u7075\u6d3b\u8fd0\u7528keys()<\/code>\u3001values()<\/code>\u3001items()<\/code>\u65b9\u6cd5\uff0c\u4ee5\u53ca\u7ed3\u5408\u5b57\u5178\u63a8\u5bfc\u5f0f\u3001\u6761\u4ef6\u8bed\u53e5\u7b49\u9ad8\u7ea7\u6280\u5de7\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u51b3\u5404\u79cd\u5b57\u5178\u64cd\u4f5c\u95ee\u9898\u3002\u5e0c\u671b\u672c\u6587\u80fd\u4e3a\u60a8\u5728Python\u5b57\u5178\u904d\u5386\u4e2d\u63d0\u4f9b\u6709\u76ca\u7684\u6307\u5bfc\u548c\u5e2e\u52a9\u3002<\/p>\n<\/p>\n
            \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
             \u5982\u4f55\u5728Python\u4e2d\u8bbf\u95ee\u5b57\u5178\u7684\u6240\u6709\u952e\uff1f<\/strong>
            \u5728Python\u4e2d\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528keys()<\/code>\u65b9\u6cd5\u6765\u8bbf\u95ee\u5b57\u5178\u7684\u6240\u6709\u952e\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
            my_dict = {'name': 'Alice', 'age': 25, 'city': 'New York'}\nfor key in my_dict.keys():\n    print(key)\n<\/code><\/pre>\n
            \u8fd9\u6bb5\u4ee3\u7801\u5c06\u8f93\u51fa\u5b57\u5178\u4e2d\u7684\u6240\u6709\u952e\u3002<\/p>\n
            \u600e\u6837\u904d\u5386\u5b57\u5178\u7684\u503c\u800c\u4e0d\u9700\u8981\u952e\uff1f<\/strong>
            \u8981\u904d\u5386\u5b57\u5178\u4e2d\u7684\u503c\uff0c\u53ef\u4ee5\u4f7f\u7528values()<\/code>\u65b9\u6cd5\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a  <\/p>\n
            my_dict = {'name': 'Alice', 'age': 25, 'city': 'New York'}\nfor value in my_dict.values():\n    print(value)\n<\/code><\/pre>\n
            \u6267\u884c\u8fd9\u6bb5\u4ee3\u7801\u5c06\u6253\u5370\u51fa\u5b57\u5178\u4e2d\u6240\u6709\u7684\u503c\u3002<\/p>\n
            \u4f7f\u7528Python\u904d\u5386\u5b57\u5178\u65f6\uff0c\u53ef\u4ee5\u540c\u65f6\u8bbf\u95ee\u952e\u548c\u503c\u5417\uff1f<\/strong>
            \u53ef\u4ee5\u4f7f\u7528items()<\/code>\u65b9\u6cd5\u540c\u65f6\u8bbf\u95ee\u5b57\u5178\u4e2d\u7684\u952e\u548c\u503c\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n
            my_dict = {'name': 'Alice', 'age': 25, 'city': 'New York'}\nfor key, value in my_dict.items():\n    print(f'\u952e: {key}, \u503c: {value}')\n<\/code><\/pre>\n
            \u8fd9\u5c06\u8f93\u51fa\u5b57\u5178\u4e2d\u6bcf\u4e00\u5bf9\u952e\u503c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u904d\u5386\u5b57\u5178\u5728Python\u7f16\u7a0b\u4e2d\u662f\u4e00\u4e2a\u975e\u5e38\u5e38\u89c1\u7684\u4efb\u52a1\uff0c\u4e3b\u8981\u6709\u4e09\u79cd\u65b9\u5f0f\uff1a\u901a\u8fc7\u952e\u904d\u5386\u3001\u901a\u8fc7\u503c\u904d\u5386\u3001\u901a\u8fc7\u952e\u503c\u5bf9\u904d\u5386\u3002\u5176\u4e2d […]","protected":false},"author":3,"featured_media":940682,"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\/940680"}],"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=940680"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/940680\/revisions"}],"predecessor-version":[{"id":940683,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/940680\/revisions\/940683"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/940682"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=940680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=940680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=940680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}