{"id":955004,"date":"2024-12-27T02:07:47","date_gmt":"2024-12-26T18:07:47","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/955004.html"},"modified":"2024-12-27T02:07:50","modified_gmt":"2024-12-26T18:07:50","slug":"python%e5%a6%82%e4%bd%95%e5%a4%8d%e5%88%b6%e7%8b%ac%e7%ab%8b%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/955004.html","title":{"rendered":"python\u5982\u4f55\u590d\u5236\u72ec\u7acb\u53d8\u91cf"},"content":{"rendered":"

\"python\u5982\u4f55\u590d\u5236\u72ec\u7acb\u53d8\u91cf\"<\/p>\n

\u5728Python\u4e2d\u590d\u5236\u72ec\u7acb\u53d8\u91cf\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\u3001\u4f7f\u7528\u5185\u7f6e\u51fd\u6570copy()<\/code>\u548cdeepcopy()<\/code>\u3001\u4ee5\u53ca\u5229\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u548c\u751f\u6210\u5668\u7b49\u65b9\u5f0f\u3002<\/strong>\u5728\u8fd9\u4e9b\u65b9\u6cd5\u4e2d\uff0ccopy()<\/code>\u548cdeepcopy()<\/code>\u51fd\u6570\u662fPython\u6807\u51c6\u5e93\u4e2d\u7684copy<\/code>\u6a21\u5757\u63d0\u4f9b\u7684\uff0c\u4e13\u95e8\u7528\u4e8e\u590d\u5236\u53ef\u53d8\u5bf9\u8c61\u3002\u8d4b\u503c\u8fd0\u7b97\u7b26\u662f\u6700\u7b80\u5355\u7684\u65b9\u5f0f\uff0c\u4f46\u5bf9\u4e8e\u53ef\u53d8\u5bf9\u8c61\u6765\u8bf4\uff0c\u5b83\u53ea\u662f\u521b\u5efa\u4e86\u4e00\u4e2a\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5b9e\u9645\u7684\u590d\u5236\u3002\u4e0b\u9762\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u793a\u4f8b\u548c\u5e94\u7528\u573a\u666f\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u8d4b\u503c\u8fd0\u7b97\u7b26<\/p>\n<\/p>\n

\u8d4b\u503c\u8fd0\u7b97\u7b26\u662f\u590d\u5236\u53d8\u91cf\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\uff0c\u4f46\u5bf9\u4e8e\u53ef\u53d8\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5b57\u5178\u7b49\uff09\uff0c\u5b83\u53ea\u4f1a\u590d\u5236\u5f15\u7528\uff0c\u800c\u4e0d\u662f\u5b9e\u9645\u7684\u6570\u636e\u3002\u5bf9\u4e8e\u4e0d\u53ef\u53d8\u5bf9\u8c61\uff08\u5982\u6574\u6570\u3001\u5b57\u7b26\u4e32\u3001\u5143\u7ec4\u7b49\uff09\uff0c\u8d4b\u503c\u8fd0\u7b97\u7b26\u53ef\u4ee5\u6709\u6548\u5730\u590d\u5236\u53d8\u91cf\u3002<\/p>\n<\/p>\n

    \n
  1. \n

    \u4e0d\u53ef\u53d8\u5bf9\u8c61\u7684\u8d4b\u503c<\/strong><\/p>\n<\/p>\n

    \u4e0d\u53ef\u53d8\u5bf9\u8c61\u5728\u8d4b\u503c\u65f6\u4e0d\u4f1a\u6539\u53d8\u539f\u5bf9\u8c61\uff0c\u56e0\u6b64\u8d4b\u503c\u64cd\u4f5c\u7b49\u540c\u4e8e\u590d\u5236\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n

    x = 10<\/p>\n
    y = x<\/p>\n
    y = 20<\/p>\n
    print(x)  # \u8f93\u51fa: 10<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cx<\/code>\u7684\u503c\u4e0d\u4f1a\u56e0\u4e3ay<\/code>\u7684\u8d4b\u503c\u800c\u6539\u53d8\u3002<\/p>\n<\/p>\n<\/li>\n
  2. \n
    \u53ef\u53d8\u5bf9\u8c61\u7684\u8d4b\u503c<\/strong><\/p>\n<\/p>\n
    \u5bf9\u4e8e\u53ef\u53d8\u5bf9\u8c61\uff0c\u8d4b\u503c\u64cd\u4f5c\u53ea\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5f15\u7528\u6307\u5411\u540c\u4e00\u4e2a\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/p>\n<\/p>\n
    a = [1, 2, 3]<\/p>\n
    b = a<\/p>\n
    b.append(4)<\/p>\n
    print(a)  # \u8f93\u51fa: [1, 2, 3, 4]<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u7531\u4e8ea<\/code>\u548cb<\/code>\u6307\u5411\u540c\u4e00\u4e2a\u5217\u8868\u5bf9\u8c61\uff0c\u4fee\u6539b<\/code>\u4e5f\u4f1a\u5f71\u54cd\u5230a<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
    \u4e8c\u3001\u4f7f\u7528copy()<\/code>\u51fd\u6570<\/p>\n<\/p>\n
    copy()<\/code>\u51fd\u6570\u53ef\u4ee5\u7528\u4e8e\u521b\u5efa\u6d45\u590d\u5236\uff0c\u5373\u590d\u5236\u5bf9\u8c61\u7684\u7b2c\u4e00\u5c42\u6570\u636e\u7ed3\u6784\uff0c\u800c\u4e0d\u590d\u5236\u5d4c\u5957\u7684\u5b50\u5bf9\u8c61\u3002\u5bf9\u4e8e\u5d4c\u5957\u7ed3\u6784\uff0c\u5185\u90e8\u5bf9\u8c61\u4ecd\u7136\u662f\u5171\u4eab\u7684\u3002<\/p>\n<\/p>\n
      \n
    1. \n
      \u6d45\u590d\u5236\u793a\u4f8b<\/strong><\/p>\n<\/p>\n
      import copy<\/p>\n
      a = [1, 2, [3, 4]]<\/p>\n
      b = copy.copy(a)<\/p>\n
      b[2].append(5)<\/p>\n
      print(a)  # \u8f93\u51fa: [1, 2, [3, 4, 5]]<\/p>\n
      print(b)  # \u8f93\u51fa: [1, 2, [3, 4, 5]]<\/p>\n
      <\/code><\/pre>\n<\/p>\n
      \u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cb<\/code>\u662fa<\/code>\u7684\u6d45\u590d\u5236\uff0c\u4fee\u6539b<\/code>\u4e2d\u7684\u5d4c\u5957\u5217\u8868\u4f1a\u5f71\u54cda<\/code>\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
      \u4e09\u3001\u4f7f\u7528deepcopy()<\/code>\u51fd\u6570<\/p>\n<\/p>\n
      deepcopy()<\/code>\u51fd\u6570\u7528\u4e8e\u521b\u5efa\u6df1\u590d\u5236\uff0c\u80fd\u591f\u9012\u5f52\u590d\u5236\u5bf9\u8c61\u53ca\u5176\u5d4c\u5957\u5b50\u5bf9\u8c61\uff0c\u4ece\u800c\u521b\u5efa\u72ec\u7acb\u7684\u526f\u672c\u3002<\/p>\n<\/p>\n
        \n
      1. \n
        \u6df1\u590d\u5236\u793a\u4f8b<\/strong><\/p>\n<\/p>\n
        import copy<\/p>\n
        a = [1, 2, [3, 4]]<\/p>\n
        b = copy.deepcopy(a)<\/p>\n
        b[2].append(5)<\/p>\n
        print(a)  # \u8f93\u51fa: [1, 2, [3, 4]]<\/p>\n
        print(b)  # \u8f93\u51fa: [1, 2, [3, 4, 5]]<\/p>\n
        <\/code><\/pre>\n<\/p>\n
        \u4f7f\u7528deepcopy()<\/code>\u590d\u5236\u540e\uff0cb<\/code>\u7684\u4fee\u6539\u4e0d\u4f1a\u5f71\u54cd\u5230a<\/code>\uff0c\u56e0\u4e3a\u6240\u6709\u5c42\u7ea7\u7684\u6570\u636e\u7ed3\u6784\u90fd\u88ab\u590d\u5236\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
        \u56db\u3001\u5217\u8868\u63a8\u5bfc\u5f0f\u4e0e\u751f\u6210\u5668<\/p>\n<\/p>\n
        \u5bf9\u4e8e\u4e00\u4e9b\u7b80\u5355\u7684\u6570\u636e\u7ed3\u6784\uff0c\u6bd4\u5982\u5217\u8868\uff0c\u4f7f\u7528\u5217\u8868\u63a8\u5bfc\u5f0f\u6216\u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4e5f\u53ef\u4ee5\u6709\u6548\u5730\u5b9e\u73b0\u590d\u5236\u3002<\/p>\n<\/p>\n
          \n
        1. \n
          \u5217\u8868\u63a8\u5bfc\u5f0f<\/strong><\/p>\n<\/p>\n
          a = [1, 2, 3]<\/p>\n
          b = [x for x in a]<\/p>\n
          b.append(4)<\/p>\n
          print(a)  # \u8f93\u51fa: [1, 2, 3]<\/p>\n
          print(b)  # \u8f93\u51fa: [1, 2, 3, 4]<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u8fd9\u79cd\u65b9\u6cd5\u9002\u7528\u4e8e\u4e00\u7ef4\u7684\u5217\u8868\u590d\u5236\uff0c\u751f\u6210\u4e00\u4e2a\u65b0\u7684\u5217\u8868\u5bf9\u8c61\u3002<\/p>\n<\/p>\n<\/li>\n
        2. \n
          \u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/strong><\/p>\n<\/p>\n
          \u751f\u6210\u5668\u8868\u8fbe\u5f0f\u53ef\u4ee5\u7528\u4e8e\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u590d\u5236\uff0c\u4f46\u9700\u8981\u5c06\u5176\u8f6c\u6362\u4e3a\u5217\u8868\u6216\u5176\u4ed6\u53ef\u53d8\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
          a = (1, 2, 3)<\/p>\n
          b = list(x for x in a)<\/p>\n
          b.append(4)<\/p>\n
          print(a)  # \u8f93\u51fa: (1, 2, 3)<\/p>\n
          print(b)  # \u8f93\u51fa: [1, 2, 3, 4]<\/p>\n
          <\/code><\/pre>\n<\/p>\n
          \u751f\u6210\u5668\u8868\u8fbe\u5f0f\u4e0e\u5217\u8868\u63a8\u5bfc\u5f0f\u76f8\u4f3c\uff0c\u53ea\u662f\u5728\u590d\u5236\u65f6\u9700\u8981\u663e\u5f0f\u8f6c\u6362\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n
          \u4e94\u3001\u603b\u7ed3<\/p>\n<\/p>\n
          \u5728Python\u4e2d\u590d\u5236\u72ec\u7acb\u53d8\u91cf\u7684\u65b9\u6cd5\u591a\u79cd\u591a\u6837\uff0c\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\u53d6\u51b3\u4e8e\u6570\u636e\u7ed3\u6784\u7684\u590d\u6742\u6027\u4ee5\u53ca\u590d\u5236\u7684\u6df1\u5ea6\u9700\u6c42\u3002\u5bf9\u4e8e\u7b80\u5355\u3001\u4e0d\u53ef\u53d8\u7684\u6570\u636e\u7c7b\u578b\uff0c\u76f4\u63a5\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\u5373\u53ef\uff1b\u5bf9\u4e8e\u590d\u6742\u7684\u5d4c\u5957\u7ed3\u6784\uff0ccopy()<\/code>\u548cdeepcopy()<\/code>\u63d0\u4f9b\u4e86\u66f4\u5f3a\u5927\u7684\u590d\u5236\u529f\u80fd\u3002\u7406\u89e3\u8fd9\u4e9b\u65b9\u6cd5\u7684\u533a\u522b\u548c\u9002\u7528\u573a\u666f\uff0c\u6709\u52a9\u4e8e\u5728\u5b9e\u9645\u7f16\u7a0b\u4e2d\u66f4\u9ad8\u6548\u5730\u7ba1\u7406\u6570\u636e\u3002<\/p>\n<\/p>\n
          \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
           \u5982\u4f55\u5728Python\u4e2d\u521b\u5efa\u72ec\u7acb\u53d8\u91cf\u7684\u526f\u672c\uff1f<\/strong><\/p>\n
          \u5728Python\u4e2d\uff0c\u590d\u5236\u72ec\u7acb\u53d8\u91cf\u7684\u5e38\u7528\u65b9\u6cd5\u662f\u4f7f\u7528\u8d4b\u503c\u64cd\u4f5c\u7b26\u3002\u7b80\u5355\u7684\u8d4b\u503c\u4f1a\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u5f15\u7528\uff0c\u800c\u975e\u771f\u6b63\u7684\u526f\u672c\u3002\u5982\u679c\u60f3\u8981\u521b\u5efa\u4e00\u4e2a\u72ec\u7acb\u7684\u526f\u672c\uff0c\u53ef\u4ee5\u4f7f\u7528copy<\/code>\u6a21\u5757\u4e2d\u7684copy()<\/code>\u51fd\u6570\u6216deepcopy()<\/code>\u51fd\u6570\uff0c\u5177\u4f53\u53d6\u51b3\u4e8e\u53d8\u91cf\u7684\u590d\u6742\u6027\u3002\u4f8b\u5982\uff0ccopy()<\/code>\u9002\u7528\u4e8e\u7b80\u5355\u6570\u636e\u7ed3\u6784\uff0c\u800cdeepcopy()<\/code>\u9002\u7528\u4e8e\u5d4c\u5957\u5bf9\u8c61\u3002<\/p>\n
          \u5728\u5904\u7406\u5217\u8868\u6216\u5b57\u5178\u65f6\uff0c\u5982\u4f55\u786e\u4fdd\u590d\u5236\u7684\u662f\u72ec\u7acb\u526f\u672c\uff1f<\/strong><\/p>\n
          \u5bf9\u4e8e\u5217\u8868\u548c\u5b57\u5178\u8fd9\u6837\u7684\u53ef\u53d8\u5bf9\u8c61\uff0c\u4f7f\u7528\u5207\u7247\u6216copy()<\/code>\u65b9\u6cd5\u53ef\u4ee5\u5b9e\u73b0\u72ec\u7acb\u590d\u5236\u3002\u4f8b\u5982\uff0c\u5bf9\u4e8e\u5217\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528list.copy()<\/code>\u6216new_list = old_list[:]<\/code>\u6765\u521b\u5efa\u526f\u672c\u3002\u5b57\u5178\u5219\u53ef\u4ee5\u901a\u8fc7new_dict = old_dict.copy()<\/code>\u6765\u590d\u5236\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8fd9\u4e9b\u65b9\u6cd5\u53ea\u4f1a\u590d\u5236\u6700\u5916\u5c42\u7684\u5bf9\u8c61\uff0c\u82e5\u5185\u90e8\u8fd8\u6709\u53ef\u53d8\u5bf9\u8c61\uff0c\u4ecd\u7136\u9700\u8981\u4f7f\u7528deepcopy()<\/code>\u3002<\/p>\n
          \u590d\u5236\u53d8\u91cf\u65f6\uff0c\u6709\u54ea\u4e9b\u5e38\u89c1\u7684\u9519\u8bef\u9700\u8981\u907f\u514d\uff1f<\/strong><\/p>\n
          \u5728\u590d\u5236\u53d8\u91cf\u65f6\uff0c\u5e38\u89c1\u7684\u9519\u8bef\u5305\u62ec\u5bf9\u53ef\u53d8\u5bf9\u8c61\u7684\u6d45\u590d\u5236\uff08\u5982\u4f7f\u7528\u7b80\u5355\u8d4b\u503c\uff09\uff0c\u8fd9\u4f1a\u5bfc\u81f4\u539f\u59cb\u5bf9\u8c61\u548c\u526f\u672c\u6307\u5411\u540c\u4e00\u5185\u5b58\u5730\u5740\uff0c\u4fee\u6539\u4e00\u65b9\u5c06\u5f71\u54cd\u53e6\u4e00\u65b9\u3002\u6b64\u5916\uff0c\u672a\u610f\u8bc6\u5230\u5d4c\u5957\u5bf9\u8c61\u7684\u5f71\u54cd\u4e5f\u662f\u4e00\u4e2a\u95ee\u9898\uff0c\u4f7f\u7528deepcopy()<\/code>\u53ef\u4ee5\u907f\u514d\u8fd9\u79cd\u60c5\u51b5\u3002\u52a1\u5fc5\u5728\u590d\u5236\u524d\u786e\u8ba4\u5bf9\u8c61\u7684\u7c7b\u578b\u548c\u7ed3\u6784\uff0c\u4ee5\u9009\u62e9\u9002\u5f53\u7684\u590d\u5236\u65b9\u6cd5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u590d\u5236\u72ec\u7acb\u53d8\u91cf\u7684\u65b9\u6cd5\u5305\u62ec\u4f7f\u7528\u8d4b\u503c\u8fd0\u7b97\u7b26\u3001\u4f7f\u7528\u5185\u7f6e\u51fd\u6570copy()\u548cdeepcopy()\u3001\u4ee5\u53ca\u5229\u7528 […]","protected":false},"author":3,"featured_media":955017,"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\/955004"}],"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=955004"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/955004\/revisions"}],"predecessor-version":[{"id":955018,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/955004\/revisions\/955018"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/955017"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=955004"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=955004"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=955004"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}