{"id":1071307,"date":"2025-01-08T11:06:10","date_gmt":"2025-01-08T03:06:10","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1071307.html"},"modified":"2025-01-08T11:06:12","modified_gmt":"2025-01-08T03:06:12","slug":"python%e4%b8%ad%e5%a6%82%e4%bd%95%e5%88%a4%e6%96%ad%e5%85%b6%e6%98%af%e4%b8%8d%e6%98%af%e5%88%97%e8%a1%a8-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1071307.html","title":{"rendered":"python\u4e2d\u5982\u4f55\u5224\u65ad\u5176\u662f\u4e0d\u662f\u5217\u8868"},"content":{"rendered":"

\"python\u4e2d\u5982\u4f55\u5224\u65ad\u5176\u662f\u4e0d\u662f\u5217\u8868\"<\/p>\n

\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u6765\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u5217\u8868<\/strong>\uff0c\u5176\u4e2d\u5305\u62ec\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()\u3001\u5185\u7f6e\u51fd\u6570isinstance()\u3001\u4ee5\u53cacollections\u6a21\u5757\u4e2d\u7684Abstract Base Classes (ABCs)\u3002\u4e0b\u9762\u5c06\u8be6\u7ec6\u4ecb\u7ecd\u5176\u4e2d\u4e00\u79cd\u65b9\u6cd5\uff1a\u4f7f\u7528\u5185\u7f6e\u51fd\u6570isinstance()\u6765\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u5217\u8868<\/strong>\u3002<\/p>\n<\/p>\n

\u4f7f\u7528isinstance()<\/strong>\uff1a\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u68c0\u6d4b\u5bf9\u8c61\u662f\u5426\u662f\u67d0\u79cd\u7c7b\u578b\u3002isinstance()\u51fd\u6570\u53ef\u4ee5\u63a5\u53d7\u4e24\u4e2a\u53c2\u6570\uff1a\u7b2c\u4e00\u4e2a\u662f\u5bf9\u8c61\uff0c\u7b2c\u4e8c\u4e2a\u662f\u7c7b\u578b\u3002\u5982\u679c\u5bf9\u8c61\u662f\u8be5\u7c7b\u578b\uff0c\u5219\u8fd4\u56deTrue\uff0c\u5426\u5219\u8fd4\u56deFalse\u3002isinstance()\u662f\u63a8\u8350\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u5b83\u652f\u6301\u7ee7\u627f\u5173\u7cfb\u3002<\/p>\n<\/p>\n

\u4e00\u3001isinstance()\u51fd\u6570<\/p>\n<\/p>\n

isinstance()\u51fd\u6570\u662fPython\u4e2d\u5224\u65ad\u7c7b\u578b\u7684\u4e00\u79cd\u5e38\u7528\u65b9\u6cd5\u3002\u5b83\u7684\u4f18\u52bf\u5728\u4e8e\u53ef\u4ee5\u68c0\u6d4b\u5bf9\u8c61\u662f\u5426\u662f\u67d0\u4e2a\u7c7b\u6216\u5176\u5b50\u7c7b\u7684\u5b9e\u4f8b\uff0c\u56e0\u6b64\u5b83\u66f4\u4e3a\u7075\u6d3b\u3002<\/p>\n<\/p>\n

my_list = [1, 2, 3, 4]<\/p>\n
if isinstance(my_list, list):<\/p>\n
    print("my_list \u662f\u4e00\u4e2a\u5217\u8868")<\/p>\n
else:<\/p>\n
    print("my_list \u4e0d\u662f\u4e00\u4e2a\u5217\u8868")<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0cisinstance()\u51fd\u6570\u7528\u4e8e\u5224\u65ad\u53d8\u91cfmy_list\u662f\u5426\u662flist\u7c7b\u578b\u3002\u5982\u679c\u662f\uff0c\u5219\u8f93\u51fa"my_list \u662f\u4e00\u4e2a\u5217\u8868"\u3002<\/p>\n<\/p>\n
isinstance()\u51fd\u6570\u7684\u4f18\u70b9\uff1a<\/p>\n<\/p>\n
    \n
  1. \u652f\u6301\u7ee7\u627f\u5173\u7cfb<\/strong>\uff1a\u5982\u679c\u4e00\u4e2a\u7c7b\u662f\u53e6\u4e00\u4e2a\u7c7b\u7684\u5b50\u7c7b\uff0c\u90a3\u4e48isinstance()\u51fd\u6570\u4e5f\u80fd\u6b63\u786e\u5224\u65ad\u3002<\/li>\n
  2. \u7b80\u6d01\u660e\u4e86<\/strong>\uff1a\u4ee3\u7801\u7b80\u6d01\uff0c\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/li>\n<\/ol>\n
    \u4e8c\u3001type()\u51fd\u6570<\/p>\n<\/p>\n
    type()\u51fd\u6570\u4e5f\u662f\u4e00\u79cd\u5224\u65ad\u7c7b\u578b\u7684\u65b9\u6cd5\uff0c\u4f46\u76f8\u6bd4\u4e8eisinstance()\uff0c\u5b83\u7684\u7075\u6d3b\u6027\u7a0d\u5dee\u3002type()\u51fd\u6570\u4ec5\u5728\u5bf9\u8c61\u7c7b\u578b\u5b8c\u5168\u5339\u914d\u65f6\u8fd4\u56deTrue\u3002<\/p>\n<\/p>\n
    my_list = [1, 2, 3, 4]<\/p>\n
    if type(my_list) == list:<\/p>\n
        print("my_list \u662f\u4e00\u4e2a\u5217\u8868")<\/p>\n
    else:<\/p>\n
        print("my_list \u4e0d\u662f\u4e00\u4e2a\u5217\u8868")<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0ctype()\u51fd\u6570\u7528\u4e8e\u5224\u65ad\u53d8\u91cfmy_list\u7684\u7c7b\u578b\u662f\u5426\u7b49\u4e8elist\u3002\u5982\u679c\u662f\uff0c\u5219\u8f93\u51fa"my_list \u662f\u4e00\u4e2a\u5217\u8868"\u3002<\/p>\n<\/p>\n
    \u4f7f\u7528type()\u51fd\u6570\u7684\u7f3a\u70b9\u662f\u5b83\u4e0d\u652f\u6301\u7ee7\u627f\u5173\u7cfb\uff0c\u4f8b\u5982\uff0c\u5982\u679c\u4e00\u4e2a\u7c7b\u7ee7\u627f\u81ealist\uff0c\u90a3\u4e48type()\u51fd\u6570\u5c06\u65e0\u6cd5\u6b63\u786e\u5224\u65ad\u3002<\/p>\n<\/p>\n
    \u4e09\u3001Abstract Base Classes (ABCs)<\/p>\n<\/p>\n
    Python\u7684collections\u6a21\u5757\u4e2d\u63d0\u4f9b\u4e86\u4e00\u4e9b\u62bd\u8c61\u57fa\u7c7b\uff0c\u53ef\u4ee5\u7528\u4e8e\u66f4\u9ad8\u7ea7\u7684\u7c7b\u578b\u5224\u65ad\u3002\u8981\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u5217\u8868\uff0c\u53ef\u4ee5\u4f7f\u7528collections.abc\u6a21\u5757\u4e2d\u7684Sequence\u3002<\/p>\n<\/p>\n
    from collections.abc import Sequence<\/p>\n
    my_list = [1, 2, 3, 4]<\/p>\n
    if isinstance(my_list, Sequence):<\/p>\n
        print("my_list \u662f\u4e00\u4e2a\u5e8f\u5217")<\/p>\n
    else:<\/p>\n
        print("my_list \u4e0d\u662f\u4e00\u4e2a\u5e8f\u5217")<\/p>\n
    <\/code><\/pre>\n<\/p>\n
    \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0cisinstance()\u51fd\u6570\u7528\u4e8e\u5224\u65ad\u53d8\u91cfmy_list\u662f\u5426\u662fSequence\u7c7b\u578b\u3002\u7531\u4e8elist\u662fSequence\u7684\u5b50\u7c7b\uff0c\u56e0\u6b64\u8f93\u51fa"my_list \u662f\u4e00\u4e2a\u5e8f\u5217"\u3002<\/p>\n<\/p>\n
    \u4f7f\u7528Abstract Base Classes\u7684\u4f18\u70b9\uff1a<\/p>\n<\/p>\n
      \n
    1. \u66f4\u5e7f\u6cdb\u7684\u5224\u65ad<\/strong>\uff1a\u53ef\u4ee5\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u662f\u67d0\u4e2a\u62bd\u8c61\u57fa\u7c7b\u7684\u5b9e\u4f8b\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u5177\u4f53\u7c7b\u7684\u5b9e\u4f8b\u3002<\/li>\n
    2. \u4ee3\u7801\u66f4\u5177\u53ef\u8bfb\u6027<\/strong>\uff1a\u4f7f\u7528\u62bd\u8c61\u57fa\u7c7b\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u5177\u53ef\u8bfb\u6027\uff0c\u56e0\u4e3a\u5b83\u660e\u786e\u4e86\u5bf9\u8c61\u5e94\u8be5\u5177\u5907\u7684\u884c\u4e3a\u7279\u5f81\u3002<\/li>\n<\/ol>\n
      \u56db\u3001\u603b\u7ed3<\/p>\n<\/p>\n
      \u5728Python\u4e2d\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u5217\u8868\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5176\u4e2d\u5e38\u7528\u7684\u662fisinstance()\u51fd\u6570\u3002\u8fd9\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u652f\u6301\u7b80\u5355\u7684\u7c7b\u578b\u5224\u65ad\uff0c\u8fd8\u652f\u6301\u7ee7\u627f\u5173\u7cfb\uff0c\u56e0\u6b64\u66f4\u52a0\u7075\u6d3b\u548c\u63a8\u8350\u4f7f\u7528\u3002type()\u51fd\u6570\u867d\u7136\u4e5f\u53ef\u4ee5\u7528\u4e8e\u7c7b\u578b\u5224\u65ad\uff0c\u4f46\u5176\u5c40\u9650\u6027\u8f83\u5927\uff0c\u4e3b\u8981\u9002\u7528\u4e8e\u7b80\u5355\u7684\u7c7b\u578b\u5339\u914d\u3002\u5982\u679c\u9700\u8981\u66f4\u9ad8\u7ea7\u7684\u7c7b\u578b\u5224\u65ad\uff0c\u53ef\u4ee5\u4f7f\u7528Abstract Base Classes (ABCs)\uff0c\u4f8b\u5982collections.abc\u6a21\u5757\u4e2d\u7684Sequence\u3002<\/p>\n<\/p>\n
      \u65e0\u8bba\u4f7f\u7528\u54ea\u79cd\u65b9\u6cd5\uff0c\u90fd\u9700\u8981\u6839\u636e\u5177\u4f53\u7684\u5e94\u7528\u573a\u666f\u548c\u9700\u6c42\u6765\u9009\u62e9\u5408\u9002\u7684\u5de5\u5177\u3002\u901a\u8fc7\u5408\u7406\u8fd0\u7528\u8fd9\u4e9b\u65b9\u6cd5\uff0c\u53ef\u4ee5\u7f16\u5199\u51fa\u66f4\u52a0\u5065\u58ee\u548c\u7075\u6d3b\u7684Python\u4ee3\u7801\u3002<\/p>\n<\/p>\n
      \u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
       \u5728Python\u4e2d\uff0c\u5982\u4f55\u68c0\u67e5\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u4e3a\u5217\u8868\uff1f<\/strong>
      \u60a8\u53ef\u4ee5\u4f7f\u7528\u5185\u7f6e\u7684isinstance()<\/code>\u51fd\u6570\u6765\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u4e3a\u5217\u8868\u3002\u6bd4\u5982\uff0cisinstance(obj, list)<\/code>\u5c06\u8fd4\u56deTrue<\/code>\u5982\u679cobj<\/code>\u662f\u4e00\u4e2a\u5217\u8868\uff0c\u5426\u5219\u8fd4\u56deFalse<\/code>\u3002\u8fd9\u79cd\u65b9\u6cd5\u7b80\u6d01\u800c\u76f4\u89c2\uff0c\u9002\u7528\u4e8e\u5404\u79cd\u60c5\u51b5\u4e0b\u7684\u7c7b\u578b\u68c0\u67e5\u3002<\/p>\n
      \u5728Python\u4e2d\uff0c\u5224\u65ad\u5217\u8868\u7684\u5e38\u89c1\u573a\u666f\u6709\u54ea\u4e9b\uff1f<\/strong>
      \u5e38\u89c1\u7684\u573a\u666f\u5305\u62ec\u5728\u5904\u7406\u51fd\u6570\u53c2\u6570\u65f6\uff0c\u9700\u8981\u786e\u4fdd\u4f20\u5165\u7684\u53c2\u6570\u662f\u5217\u8868\u7c7b\u578b\uff0c\u4ee5\u4fbf\u8fdb\u884c\u76f8\u5e94\u7684\u64cd\u4f5c\u3002\u6b64\u5916\uff0c\u5728\u6570\u636e\u5904\u7406\u6216\u6570\u636e\u6e05\u6d17\u7684\u8fc7\u7a0b\u4e2d\uff0c\u786e\u4fdd\u6570\u636e\u7ed3\u6784\u7684\u6b63\u786e\u6027\u4e5f\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u901a\u8fc7\u7c7b\u578b\u5224\u65ad\uff0c\u60a8\u53ef\u4ee5\u907f\u514d\u56e0\u7c7b\u578b\u4e0d\u5339\u914d\u5bfc\u81f4\u7684\u9519\u8bef\u3002<\/p>\n
      \u5982\u679c\u6211\u60f3\u8981\u5224\u65ad\u4e00\u4e2a\u53d8\u91cf\u7684\u7c7b\u578b\uff0c\u5e76\u4e14\u5904\u7406\u5176\u4ed6\u7c7b\u578b\u7684\u60c5\u51b5\uff0c\u8be5\u600e\u4e48\u505a\uff1f<\/strong>
      \u9664\u4e86\u4f7f\u7528isinstance()<\/code>\u51fd\u6570\uff0c\u60a8\u8fd8\u53ef\u4ee5\u7ed3\u5408try-except<\/code>\u8bed\u53e5\u6765\u5904\u7406\u4e0d\u540c\u7c7b\u578b\u7684\u60c5\u51b5\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u4ee5\u5c1d\u8bd5\u5bf9\u53d8\u91cf\u8fdb\u884c\u5217\u8868\u7279\u6709\u7684\u64cd\u4f5c\uff0c\u5982\u679c\u5931\u8d25\uff0c\u5219\u6355\u83b7\u5f02\u5e38\u5e76\u8fdb\u884c\u76f8\u5e94\u7684\u5904\u7406\u3002\u8fd9\u79cd\u65b9\u6cd5\u53ef\u4ee5\u4f7f\u4ee3\u7801\u66f4\u52a0\u5065\u58ee\uff0c\u80fd\u591f\u5e94\u5bf9\u5404\u79cd\u8f93\u5165\u7c7b\u578b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7\u591a\u79cd\u65b9\u6cd5\u6765\u5224\u65ad\u4e00\u4e2a\u5bf9\u8c61\u662f\u5426\u662f\u5217\u8868\uff0c\u5176\u4e2d\u5305\u62ec\u4f7f\u7528\u5185\u7f6e\u51fd\u6570type()\u3001\u5185\u7f6e\u51fd\u6570isin […]","protected":false},"author":3,"featured_media":1071315,"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\/1071307"}],"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=1071307"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1071307\/revisions"}],"predecessor-version":[{"id":1071317,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1071307\/revisions\/1071317"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1071315"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1071307"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1071307"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1071307"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}