{"id":179109,"date":"2024-05-08T20:06:07","date_gmt":"2024-05-08T12:06:07","guid":{"rendered":""},"modified":"2024-05-08T20:06:19","modified_gmt":"2024-05-08T12:06:19","slug":"python%e7%9a%84%e8%bf%ad%e4%bb%a3%e5%99%a8%e4%b8%ba%e4%bb%80%e4%b9%88%e4%b8%80%e5%ae%9a%e8%a6%81%e5%ae%9e%e7%8e%b0__iter__%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/179109.html","title":{"rendered":"python\u7684\u8fed\u4ee3\u5668\u4e3a\u4ec0\u4e48\u4e00\u5b9a\u8981\u5b9e\u73b0__iter__\u65b9\u6cd5"},"content":{"rendered":"

\"python\u7684\u8fed\u4ee3\u5668\u4e3a\u4ec0\u4e48\u4e00\u5b9a\u8981\u5b9e\u73b0__iter__\u65b9\u6cd5\"<\/p>\n

Python\u7684\u8fed\u4ee3\u5668\u4e4b\u6240\u4ee5\u4e00\u5b9a\u8981\u5b9e\u73b0__iter__<\/code>\u65b9\u6cd5\uff0c\u662f\u56e0\u4e3a\u8fd9\u662f\u4f7f\u5bf9\u8c61\u53ef\u8fed\u4ee3\u7684\u57fa\u7840\uff0c\u786e\u4fdd\u5bf9\u8c61\u4e0d\u4ec5\u53ef\u4ee5\u8fdb\u884c\u8fed\u4ee3\u64cd\u4f5c\uff0c\u4e5f\u652f\u6301\u8fed\u4ee3\u534f\u8bae<\/strong>\u3002__iter__<\/code>\u65b9\u6cd5\u8fd4\u56de\u8fed\u4ee3\u5668\u672c\u8eab\uff0c\u800c__next__<\/code>\u65b9\u6cd5\u5219\u7528\u4e8e\u83b7\u53d6\u5e8f\u5217\u4e2d\u7684\u4e0b\u4e00\u4e2a\u5143\u7d20\uff0c\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u5171\u540c\u5b9a\u4e49\u4e86\u8fed\u4ee3\u5668\u7684\u884c\u4e3a\u3002\u5728Python\u4e2d\uff0c\u652f\u6301\u8fed\u4ee3\u5668\u534f\u8bae\u610f\u5473\u7740\u5bf9\u8c61\u53ef\u4ee5\u5728\u5982for\u5faa\u73af\u3001sum\u3001map\u7b49\u573a\u666f\u4e2d\u88ab\u4f7f\u7528<\/strong>\uff0c\u8fd9\u6781\u5927\u5730\u589e\u5f3a\u4e86\u8bed\u8a00\u7684\u7075\u6d3b\u6027\u548c\u8868\u8fbe\u529b\u3002<\/p>\n<\/p>\n

__iter__<\/code>\u65b9\u6cd5\u7684\u5b9e\u73b0\u8ba9\u5bf9\u8c61\u4e0e\u8fed\u4ee3\u5668\u4e4b\u95f4\u7684\u754c\u9650\u66f4\u52a0\u660e\u786e\u3002\u5177\u4f53\u800c\u8a00\uff0c\u4efb\u4f55\u5b9e\u73b0\u4e86__iter__<\/code>\u65b9\u6cd5\u7684\u5bf9\u8c61\u90fd\u53ef\u88ab\u79f0\u4e3a\u53ef\u8fed\u4ee3\u7684(iterable)<\/strong>\uff0c\u800c\u8fed\u4ee3\u5668(iterator)\u5219\u662f\u6307\u540c\u65f6\u5b9a\u4e49\u4e86__iter__<\/code>\u548c__next__<\/code>\u65b9\u6cd5\u7684\u5bf9\u8c61\u3002\u8fd9\u79cd\u8bbe\u8ba1\u5141\u8bb8Python\u4e2d\u7684\u8fed\u4ee3\u64cd\u4f5c\u66f4\u52a0\u62bd\u8c61\u548c\u7edf\u4e00\uff0c\u56e0\u4e3a\u53ea\u8981\u5bf9\u8c61\u9075\u5b88\u4e86\u8fed\u4ee3\u534f\u8bae\uff0c\u5c31\u53ef\u4ee5\u5728\u4efb\u4f55\u9700\u8981\u8fed\u4ee3\u7684\u573a\u5408\u4e2d\u4f7f\u7528<\/strong>\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u8fed\u4ee3\u5668\u7684\u57fa\u672c\u6982\u5ff5<\/h3>\n<\/p>\n

\u8fed\u4ee3\u5668\u662f\u4e00\u79cd\u8bbf\u95ee\u96c6\u5408\u5143\u7d20\u7684\u65b9\u5f0f\uff0c\u7279\u522b\u662f\u5728\u4e0d\u9700\u8981\u66b4\u9732\u5e95\u5c42\u6570\u636e\u8868\u793a\u7684\u60c5\u51b5\u4e0b\u3002\u5b83\u4e3b\u8981\u6709\u4e24\u4e2a\u57fa\u672c\u65b9\u6cd5\uff1a__iter__()<\/code>\u548c__next__()<\/code>\u3002__iter__()<\/code>\u65b9\u6cd5\u8fd4\u56de\u8fed\u4ee3\u5668\u5bf9\u8c61\u672c\u8eab\u3002\u8fd9\u5728Python\u4e2d\u7279\u522b\u6709\u7528\uff0c\u4f7f\u5f97\u8fed\u4ee3\u5668\u53ef\u4ee5\u4f7f\u7528for\u5faa\u73af\u548c\u5176\u4ed6\u8fed\u4ee3\u73af\u5883<\/strong>\u3002\u901a\u8fc7\u5b9e\u73b0__iter__<\/code>\u65b9\u6cd5\uff0c\u5bf9\u8c61\u8868\u660e\u81ea\u5df1\u652f\u6301\u8fed\u4ee3\uff0c\u53ef\u4ee5\u4e00\u6b21\u8fd4\u56de\u4e00\u4e2a\u5143\u7d20\u3002\u8fd9\u79cd\u65b9\u5f0f\u5bf9\u5904\u7406\u5927\u578b\u6570\u636e\u96c6\u6216\u65e0\u6cd5\u4e00\u6b21\u6027\u8f7d\u5165\u5185\u5b58\u7684\u6570\u636e\u5c24\u5176\u91cd\u8981\u3002<\/p>\n<\/p>\n

\u8fed\u4ee3\u5668\u7684\u53e6\u4e00\u4e2a\u5173\u952e\u65b9\u6cd5\u662f__next__()<\/code>\uff0c\u5b83\u5141\u8bb8\u8fed\u4ee3\u5668\u9010\u4e2a\u8fd4\u56de\u96c6\u5408\u4e2d\u7684\u5143\u7d20\u3002\u5f53\u6ca1\u6709\u66f4\u591a\u5143\u7d20\u65f6\uff0c\u8fed\u4ee3\u5668\u5e94\u629b\u51fa\u4e00\u4e2aStopIteration\u5f02\u5e38\uff0c\u901a\u77e5\u8fed\u4ee3\u73af\u5883\u8fed\u4ee3\u5df2\u5b8c\u6210\u3002\u8fd9\u79cd\u673a\u5236\u7b80\u5316\u4e86\u5faa\u73af\u548c\u8fed\u4ee3\u7684\u7ba1\u7406\uff0c\u5141\u8bb8\u5f00\u53d1\u8005\u96c6\u4e2d\u5728\u4e1a\u52a1\u903b\u8f91\u4e0a\uff0c\u800c\u4e0d\u662f\u904d\u5386\u7684\u7ec6\u8282\u4e0a\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u4e3a\u4f55\u5b9e\u73b0__iter__<\/code>\u65b9\u6cd5<\/h3>\n<\/p>\n

\u5b9e\u73b0__iter__<\/code>\u65b9\u6cd5\u662f\u81f3\u5173\u91cd\u8981\u7684\uff0c\u56e0\u4e3a\u8fd9\u662f\u5bf9\u8c61\u53c2\u4e0e\u8fed\u4ee3\u534f\u8bae\u7684\u6807\u5fd7\u3002\u6ca1\u6709\u8fd9\u4e00\u65b9\u6cd5\uff0c\u5bf9\u8c61\u5373\u4f7f\u5b9e\u73b0\u4e86__next__<\/code>\uff0c\u4e5f\u4e0d\u80fd\u5728for\u5faa\u73af\u7b49\u8fed\u4ee3\u573a\u666f\u4e2d\u88ab\u76f4\u63a5\u4f7f\u7528\u3002\u901a\u8fc7__iter__<\/code>\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2a\u8fed\u4ee3\u5668\uff0c\u5bf9\u8c61\u58f0\u660e\u81ea\u8eab\u652f\u6301\u8fed\u4ee3\uff0c\u589e\u52a0\u4e86\u5176\u7075\u6d3b\u6027\u548c\u5b9e\u7528\u6027<\/strong>\u3002\u6b64\u5916\uff0c\u5f53\u5bf9\u8c61\u672c\u8eab\u5373\u662f\u8fed\u4ee3\u5668\u65f6\uff0c__iter__<\/code>\u53ef\u4ee5\u8fd4\u56deself<\/code>\uff0c\u8fd9\u6837\u5bf9\u8c61\u5373\u6ee1\u8db3\u4e86\u8fed\u4ee3\u5668\u7684\u5b9a\u4e49\uff0c\u4e5f\u4fdd\u6301\u4e86\u5bf9\u8fed\u4ee3\u534f\u8bae\u7684\u652f\u6301\u3002<\/p>\n<\/p>\n

\u5728\u8bbe\u8ba1\u53ef\u8fed\u4ee3\u5bf9\u8c61\u65f6\uff0c__iter__<\/code>\u65b9\u6cd5\u7684\u5b58\u5728\u4f7f\u5f97\u5bf9\u8c61\u53ef\u4ee5\u8f7b\u677e\u5730\u88ab\u96c6\u6210\u5230Python\u7684\u8fed\u4ee3\u73af\u5883\u4e2d\u3002\u4f8b\u5982\uff0c\u5728\u5904\u7406\u81ea\u5b9a\u4e49\u6570\u636e\u7ed3\u6784\u3001\u6587\u4ef6\u6216\u751f\u6210\u5668\u65f6\uff0c\u53ea\u8981\u8fd9\u4e9b\u5bf9\u8c61\u9075\u5faa\u4e86\u8fed\u4ee3\u534f\u8bae\uff0c\u5c31\u80fd\u4e0ePython\u7684\u5185\u7f6e\u51fd\u6570\u548c\u7ed3\u6784\u65e0\u7f1d\u5de5\u4f5c\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u5b9e\u73b0\u8fed\u4ee3\u5668\u7684\u4f18\u52bf<\/h3>\n<\/p>\n

\u5b9e\u73b0\u8fed\u4ee3\u5668\u6a21\u5f0f\u4e3aPython\u7a0b\u5e8f\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\u548c\u8868\u73b0\u529b\u3002\u9996\u5148\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u6807\u51c6\u7684\u65b9\u6cd5\u6765\u904d\u5386\u5404\u79cd\u7c7b\u578b\u7684\u6570\u636e<\/strong>\uff0c\u800c\u4e0d\u5fc5\u5173\u5fc3\u6570\u636e\u7684\u5185\u90e8\u6784\u9020\u3002\u5176\u6b21\uff0c\u8fed\u4ee3\u5668\u5bf9\u5185\u5b58\u6548\u7387\u6709\u663e\u8457\u5f71\u54cd\uff0c\u7279\u522b\u662f\u5f53\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\u65f6\u3002\u8fed\u4ee3\u5668\u5141\u8bb8\u9010\u9879\u5904\u7406\u6570\u636e\uff0c\u4e0d\u9700\u8981\u4e00\u6b21\u6027\u5c06\u6574\u4e2a\u6570\u636e\u96c6\u52a0\u8f7d\u5230\u5185\u5b58\u4e2d<\/strong>\u3002<\/p>\n<\/p>\n

\u6b64\u5916\uff0c\u8fed\u4ee3\u5668\u6a21\u5f0f\u8fd8\u652f\u6301\u61d2\u52a0\u8f7d\uff0c\u5373\u53ea\u5728\u9700\u8981\u65f6\u624d\u52a0\u8f7d\u6216\u8ba1\u7b97\u6570\u636e\u3002\u8fd9\u5bf9\u4e8e\u5904\u7406\u65e0\u9650\u6570\u636e\u96c6\u6216\u6602\u8d35\u7684\u8ba1\u7b97\u64cd\u4f5c\u5c24\u5176\u6709\u7528\u3002\u61d2\u52a0\u8f7d\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u548c\u54cd\u5e94\u6027<\/strong>\uff0c\u5141\u8bb8\u521b\u5efa\u9ad8\u6548\u4e14\u53ef\u6269\u5c55\u7684Python\u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n<\/p>\n

\u56db\u3001\u8fed\u4ee3\u5668\u7684\u5b9e\u9645\u5e94\u7528<\/h3>\n<\/p>\n

\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u8fed\u4ee3\u5668\u6a21\u5f0f\u80fd\u591f\u7b80\u5316\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u6d41\u7a0b\u3002\u4ece\u6587\u4ef6\u8bfb\u53d6\u3001\u7f51\u7edc\u8bf7\u6c42\u5904\u7406\u5230\u6570\u636e\u5206\u6790\u4e0e\u8f6c\u6362\uff0c\u8fed\u4ee3\u5668\u90fd\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\u3002\u4f8b\u5982\uff0cPython\u7684\u6587\u4ef6\u5bf9\u8c61\u5c31\u662f\u8fed\u4ee3\u5668\uff0c\u5b83\u4eec\u6309\u884c\u8fd4\u56de\u6587\u4ef6\u5185\u5bb9\uff0c\u4f7f\u5f97\u6587\u4ef6\u5904\u7406\u66f4\u52a0\u9ad8\u6548\u548c\u7b80\u6d01\u3002<\/p>\n<\/p>\n

\u5728\u6570\u636e\u79d1\u5b66\u548c\u673a\u5668\u5b66\u4e60<\/a>\u9886\u57df\uff0c\u8fed\u4ee3\u5668\u88ab\u5e7f\u6cdb\u5e94\u7528\u4e8e\u6570\u636e\u9884\u5904\u7406\u548c\u6279\u91cf\u5904\u7406\u3002\u5e93\u5982Pandas\u548cTensorFlow\u90fd\u4f7f\u7528\u8fed\u4ee3\u5668\u4f5c\u4e3a\u5904\u7406\u5927\u91cf\u6570\u636e\u7684\u57fa\u7840\u8bbe\u65bd\u3002\u8fd9\u4e0d\u4ec5\u4f7f\u5f97\u6570\u636e\u5904\u7406\u6d41\u7a0b\u66f4\u52a0\u9ad8\u6548\uff0c\u4e5f\u8ba9\u4ee3\u7801\u66f4\u6e05\u6670\u3001\u6613\u4e8e\u7406\u89e3\u548c\u7ef4\u62a4\u3002<\/p>\n<\/p>\n

\u7efc\u4e0a\u6240\u8ff0\uff0c\u901a\u8fc7\u5b9e\u73b0__iter__<\/code>\u65b9\u6cd5\uff0cPython\u4e2d\u7684\u5bf9\u8c61\u53ef\u4ee5\u66f4\u597d\u5730\u878d\u5165\u8bed\u8a00\u7684\u8fed\u4ee3\u73af\u5883\uff0c\u5b9e\u73b0\u5176\u80fd\u591f\u5728\u5404\u79cd\u573a\u666f\u4e0b\u66f4\u52a0\u901a\u7528\u3001\u9ad8\u6548\u5730\u5904\u7406\u6570\u636e\u3002\u8fed\u4ee3\u5668\u6a21\u5f0f\u7684\u8fd9\u4e9b\u4f18\u70b9\u8bf4\u660e\u4e86\u4e3a\u4ec0\u4e48\u5b83\u5728Python\u7f16\u7a0b\u4e2d\u626e\u6f14\u7740\u4e0d\u53ef\u6216\u7f3a\u7684\u89d2\u8272\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

\u4e3a\u4ec0\u4e48\u8fed\u4ee3\u5668\u5728Python\u4e2d\u9700\u8981\u5b9e\u73b0__iter__\u65b9\u6cd5\uff1f<\/strong><\/p>\n

    \n
  • \u8fed\u4ee3\u5668\u662f\u4e00\u79cd\u63d0\u4f9b\u4e86\u904d\u5386\u6570\u636e\u96c6\u5408\u7684\u65b9\u5f0f\u7684\u7279\u6b8a\u5bf9\u8c61\u3002\u5b83\u901a\u8fc7__iter__<\/code>\u65b9\u6cd5\u8fd4\u56de\u81ea\u8eab\uff0c\u5e76\u4e14\u5b9e\u73b0\u4e86__next__<\/code>\u65b9\u6cd5\u6765\u83b7\u53d6\u4e0b\u4e00\u4e2a\u5143\u7d20\u3002<\/li>\n
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