{"id":303124,"date":"2024-05-20T18:52:09","date_gmt":"2024-05-20T10:52:09","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/303124.html"},"modified":"2024-05-20T18:52:33","modified_gmt":"2024-05-20T10:52:33","slug":"%e5%a6%82%e4%bd%95%e6%9c%80%e7%ae%80%e5%8d%95%e3%80%81%e9%80%9a%e4%bf%97%e5%9c%b0%e7%90%86%e8%a7%a3python%e7%9a%84%e8%bf%ad%e4%bb%a3%e5%99%a8-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/303124.html","title":{"rendered":"\u5982\u4f55\u6700\u7b80\u5355\u3001\u901a\u4fd7\u5730\u7406\u89e3Python\u7684\u8fed\u4ee3\u5668"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26215347\/297babc6-3c3d-4957-b233-577d48a2a161.webp\" alt=\"\u5982\u4f55\u6700\u7b80\u5355\u3001\u901a\u4fd7\u5730\u7406\u89e3Python\u7684\u8fed\u4ee3\u5668\" \/><\/p>\n<p><p>\u8fed\u4ee3\u5668\u662fPython\u4e2d\u4e00\u4e2a\u8ba9\u6211\u4eec\u53ef\u4ee5\u904d\u5386\u6216\u201c\u8fed\u4ee3\u201d\u5bb9\u5668\uff08\u6bd4\u5982\u5217\u8868\u3001\u5143\u7ec4\u7b49\uff09\u4e2d\u5143\u7d20\u7684\u5de5\u5177\u3002<strong>\u4f7f\u7528\u8fed\u4ee3\u5668\uff0c\u6211\u4eec\u53ef\u4ee5\u9010\u4e00\u8bbf\u95ee\u5bb9\u5668\u5185\u7684\u5143\u7d20\uff0c\u800c\u4e0d\u9700\u8981\u5bf9\u5143\u7d20\u7684\u7d22\u5f15\u4f4d\u7f6e\u6709\u6240\u4e86\u89e3<\/strong>\u3002\u7b80\u5355\u6765\u8bf4\uff0c\u8fed\u4ee3\u5668\u5c31\u50cf\u662f\u4e00\u79cd\u865a\u62df\u7684&quot;\u6e38\u6807&quot;\u6216&quot;\u6307\u9488&quot;\uff0c\u5b83\u4ece\u5bb9\u5668\u7684\u7b2c\u4e00\u4e2a\u5143\u7d20\u5f00\u59cb\uff0c\u9010\u4e2a\u79fb\u52a8\u81f3\u4e0b\u4e00\u4e2a\u5143\u7d20\uff0c\u76f4\u5230\u5bb9\u5668\u7684\u672b\u5c3e\u3002<\/p>\n<\/p>\n<p><p>\u4ee5\u4e00\u672c\u4e66\u4e3a\u4f8b\uff0c\u5982\u679c\u628a\u6bcf\u4e00\u9875\u5f53\u505a\u5bb9\u5668\u4e2d\u7684\u4e00\u4e2a\u5143\u7d20\uff0c\u8fed\u4ee3\u5668\u5c31\u50cf\u662f\u7ffb\u9605\u8fd9\u672c\u4e66\u7684\u624b\u6307\u3002\u6211\u4eec\u53ef\u4ee5\u4e00\u6b21\u53ea\u5173\u6ce8\u4e00\u9875\u9762\u7684\u5185\u5bb9\uff0c\u800c\u4e0d\u9700\u8981\u77e5\u9053\u5f53\u524d\u662f\u7b2c\u51e0\u9875\uff0c\u4e5f\u4e0d\u7528\u5173\u5fc3\u6574\u672c\u4e66\u6709\u591a\u5c11\u9875\u3002<strong>\u5bf9\u4e8e\u4e66\u672c\u7684\u4e0d\u540c\u7ae0\u8282\uff0c\u53ea\u8981\u624b\u6307\u7ffb\u9605\uff0c\u5c31\u53ef\u4ee5\u8f7b\u677e\u8bbf\u95ee<\/strong>\u3002\u8fd9\u79cd\u65b9\u5f0f\u8ba9\u6211\u4eec\u53ef\u4ee5\u975e\u5e38\u76f4\u89c2\u4e14\u81ea\u7136\u5730\u4eab\u53d7\u9605\u8bfb\u7684\u8fc7\u7a0b\uff0c\u540c\u65f6\u5c4f\u853d\u4e86\u9875\u7801\u8fd9\u6837\u7684\u7ec6\u8282\u4fe1\u606f\u3002<\/p>\n<\/p>\n<p><h3><strong>\u4e00\u3001\u8fed\u4ee3\u5668\u7684\u57fa\u672c\u6982\u5ff5<\/strong><\/h3>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u8fed\u4ee3\u5668\u7684\u5b9e\u73b0\u57fa\u4e8e\u4e24\u4e2a\u6838\u5fc3\u65b9\u6cd5\u3002\u9996\u5148\u662f<code>__iter__()<\/code>\u65b9\u6cd5\uff0c\u5b83\u8fd4\u56de\u8fed\u4ee3\u5668\u5bf9\u8c61\u81ea\u5df1\uff0c\u8fd9\u5b9e\u9645\u4e0a\u6807\u5fd7\u7740\u53ef\u8fed\u4ee3\u7684\u5bf9\u8c61\u3002\u63a5\u4e0b\u6765\u662f<code>__next__()<\/code>\u65b9\u6cd5\uff0c\u5f53\u8c03\u7528\u8fd9\u4e2a\u65b9\u6cd5\u65f6\uff0c\u8fed\u4ee3\u5668\u8fd4\u56de\u5bb9\u5668\u7684\u4e0b\u4e00\u4e2a\u5143\u7d20\u3002\u5f53\u5bb9\u5668\u4e2d\u6ca1\u6709\u66f4\u591a\u7684\u5143\u7d20\u65f6\uff0c<code>__next__()<\/code>\u65b9\u6cd5\u4f1a\u629b\u51fa\u4e00\u4e2a<code>StopIteration<\/code>\u7684\u5f02\u5e38\uff0c\u544a\u8bc9\u6211\u4eec\u8fed\u4ee3\u7ed3\u675f\u4e86\u3002<\/p>\n<\/p>\n<p><p><strong>\u8fed\u4ee3\u5668\u7684\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u4e00\u79cd\u6807\u51c6\u7684\u8fed\u4ee3\u5bb9\u5668\u5143\u7d20\u7684\u65b9\u5f0f<\/strong>\u3002\u8fd9\u79cd\u6a21\u5f0f\u6781\u5927\u5730\u7b80\u5316\u4e86Python\u7f16\u7a0b\uff0c\u4f7f\u5f97\u6211\u4eec\u5728\u5904\u7406\u5e8f\u5217\u6570\u636e\u65f6\uff0c\u53ef\u4ee5\u7528\u7edf\u4e00\u7684\u65b9\u6cd5\u6765\u904d\u5386\u5404\u79cd\u6570\u636e\u7c7b\u578b\u3002<\/p>\n<\/p>\n<p><h3><strong>\u4e8c\u3001\u521b\u5efa\u8fed\u4ee3\u5668\u7684\u65b9\u6cd5<\/strong><\/h3>\n<\/p>\n<p><p>\u8fed\u4ee3\u5668\u5728Python\u4e2d\u7684\u521b\u5efa\u53ef\u4ee5\u975e\u5e38\u7b80\u5355\u3002\u5927\u591a\u6570\u5185\u5efa\u7684\u5bb9\u5668\u5bf9\u8c61\uff08\u5982\u5217\u8868\u3001\u5143\u7ec4\u3001\u5b57\u5178\u7b49\uff09\u90fd\u81ea\u5e26\u4e86\u521b\u5efa\u8fed\u4ee3\u5668\u7684\u65b9\u6cd5\u3002\u6211\u4eec\u53ea\u9700\u8981\u8c03\u7528\u5185\u7f6e\u7684<code>iter()<\/code>\u51fd\u6570\u5e76\u5c06\u5bb9\u5668\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012\uff0c\u5c31\u53ef\u4ee5\u83b7\u53d6\u5230\u5bf9\u5e94\u5bb9\u5668\u7684\u8fed\u4ee3\u5668\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u662f\uff0c\u5047\u8bbe\u6211\u4eec\u6709\u4e00\u4e2a\u5217\u8868list1\u3002\u901a\u8fc7\u8c03\u7528<code>iter(list1)<\/code>\uff0c\u6211\u4eec\u5c31\u5f97\u5230\u4e86\u8fd9\u4e2a\u5217\u8868\u7684\u8fed\u4ee3\u5668\u3002\u63a5\u7740\uff0c\u6211\u4eec\u53ef\u4ee5\u7528<code>next()<\/code>\u51fd\u6570\u6765\u9010\u4e00\u83b7\u53d6\u8fed\u4ee3\u5668\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n<p><p><strong>\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u6211\u4eec\u4e0d\u9700\u8981\u7f16\u5199\u4efb\u4f55\u5faa\u73af\u8bed\u53e5\u6216\u8005\u663e\u5f0f\u5730\u7ba1\u7406\u5143\u7d20\u7d22\u5f15\uff0c\u4fbf\u53ef\u4ee5\u904d\u5386\u6574\u4e2a\u5217\u8868<\/strong>\u3002<\/p>\n<\/p>\n<p><h3><strong>\u4e09\u3001\u8fed\u4ee3\u5668\u7684\u4f7f\u7528\u573a\u666f<\/strong><\/h3>\n<\/p>\n<p><p>\u8fed\u4ee3\u5668\u5e7f\u6cdb\u5e94\u7528\u4e8ePython\u4e2d\u3002\u4e0d\u4ec5\u662f\u56e0\u4e3a\u7b80\u5355\u6613\u7528\uff0c\u5b83\u8fd8\u80fd\u5e2e\u52a9\u6211\u4eec\u4f18\u96c5\u5730\u5904\u7406\u5927\u91cf\u6570\u636e\u3002\u4f8b\u5982\uff0c\u5728\u6570\u636e\u5206\u6790\u548c\u6570\u636e\u5904\u7406\u9886\u57df\uff0c\u6211\u4eec\u7ecf\u5e38\u8981\u5904\u7406\u6bd4\u5185\u5b58\u5927\u5f97\u591a\u7684\u6570\u636e\u96c6\u3002\u5982\u679c\u4f7f\u7528\u666e\u901a\u7684\u5217\u8868\u6765\u52a0\u8f7d\u5168\u90e8\u6570\u636e\uff0c\u53ef\u80fd\u4f1a\u5bfc\u81f4\u5185\u5b58\u4e0d\u8db3\u3002\u8fed\u4ee3\u5668\u5c31\u6d3e\u4e0a\u7528\u573a\u4e86\u3002<\/p>\n<\/p>\n<p><p><strong>\u501f\u52a9\u8fed\u4ee3\u5668\uff0c\u6211\u4eec\u53ef\u4ee5\u4e00\u6b21\u52a0\u8f7d\u4e00\u4e2a\u5143\u7d20\uff0c\u5904\u7406\u5b8c\u540e\u518d\u52a0\u8f7d\u4e0b\u4e00\u4e2a<\/strong>\u3002\u8fd9\u610f\u5473\u7740\u65e0\u8bba\u6570\u636e\u96c6\u6709\u591a\u5927\uff0c\u6211\u4eec\u90fd\u53ef\u4ee5\u7528\u540c\u6837\u7684\u5185\u5b58\u6765\u5904\u7406\u5b83\u3002\u56e0\u6b64\uff0c\u8fed\u4ee3\u5668\u5e38\u5e38\u7528\u4e8e\u5904\u7406\u5927\u578b\u6587\u4ef6\u3001\u6d41\u6570\u636e\u548c\u6570\u636e\u6d41\u6c34\u7ebf\u7b49\u573a\u666f\u3002<\/p>\n<\/p>\n<p><h3><strong>\u56db\u3001\u8fed\u4ee3\u5668\u4e0e\u751f\u6210\u5668\u7684\u533a\u522b<\/strong><\/h3>\n<\/p>\n<p><p>\u867d\u7136\u8fed\u4ee3\u5668\u975e\u5e38\u5f3a\u5927\uff0c\u4f46\u662f\u6709\u65f6\u521b\u5efa\u4e00\u4e2a\u8fed\u4ee3\u5668\u53ef\u80fd\u4f1a\u6bd4\u8f83\u7e41\u7410\uff0c\u7279\u522b\u662f\u5f53\u9700\u8981\u5b9a\u4e49\u590d\u6742\u7684\u8fed\u4ee3\u903b\u8f91\u65f6\u3002\u8fd9\u65f6\u5019\uff0cPython\u7684\u751f\u6210\u5668\u5c31\u6d3e\u4e0a\u7528\u573a\u4e86\u3002<strong>\u751f\u6210\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u8fed\u4ee3\u5668<\/strong>\uff0c\u4f46\u5b83\u4e0d\u9700\u8981\u7f16\u5199<code>__iter__()<\/code>\u548c<code>__next__()<\/code>\u65b9\u6cd5\uff0c\u53ea\u9700\u8981\u5b9a\u4e49\u4e00\u4e2a\u6b63\u5e38\u7684\u51fd\u6570\u5e76\u4f7f\u7528<code>yield<\/code>\u8bed\u53e5\u8fd4\u56de\u6bcf\u6b21\u8fed\u4ee3\u7684\u503c\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<\/p>\n<p><p>\u751f\u6210\u5668\u7b80\u5316\u4e86\u8fed\u4ee3\u5668\u7684\u521b\u5efa\uff0c\u7279\u522b\u662f\u5728\u9700\u8981\u521b\u5efa\u590d\u6742\u903b\u8f91\u7684\u8fed\u4ee3\u5668\u65f6\u3002\u5b83\u4f7f\u5f97\u8fed\u4ee3\u5668\u7684\u7f16\u5199\u50cf\u662f\u5728\u5199\u666e\u901a\u7684\u51fd\u6570\u4e00\u6837\u81ea\u7136\u3001\u7b80\u5355\u3002<\/p>\n<\/p>\n<p><p><strong>\u751f\u6210\u5668\u7684\u5f3a\u5927\u4e4b\u5904\u5728\u4e8e\u5b83\u6bcf\u6b21\u53ea\u4ea7\u751f\u6240\u9700\u7684\u5143\u7d20\uff0c\u8fd9\u6837\u5c31\u907f\u514d\u4e86\u4e8b\u5148\u521b\u5efa\u548c\u5b58\u50a8\u6240\u6709\u5143\u7d20\u6240\u9700\u8981\u7684\u5185\u5b58\u6d88\u8017<\/strong>\u3002<\/p>\n<\/p>\n<p><h3><strong>\u4e94\u3001\u6df1\u5165\u7406\u89e3Python\u7684\u8fed\u4ee3\u534f\u8bae<\/strong><\/h3>\n<\/p>\n<p><p>\u8981\u6df1\u5165\u7406\u89e3\u8fed\u4ee3\u5668\uff0c\u6211\u4eec\u9700\u8981\u7406\u89e3Python\u91cc\u7684\u201c\u8fed\u4ee3\u534f\u8bae\u201d\u3002\u8fd9\u662fPython\u4e2d\u89c4\u5b9a\u7684\u4e00\u79cd\u7ea6\u5b9a\uff0c\u5b83\u8868\u660e\u4efb\u4f55\u6211\u4eec\u53ef\u4ee5\u904d\u5386\u7684\u5bf9\u8c61\u90fd\u9700\u8981\u5b9e\u73b0<code>__iter__()<\/code>\u65b9\u6cd5\u3002\u4e8b\u5b9e\u4e0a\uff0c\u4efb\u4f55\u5b9e\u73b0\u4e86<code>__iter__()<\/code>\u65b9\u6cd5\u7684\u5bf9\u8c61\u90fd\u88ab\u89c6\u4e3a\u53ef\u8fed\u4ee3\u7684\u3002\u800c\u5b9e\u73b0\u4e86<code>__next__()<\/code>\u65b9\u6cd5\u7684\u5bf9\u8c61\uff0c\u5219\u88ab\u89c6\u4e3a\u8fed\u4ee3\u5668\u3002<\/p>\n<\/p>\n<p><p><strong>\u5f53\u6211\u4eec\u4f7f\u7528for\u5faa\u73af\u6216\u8005\u5176\u4ed6\u8fed\u4ee3\u7ed3\u6784\u53bb\u904d\u5386\u4e00\u4e2a\u5bf9\u8c61\u65f6\uff0cPython\u7684\u89e3\u91ca\u5668\u4f1a\u81ea\u52a8\u5730\u53bb\u8c03\u7528\u5bf9\u8c61\u7684<code>__iter__()<\/code>\u548c<code>__next__()<\/code>\u65b9\u6cd5\u6765\u5b9e\u73b0\u8fed\u4ee3\u8fc7\u7a0b<\/strong>\u3002<\/p>\n<\/p>\n<p><h3><strong>\u516d\u3001\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u8fed\u4ee3\u5668<\/strong><\/h3>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6211\u4eec\u4f1a\u770b\u5230\u8fed\u4ee3\u5668\u6709\u591a\u4e48\u91cd\u8981\u3002\u4f8b\u5982\uff0c\u5728\u5904\u7406\u6587\u4ef6\u65f6\uff0c\u6211\u4eec\u5e38\u5e38\u4f1a\u4e00\u884c\u4e00\u884c\u5730\u8bfb\u53d6\u5185\u5bb9\u3002\u6587\u4ef6\u5bf9\u8c61\u5728Python\u4e2d\u5c31\u662f\u4e00\u4e2a\u8fed\u4ee3\u5668\u3002\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528\u8fed\u4ee3\u5668\u7684\u65b9\u6cd5\u6765\u9010\u884c\u8bfb\u53d6\u6587\u4ef6\uff0c\u76f4\u5230\u6587\u4ef6\u7ed3\u675f\u3002<\/p>\n<\/p>\n<p><p>\u6570\u636e\u5e93\u7684\u67e5\u8be2\u7ed3\u679c\u4e5f\u5e38\u5e38\u4ee5\u8fed\u4ee3\u5668\u5f62\u5f0f\u63d0\u4f9b\u3002\u6211\u4eec\u53ef\u4ee5\u8fed\u4ee3\u67e5\u8be2\u7ed3\u679c\u96c6\uff0c\u4e00\u6b21\u5904\u7406\u4e00\u6761\u8bb0\u5f55\uff0c\u8fd9\u65e0\u7591\u5bf9\u4e8e\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\u662f\u975e\u5e38\u6709\u6548\u548c\u8282\u7701\u8d44\u6e90\u7684\u3002<\/p>\n<\/p>\n<p><p><strong>\u5728\u73b0\u4ee3Python\u7f16\u7a0b\u4e2d\uff0c\u8fed\u4ee3\u5668\u662f\u4e00\u4e2a\u4e0d\u53ef\u6216\u7f3a\u7684\u5de5\u5177\uff0c\u5b83\u5728\u7b80\u5316\u4ee3\u7801\u3001\u63d0\u9ad8\u6548\u7387\u3001\u5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