{"id":205247,"date":"2025-05-29T15:58:30","date_gmt":"2025-05-29T07:58:30","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205247\/"},"modified":"2025-05-29T15:58:30","modified_gmt":"2025-05-29T07:58:30","slug":"python-%e4%b8%ad-lambda-%e8%a1%a8%e8%be%be%e5%bc%8f%e4%bd%9c%e7%94%a8%e5%9f%9f%e8%a7%a3%e6%9e%90%ef%bc%9a%e4%b8%ba%e4%bb%80%e4%b9%88%e7%9b%b8%e5%90%8c%e7%9a%84%e4%bb%a3%e7%a0%81%e4%bc%9a%e4%ba%a7","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205247\/","title":{"rendered":"Python \u4e2d lambda \u8868\u8fbe\u5f0f\u4f5c\u7528\u57df\u89e3\u6790\uff1a\u4e3a\u4ec0\u4e48\u76f8\u540c\u7684\u4ee3\u7801\u4f1a\u4ea7\u751f\u4e0d\u540c\u7684\u7ed3\u679c\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Python \u4e2d lambda \u8868\u8fbe\u5f0f\u4f5c\u7528\u57df\u89e3\u6790\uff1a\u4e3a\u4ec0\u4e48\u76f8\u540c\u7684\u4ee3\u7801\u4f1a\u4ea7\u751f\u4e0d\u540c\u7684\u7ed3\u679c\uff1f<\/h1>\n<p>\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6587\u7ae0\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300aPython \u4e2d lambda \u8868\u8fbe\u5f0f\u4f5c\u7528\u57df\u89e3\u6790\uff1a\u4e3a\u4ec0\u4e48\u76f8\u540c\u7684\u4ee3\u7801\u4f1a\u4ea7\u751f\u4e0d\u540c\u7684\u7ed3\u679c\uff1f\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241127\/173268056767469b775ce30.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>\u4ee3\u7801\u8f93\u51fa\u56f0\u60d1\uff1alambda\u8868\u8fbe\u5f0f\u4e2d\u7684\u4f5c\u7528\u57df\u89e3\u6790\u89c4\u5219<\/strong><\/p>\n<p>\u5728python\u4e2d\uff0clambda\u8868\u8fbe\u5f0f\u5e7f\u6cdb\u7528\u4e8e\u521b\u5efa\u533f\u540d\u51fd\u6570\uff0c\u5b83\u9075\u5faa\u7279\u5b9a\u7684\u4f5c\u7528\u57df\u89e3\u6790\u89c4\u5219\u3002\u7406\u89e3\u8fd9\u4e9b\u89c4\u5219\u5bf9\u4e8e\u89e3\u91ca\u4e0d\u540c\u4ee3\u7801\u8f93\u51fa\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p><strong>\u7b2c\u4e00\u4e2a\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>def foo():\n    return [lambda x: x + i for i in range(4)]\n\nprint([x(3) for x in foo()])<\/pre>\n<p><strong>\u8f93\u51fa\uff1a<\/strong><\/p>\n<pre>[6, 6, 6, 6]<\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0cfoo() \u8fd4\u56de\u4e00\u4e2a\u5217\u8868\uff0c\u5176\u4e2d\u5143\u7d20\u662f\u533f\u540d\u51fd\u6570 lambda x: x + i\u3002\u7531\u4e8e i \u5728\u5faa\u73af\u4e2d\u88ab\u8d4b\u503c\uff0c\u5faa\u73af\u6267\u884c\u5b8c\u540e i \u7684\u503c\u4e3a 3\u3002\u56e0\u6b64\uff0c\u8fd9\u4e9b\u533f\u540d\u51fd\u6570\u90fd\u643a\u5e26\u4e86\u76f8\u540c\u7684 i \u503c\uff0c\u5bfc\u81f4\u6240\u6709\u51fd\u6570\u8c03\u7528\u90fd\u8fd4\u56de\u76f8\u540c\u7684\u8f93\u51fa\u3002<\/p>\n<p><strong>\u7b2c\u4e8c\u4e2a\u4ee3\u7801\u793a\u4f8b\uff1a<\/strong><\/p>\n<pre>def foo():\n    return (lambda x: x + i for i in range(4))\n\nprint([x(3) for x in foo()])<\/pre>\n<p><strong>\u8f93\u51fa\uff1a<\/strong><\/p>\n<pre>[3, 4, 5, 6]<\/pre>\n<p>\u4e0e\u7b2c\u4e00\u4e2a\u793a\u4f8b\u4e0d\u540c\uff0cfoo() \u8fd4\u56de\u4e00\u4e2a\u751f\u6210\u5668\uff0c\u800c\u4e0d\u662f\u5217\u8868\u3002\u751f\u6210\u5668\u662f\u4e00\u79cd\u7279\u6b8a\u7c7b\u578b\u7684\u8fed\u4ee3\u5668\uff0c\u5b83\u4f1a\u5728\u9700\u8981\u65f6\u624d\u4f9d\u6b21\u751f\u6210\u5143\u7d20\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u751f\u6210\u5668\u4f1a\u5728\u6bcf\u6b21\u8c03\u7528 x(3) \u65f6\u52a8\u6001\u5730\u91cd\u65b0\u6267\u884c\u5faa\u73af\uff0c\u5c06 i \u4f9d\u6b21\u8d4b\u503c\u4e3a 0\u30011\u30012 \u548c 3\uff0c\u4ece\u800c\u5f97\u5230\u4e0d\u540c\u7684\u8f93\u51fa\u7ed3\u679c\u3002<\/p>\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0c\u5728\u7b2c\u4e00\u4e2a\u793a\u4f8b\u4e2d\uff0c\u7531\u4e8elambda\u8868\u8fbe\u5f0f\u5728\u5faa\u73af\u5916\u5b9a\u4e49\uff0ci \u7684\u503c\u5728\u5faa\u73af\u6267\u884c\u524d\u5c31\u5df2\u7ecf\u56fa\u5b9a\u3002\u800c\u5728\u7b2c\u4e8c\u4e2a\u793a\u4f8b\u4e2d\uff0clambda\u8868\u8fbe\u5f0f\u5728\u751f\u6210\u5668\u5185\u60f0\u6027\u6c42\u503c\uff0c\u6839\u636e\u9700\u8981\u751f\u6210\u6bcf\u4e2a\u5143\u7d20\uff0c\u786e\u4fdd\u6bcf\u6b21\u8c03\u7528\u65f6\u7684 i \u503c\u90fd\u4e0d\u540c\u3002<\/p>\n<p>\u7ec8\u4e8e\u4ecb\u7ecd\u5b8c\u5566\uff01\u5c0f\u4f19\u4f34\u4eec\uff0c\u8fd9\u7bc7\u5173\u4e8e\u300aPython \u4e2d lambda \u8868\u8fbe\u5f0f\u4f5c\u7528\u57df\u89e3\u6790\uff1a\u4e3a\u4ec0\u4e48\u76f8\u540c\u7684\u4ee3\u7801\u4f1a\u4ea7\u751f\u4e0d\u540c\u7684\u7ed3\u679c\uff1f\u300b\u7684\u4ecb\u7ecd\u5e94\u8be5\u8ba9\u4f60\u6536\u83b7\u591a\u591a\u4e86\u5427\uff01\u6b22\u8fce\u5927\u5bb6\u6536\u85cf\u6216\u5206\u4eab\u7ed9\u66f4\u591a\u9700\u8981\u5b66\u4e60\u7684\u670b\u53cb\u5427~\u516c\u4f17\u53f7\u4e5f\u4f1a\u53d1\u5e03\u6587\u7ae0\u76f8\u5173\u77e5\u8bc6\uff0c\u5feb\u6765\u5173\u6ce8\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python \u4e2d lambda &#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-205247","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=205247"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205247\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}