{"id":204112,"date":"2025-05-29T14:21:11","date_gmt":"2025-05-29T06:21:11","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204112\/"},"modified":"2025-05-29T14:21:11","modified_gmt":"2025-05-29T06:21:11","slug":"%e4%ba%86%e8%a7%a3-python-%e5%87%bd%e6%95%b0%e7%9a%84%e6%97%b6%e9%97%b4%e5%a4%8d%e6%9d%82%e5%ba%a6","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204112\/","title":{"rendered":"\u4e86\u89e3 Python \u51fd\u6570\u7684\u65f6\u95f4\u590d\u6742\u5ea6"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>\u4e86\u89e3 Python \u51fd\u6570\u7684\u65f6\u95f4\u590d\u6742\u5ea6<\/h1>\n<p>\u4eb2\u7231\u7684\u7f16\u7a0b\u5b66\u4e60\u7231\u597d\u8005\uff0c\u5982\u679c\u4f60\u70b9\u5f00\u4e86\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u660e\u4f60\u5bf9\u300a\u4e86\u89e3 Python \u51fd\u6570\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u300b\u5f88\u611f\u5174\u8da3\u3002\u672c\u7bc7\u6587\u7ae0\u5c31\u6765\u7ed9\u5927\u5bb6\u8be6\u7ec6\u89e3\u6790\u4e00\u4e0b\uff0c\u4e3b\u8981\u4ecb\u7ecd\u4e00\u4e0b\uff0c\u5e0c\u671b\u6240\u6709\u8ba4\u771f\u8bfb\u5b8c\u7684\u7ae5\u978b\u4eec\uff0c\u90fd\u6709\u5b9e\u8d28\u6027\u7684\u63d0\u9ad8\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241028\/1730103893671f4a5566b87.jpg\" class=\"aligncenter\"><\/p>\n<p>\u7406\u89e3\u51fd\u6570\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u5bf9\u4e8e\u7f16\u5199\u9ad8\u6548\u7684\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002\u65f6\u95f4\u590d\u6742\u5ea6\u63d0\u4f9b\u4e86\u4e00\u79cd\u65b9\u6cd5\u6765\u5206\u6790\u7b97\u6cd5\u7684\u8fd0\u884c\u65f6\u95f4\u5982\u4f55\u968f\u7740\u8f93\u5165\u6570\u636e\u5927\u5c0f\u7684\u589e\u957f\u800c\u589e\u52a0\u3002\u5728\u672c\u6587\u4e2d\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8\u5404\u79cd\u5185\u7f6e Python \u51fd\u6570\u548c\u5e38\u89c1\u6570\u636e\u7ed3\u6784\u7684\u65f6\u95f4\u590d\u6742\u5ea6\uff0c\u5e2e\u52a9\u5f00\u53d1\u4eba\u5458\u5728\u7f16\u5199\u4ee3\u7801\u65f6\u505a\u51fa\u660e\u667a\u7684\u51b3\u7b56\u3002<\/p>\n<p>\u65f6\u95f4\u590d\u6742\u5ea6\u662f\u4e00\u4e2a\u8ba1\u7b97\u6982\u5ff5\uff0c\u63cf\u8ff0\u4e86\u7b97\u6cd5\u5b8c\u6210\u6240\u9700\u7684\u65f6\u95f4\u91cf\uff0c\u4f5c\u4e3a\u8f93\u5165\u957f\u5ea6\u7684\u51fd\u6570\u3002\u5b83\u901a\u5e38\u4f7f\u7528 Big O \u8868\u793a\u6cd5\u6765\u8868\u793a\uff0c\u8be5\u8868\u793a\u6cd5\u6839\u636e\u6700\u574f\u60c5\u51b5\u6216\u4e0a\u9650\u6027\u80fd\u5bf9\u7b97\u6cd5\u8fdb\u884c\u5206\u7c7b\u3002\u5e38\u89c1\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u5305\u62ec\uff1a<\/p>\n<ul>\n<li> <strong>O(1)<\/strong>\uff1a\u6052\u5b9a\u65f6\u95f4<\/li>\n<li> <strong>O(log n)<\/strong>\uff1a\u5bf9\u6570\u65f6\u95f4<\/li>\n<li> <strong>O(n)<\/strong>\uff1a\u7ebf\u6027\u65f6\u95f4<\/li>\n<li> <strong>O(n log n)<\/strong>\uff1a\u7ebf\u6027\u65f6\u95f4<\/li>\n<li> <strong>O(n\u00b2)<\/strong>\uff1a\u4e8c\u6b21\u65f6\u95f4<\/li>\n<li> <strong>O(2^n)<\/strong>\uff1a\u6307\u6570\u65f6\u95f4<\/li>\n<\/ul>\n<p>\u4e86\u89e3\u8fd9\u4e9b\u590d\u6742\u6027\u6709\u52a9\u4e8e\u5f00\u53d1\u4eba\u5458\u4e3a\u5176\u5e94\u7528\u7a0b\u5e8f\u9009\u62e9\u6b63\u786e\u7684\u7b97\u6cd5\u548c\u6570\u636e\u7ed3\u6784\u3002<\/p>\n<ul>\n<li>\n<p><strong>\u8bbf\u95ee\u5143\u7d20<\/strong>: list[index] \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u901a\u8fc7\u5217\u8868\u4e2d\u7684\u7d22\u5f15\u8bbf\u95ee\u5143\u7d20\u662f\u4e00\u4e2a\u6052\u5b9a\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u8ffd\u52a0\u5143\u7d20<\/strong>: list.append(value) \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u5217\u8868\u672b\u5c3e\u901a\u5e38\u662f\u4e00\u4e2a\u6052\u5b9a\u65f6\u95f4\u64cd\u4f5c\uff0c\u5c3d\u7ba1\u5f53\u9700\u8981\u8c03\u6574\u5217\u8868\u5927\u5c0f\u65f6\u6709\u65f6\u53ef\u80fd\u662f O(n)\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u63d2\u5165\u5143\u7d20<\/strong>: list.insert(index, value) \u2192 <strong>O(n)<\/strong><\/p>\n<ul>\n<li>\u5728\u7279\u5b9a\u7d22\u5f15\u5904\u63d2\u5165\u5143\u7d20\u9700\u8981\u79fb\u52a8\u5143\u7d20\uff0c\u4ece\u800c\u5bfc\u81f4\u7ebf\u6027\u65f6\u95f4\u590d\u6742\u5ea6\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u5220\u9664\u5143\u7d20<\/strong>\uff1alist.remove(value) \u2192 <strong>O(n)<\/strong><\/p>\n<ul>\n<li>\uff08\u6309\u503c\uff09\u5220\u9664\u5143\u7d20\u9700\u8981\u5148\u641c\u7d22\u8be5\u5143\u7d20\uff0c\u8fd9\u9700\u8981\u7ebf\u6027\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u5bf9\u5217\u8868\u8fdb\u884c\u6392\u5e8f<\/strong>\uff1alist.sort() \u2192 <strong>O(n log n)<\/strong><\/p>\n<ul>\n<li>Python \u5185\u7f6e\u7684\u6392\u5e8f\u7b97\u6cd5\uff08Timsort\uff09\u5728\u5e73\u5747\u60c5\u51b5\u548c\u6700\u574f\u60c5\u51b5\u4e0b\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(n log n)\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li>\n<p><strong>\u8bbf\u95ee\u503c<\/strong>\uff1adict[key] \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u7531\u4e8e\u5e95\u5c42\u54c8\u5e0c\u8868\u7684\u5b9e\u73b0\uff0c\u901a\u8fc7\u5b57\u5178\u4e2d\u7684\u952e\u68c0\u7d22\u503c\u662f\u4e00\u4e2a\u5e38\u6570\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u63d2\u5165\u952e\u503c\u5bf9<\/strong>: dict[key] = value \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u6dfb\u52a0\u65b0\u7684\u952e\u503c\u5bf9\u4e5f\u662f\u4e00\u4e2a\u5e38\u6570\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u5220\u9664\u952e\u503c\u5bf9<\/strong>\uff1adel dict[key] \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u5220\u9664\u952e\u503c\u5bf9\u662f\u5728\u6052\u5b9a\u65f6\u95f4\u5185\u6267\u884c\u7684\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u68c0\u67e5\u4f1a\u5458\u8d44\u683c<\/strong>\uff1a\u8f93\u5165\u5b57\u5178 \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u68c0\u67e5\u5b57\u5178\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u4e2a\u952e\u662f\u4e00\u4e2a\u5e38\u6570\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li>\n<p><strong>\u6dfb\u52a0\u5143\u7d20<\/strong>\uff1aset.add(value) \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u5411\u96c6\u5408\u4e2d\u6dfb\u52a0\u5143\u7d20\u662f\u4e00\u4e2a\u6052\u5b9a\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u68c0\u67e5\u6210\u5458\u8d44\u683c<\/strong>\uff1a\u96c6\u5408\u4e2d\u7684\u503c \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u68c0\u67e5\u67d0\u4e2a\u5143\u7d20\u662f\u5426\u5728\u96c6\u5408\u4e2d\u4e5f\u662f\u4e00\u4e2a\u5e38\u6570\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u5220\u9664\u5143\u7d20<\/strong>\uff1aset.remove(value) \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u4ece\u96c6\u5408\u4e2d\u5220\u9664\u5143\u7d20\u662f\u5728\u6052\u5b9a\u65f6\u95f4\u5185\u6267\u884c\u7684\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li>\n<p><strong>\u8bbf\u95ee\u5b57\u7b26<\/strong>\uff1a\u5b57\u7b26\u4e32[\u7d22\u5f15] \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u901a\u8fc7\u7d22\u5f15\u8bbf\u95ee\u5b57\u7b26\u4e32\u4e2d\u7684\u5b57\u7b26\u662f\u4e00\u4e2a\u5e38\u6570\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u4e32\u8054<\/strong>\uff1a\u5b57\u7b26\u4e321 + \u5b57\u7b26\u4e322 \u2192 <strong>O(n)<\/strong><\/p>\n<ul>\n<li>\u8fde\u63a5\u4e24\u4e2a\u5b57\u7b26\u4e32\u9700\u8981\u7ebf\u6027\u65f6\u95f4\uff0c\u56e0\u4e3a\u5fc5\u987b\u521b\u5efa\u4e00\u4e2a\u65b0\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u641c\u7d22\u5b50\u5b57\u7b26\u4e32<\/strong>\uff1a string.find(substring) \u2192 <strong>O(n*m)<\/strong><\/p>\n<ul>\n<li>\u5728\u5b57\u7b26\u4e32\u4e2d\u641c\u7d22\u5b50\u5b57\u7b26\u4e32\u5728\u6700\u574f\u7684\u60c5\u51b5\u4e0b\u53ef\u80fd\u4f1a\u82b1\u8d39\u7ebf\u6027\u65f6\u95f4\uff0c\u5176\u4e2d n \u662f\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\uff0cm \u662f\u5b50\u5b57\u7b26\u4e32\u7684\u957f\u5ea6\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<ul>\n<li>\n<p><strong>\u6c42\u957f\u5ea6<\/strong>: len(object) \u2192 <strong>O(1)<\/strong><\/p>\n<ul>\n<li>\u67e5\u627e\u5217\u8868\u3001\u5b57\u5178\u6216\u96c6\u5408\u7684\u957f\u5ea6\u662f\u4e00\u4e2a\u5e38\u6570\u65f6\u95f4\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u5217\u8868\u63a8\u5bfc\u5f0f<\/strong>\uff1a[\u53ef\u8fed\u4ee3\u9879\u7684\u8868\u8fbe\u5f0f] \u2192 <strong>O(n)<\/strong><\/p>\n<ul>\n<li>\u5217\u8868\u63a8\u5bfc\u5f0f\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u662f\u7ebf\u6027\u7684\uff0c\u56e0\u4e3a\u5b83\u4eec\u8fed\u4ee3\u6574\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>\u901a\u8fc7\u5206\u6790\u5185\u7f6e\u51fd\u6570\u548c\u6570\u636e\u7ed3\u6784\u7684\u6027\u80fd\uff0c\u5f00\u53d1\u4eba\u5458\u53ef\u4ee5\u505a\u51fa\u660e\u667a\u7684\u51b3\u7b56\uff0c\u4ece\u800c\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u6027\u80fd\u3002\u9009\u62e9\u6b63\u786e\u7684\u6570\u636e\u7ed3\u6784\u65f6\uff0c\u8bf7\u59cb\u7ec8\u8003\u8651\u8f93\u5165\u6570\u636e\u7684\u5927\u5c0f\u4ee5\u53ca\u9700\u8981\u6267\u884c\u7684\u64cd\u4f5c<\/p>\n<p>\u672c\u7bc7\u5173\u4e8e\u300a\u4e86\u89e3 Python \u51fd\u6570\u7684\u65f6\u95f4\u590d\u6742\u5ea6\u300b\u7684\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\u5566\uff0c\u4f46\u662f\u5b66\u65e0\u6b62\u5883\uff0c\u60f3\u8981\u4e86\u89e3\u5b66\u4e60\u66f4\u591a\u5173\u4e8e\u6587\u7ae0\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u8bf7\u5173\u6ce8\u516c\u4f17\u53f7\uff01<\/p>\n<p>      \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3 Python \u51fd\u6570\u7684\u65f6\u95f4\u590d&#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-204112","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204112","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=204112"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204112\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}