{"id":78515,"date":"2026-02-27T20:04:55","date_gmt":"2026-02-27T12:04:55","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/78515.html"},"modified":"2026-02-27T20:04:55","modified_gmt":"2026-02-27T12:04:55","slug":"%e7%ac%ac%e4%ba%94%e7%ab%a0%ef%bd%9c%e5%87%bd%e6%95%b0%ef%bc%88%e5%9f%ba%e7%a1%80%e7%af%87%ef%bc%89%ef%bc%9a%e5%86%99%e4%b8%80%e6%ac%a1%ef%bc%8c%e7%94%a8%e4%b8%80%e8%be%88%e5%ad%90","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/78515.html","title":{"rendered":"\u7b2c\u4e94\u7ae0\uff5c\u51fd\u6570\uff08\u57fa\u7840\u7bc7\uff09\uff1a\u5199\u4e00\u6b21\uff0c\u7528\u4e00\u8f88\u5b50"},"content":{"rendered":"<hr \/>\n<h3>&#x1f4cc; \u5f15\u8a00&#xff1a;\u4e0d\u8981\u91cd\u590d\u53d1\u660e\u8f6e\u5b50<\/h3>\n<p>\u8fd8\u8bb0\u5f97\u5199\u4e5d\u4e5d\u4e58\u6cd5\u8868\u7684\u65f6\u5019\u5417&#xff1f;\u4f60\u5f97\u628a\u5faa\u73af\u5d4c\u5957\u5199\u4e00\u904d\u3002\u8981\u662f\u54ea\u5929\u60f3\u6539\u4e2a\u683c\u5f0f&#xff0c;\u5f97\u628a\u6240\u6709\u4ee3\u7801\u7ffb\u51fa\u6765\u6539\u3002\u8fd9\u5c31\u50cf\u6bcf\u5929\u505a\u540c\u6837\u7684\u996d&#xff0c;\u6bcf\u6b21\u90fd\u8981\u4ece\u5934\u5207\u83dc\u2014\u2014\u592a\u7d2f\u4e86&#xff01;<\/p>\n<p>\u51fd\u6570\u5c31\u662f\u7f16\u7a0b\u754c\u7684\u201c\u9884\u5236\u83dc\u201d\u3002\u4f60\u628a\u4e00\u6bb5\u4ee3\u7801\u6253\u5305\u8d77\u6765&#xff0c;\u8d77\u4e2a\u540d\u5b57&#xff0c;\u4ee5\u540e\u60f3\u7528\u5c31\u201c\u8c03\u7528\u201d\u4e00\u4e0b\u3002\u6539\u4e86\u51fd\u6570\u4f53&#xff0c;\u6240\u6709\u7528\u5230\u7684\u5730\u65b9\u90fd\u81ea\u52a8\u66f4\u65b0\u3002\u8fd9\u5c31\u662f\u4f20\u8bf4\u4e2d\u7684 DRY \u539f\u5219&#xff08;Don\u2018t Repeat Yourself&#xff09;\u3002<\/p>\n<p>\u672c\u7ae0\u6211\u4eec\u5b66\u4e60\u51fd\u6570\u7684\u65b9\u65b9\u9762\u9762&#xff0c;\u4ece\u5b9a\u4e49\u5230\u8c03\u7528&#xff0c;\u4ece\u53c2\u6570\u5230\u4f5c\u7528\u57df&#xff0c;\u4ece\u9012\u5f52\u5230 lambda\u3002\u638c\u63e1\u51fd\u6570&#xff0c;\u4f60\u7684\u4ee3\u7801\u5c06\u8131\u80ce\u6362\u9aa8\u3002<\/p>\n<hr \/>\n<h2>\u4e00\u3001\u5b9a\u4e49\u4e0e\u8c03\u7528&#xff1a;Hello Function&#xff01;<\/h2>\n<h3>1\ufe0f\u20e3 \u6700\u7b80\u5355\u7684\u51fd\u6570<\/h3>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">greet<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u4f60\u597d&#xff0c;\u4e16\u754c&#xff01;&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>greet<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u8c03\u7528\u51fd\u6570<\/span><\/p>\n<ul>\n<li>def \u5173\u952e\u5b57\u58f0\u660e\u51fd\u6570<\/li>\n<li>\u51fd\u6570\u540d\u540e\u8ddf\u5706\u62ec\u53f7\u548c\u5192\u53f7<\/li>\n<li>\u51fd\u6570\u4f53\u7f29\u8fdb<\/li>\n<li>\u8c03\u7528\u65f6\u5199\u51fd\u6570\u540d\u52a0\u62ec\u53f7<\/li>\n<\/ul>\n<hr \/>\n<h3>2\ufe0f\u20e3 \u5e26\u53c2\u6570\u548c\u8fd4\u56de\u503c<\/h3>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    result <span class=\"token operator\">&#061;<\/span> a <span class=\"token operator\">&#043;<\/span> b<br \/>\n    <span class=\"token keyword\">return<\/span> result<\/p>\n<p><span class=\"token builtin\">sum<\/span> <span class=\"token operator\">&#061;<\/span> add<span class=\"token punctuation\">(<\/span><span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token builtin\">sum<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 8<\/span><\/p>\n<ul>\n<li>\u53c2\u6570\u653e\u5728\u62ec\u53f7\u91cc&#xff0c;\u591a\u4e2a\u53c2\u6570\u7528\u9017\u53f7\u5206\u9694<\/li>\n<li>return \u8fd4\u56de\u7ed3\u679c&#xff0c;\u51fd\u6570\u6267\u884c\u7ed3\u675f<\/li>\n<li>\u5982\u679c\u6ca1\u6709 return&#xff0c;\u51fd\u6570\u9ed8\u8ba4\u8fd4\u56de None<\/li>\n<\/ul>\n<hr \/>\n<h3>3\ufe0f\u20e3 \u591a\u4e2a\u8fd4\u56de\u503c&#xff08;\u5176\u5b9e\u662f\u5143\u7ec4&#xff09;<\/h3>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">get_min_max<\/span><span class=\"token punctuation\">(<\/span>numbers<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token builtin\">min<\/span><span class=\"token punctuation\">(<\/span>numbers<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token builtin\">max<\/span><span class=\"token punctuation\">(<\/span>numbers<span class=\"token punctuation\">)<\/span><\/p>\n<p>result <span class=\"token operator\">&#061;<\/span> get_min_max<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">9<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>result<span class=\"token punctuation\">)<\/span>       <span class=\"token comment\"># (1, 9)<\/span><br \/>\nmin_val<span class=\"token punctuation\">,<\/span> max_val <span class=\"token operator\">&#061;<\/span> get_min_max<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">9<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u89e3\u5305<\/span><\/p>\n<hr \/>\n<h3>&#x1f9e0; \u51b7\u77e5\u8bc6&#xff1a;\u51fd\u6570\u662f\u4e00\u7b49\u516c\u6c11<\/h3>\n<p>\u5728 Python \u91cc&#xff0c;\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61&#xff0c;\u53ef\u4ee5\u8d4b\u503c\u7ed9\u53d8\u91cf\u3001\u5b58\u5728\u5217\u8868\u91cc\u3001\u4f5c\u4e3a\u53c2\u6570\u4f20\u9012&#xff1a;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">say_hello<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Hello&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>func <span class=\"token operator\">&#061;<\/span> say_hello<br \/>\nfunc<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># Hello<\/span><\/p>\n<hr \/>\n<h2>\u4e8c\u3001\u53c2\u6570\u7c7b\u578b&#xff1a;Python \u7684\u82b1\u5f0f\u4f20\u53c2<\/h2>\n<p>Python \u7684\u53c2\u6570\u7cfb\u7edf\u975e\u5e38\u7075\u6d3b&#xff0c;\u652f\u6301\u591a\u79cd\u4f20\u9012\u65b9\u5f0f\u3002<\/p>\n<hr \/>\n<h3>1\ufe0f\u20e3 \u4f4d\u7f6e\u53c2\u6570&#xff08;Positional Arguments&#xff09;<\/h3>\n<p>\u6700\u7b80\u5355\u7684\u5f62\u5f0f&#xff0c;\u8c03\u7528\u65f6\u6309\u987a\u5e8f\u8d4b\u503c&#xff1a;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">describe_pet<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> species<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>name<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\"> \u662f\u4e00\u53ea <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>species<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>describe_pet<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u65fa\u8d22&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u72d7&#034;<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<hr \/>\n<h3>2\ufe0f\u20e3 \u9ed8\u8ba4\u53c2\u6570&#xff08;Default Arguments&#xff09;<\/h3>\n<p>\u7ed9\u53c2\u6570\u6307\u5b9a\u9ed8\u8ba4\u503c&#xff0c;\u8c03\u7528\u65f6\u53ef\u4ee5\u7701\u7565&#xff1a;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">describe_pet<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> species<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u72d7&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>name<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\"> \u662f\u4e00\u53ea <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>species<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>describe_pet<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u65fa\u8d22&#034;<\/span><span class=\"token punctuation\">)<\/span>        <span class=\"token comment\"># \u65fa\u8d22 \u662f\u4e00\u53ea \u72d7<\/span><br \/>\ndescribe_pet<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u54aa\u54aa&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;\u732b&#034;<\/span><span class=\"token punctuation\">)<\/span>   <span class=\"token comment\"># \u54aa\u54aa \u662f\u4e00\u53ea \u732b<\/span><\/p>\n<p>\u26a0\ufe0f \u91cd\u8981\u9677\u9631&#xff1a;\u9ed8\u8ba4\u53c2\u6570\u5728\u51fd\u6570\u5b9a\u4e49\u65f6\u8ba1\u7b97\u4e00\u6b21&#xff0c;\u5982\u679c\u9ed8\u8ba4\u503c\u662f\u53ef\u53d8\u5bf9\u8c61&#xff08;\u5982\u5217\u8868\u3001\u5b57\u5178&#xff09;&#xff0c;\u591a\u6b21\u8c03\u7528\u4f1a\u5171\u4eab\u540c\u4e00\u4e2a\u5bf9\u8c61&#xff01;<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">add_item<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">,<\/span> lst<span class=\"token operator\">&#061;<\/span><span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span>   <span class=\"token comment\"># \u4e0d\u8981\u8fd9\u6837\u5199&#xff01;<\/span><br \/>\n    lst<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> lst<\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>add_item<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># [1]<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>add_item<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># [1, 2]  \u2192 \u54a6&#xff1f;\u4e0d\u662f\u5e94\u8be5 [2] \u5417&#xff1f;<\/span><\/p>\n<p>\u6b63\u786e\u505a\u6cd5&#xff1a;\u9ed8\u8ba4\u53c2\u6570\u8bbe\u4e3a None&#xff0c;\u5185\u90e8\u518d\u521b\u5efa\u65b0\u5bf9\u8c61\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">add_item<\/span><span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">,<\/span> lst<span class=\"token operator\">&#061;<\/span><span class=\"token boolean\">None<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> lst <span class=\"token keyword\">is<\/span> <span class=\"token boolean\">None<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        lst <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token punctuation\">]<\/span><br \/>\n    lst<span class=\"token punctuation\">.<\/span>append<span class=\"token punctuation\">(<\/span>item<span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> lst<\/p>\n<hr \/>\n<h3>3\ufe0f\u20e3 \u53ef\u53d8\u4f4d\u7f6e\u53c2\u6570&#xff08;*args&#xff09;<\/h3>\n<p>\u5f53\u4f60\u4e0d\u77e5\u9053\u8c03\u7528\u65f6\u4f1a\u4f20\u5165\u591a\u5c11\u4e2a\u4f4d\u7f6e\u53c2\u6570\u65f6&#xff0c;\u7528 *args\u3002\u5b83\u4f1a\u5c06\u591a\u4f59\u7684\u4f4d\u7f6e\u53c2\u6570\u6253\u5305\u6210\u5143\u7ec4\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">sum_all<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>numbers<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    total <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> n <span class=\"token keyword\">in<\/span> numbers<span class=\"token punctuation\">:<\/span><br \/>\n        total <span class=\"token operator\">&#043;&#061;<\/span> n<br \/>\n    <span class=\"token keyword\">return<\/span> total<\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>sum_all<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>      <span class=\"token comment\"># 6<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>sum_all<span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>       <span class=\"token comment\"># 30<\/span><\/p>\n<p>\u540d\u5b57\u4e0d\u4e00\u5b9a\u8981\u53eb args&#xff0c;\u4f46\u661f\u53f7 * \u662f\u5fc5\u987b\u7684&#xff0c;\u60ef\u4f8b\u7528 *args\u3002<\/p>\n<hr \/>\n<h3>4\ufe0f\u20e3 \u53ef\u53d8\u5173\u952e\u5b57\u53c2\u6570&#xff08;**kwargs&#xff09;<\/h3>\n<p>\u5904\u7406\u4efb\u610f\u6570\u91cf\u7684\u5173\u952e\u5b57\u53c2\u6570&#xff0c;\u6253\u5305\u6210\u5b57\u5178\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">print_info<\/span><span class=\"token punctuation\">(<\/span><span class=\"token operator\">**<\/span>info<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">for<\/span> key<span class=\"token punctuation\">,<\/span> value <span class=\"token keyword\">in<\/span> info<span class=\"token punctuation\">.<\/span>items<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string-interpolation\"><span class=\"token string\">f&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>key<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">: <\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>value<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>print_info<span class=\"token punctuation\">(<\/span>name<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Alice&#034;<\/span><span class=\"token punctuation\">,<\/span> age<span class=\"token operator\">&#061;<\/span><span class=\"token number\">25<\/span><span class=\"token punctuation\">,<\/span> city<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u5317\u4eac&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token comment\"># \u8f93\u51fa&#xff1a;<\/span><br \/>\n<span class=\"token comment\"># name: Alice<\/span><br \/>\n<span class=\"token comment\"># age: 25<\/span><br \/>\n<span class=\"token comment\"># city: \u5317\u4eac<\/span><\/p>\n<p>\u60ef\u4f8b\u7528 **kwargs\u3002<\/p>\n<hr \/>\n<h3>5\ufe0f\u20e3 \u7ec4\u5408\u53c2\u6570\u987a\u5e8f<\/h3>\n<p>\u5982\u679c\u540c\u65f6\u4f7f\u7528\u591a\u79cd\u53c2\u6570&#xff0c;\u987a\u5e8f\u5fc5\u987b\u56fa\u5b9a&#xff1a;<\/p>\n<p>\u4f4d\u7f6e\u53c2\u6570 \u2192 *args \u2192 \u9ed8\u8ba4\u53c2\u6570 \u2192 **kwargs<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">func<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span>args<span class=\"token punctuation\">,<\/span> c<span class=\"token operator\">&#061;<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token operator\">**<\/span>kwargs<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">,<\/span> args<span class=\"token punctuation\">,<\/span> c<span class=\"token punctuation\">,<\/span> kwargs<span class=\"token punctuation\">)<\/span><\/p>\n<p>func<span class=\"token punctuation\">(<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> c<span class=\"token operator\">&#061;<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> name<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Alice&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token comment\"># 1 2 (3, 4, 5) 20 {&#039;name&#039;: &#039;Alice&#039;}<\/span><\/p>\n<hr \/>\n<h3>6\ufe0f\u20e3 \u4ec5\u4f4d\u7f6e\u53c2\u6570&#xff08;Python 3.8&#043;&#xff09;<\/h3>\n<p>\u4f7f\u7528 \/ \u5206\u9694&#xff0c;\/ \u4e4b\u524d\u7684\u53c2\u6570\u53ea\u80fd\u6309\u4f4d\u7f6e\u4f20\u9012&#xff0c;\u4e0d\u80fd\u4f5c\u4e3a\u5173\u952e\u5b57\u53c2\u6570\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">power<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">\/<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> x <span class=\"token operator\">**<\/span> y<\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>power<span class=\"token punctuation\">(<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>     <span class=\"token comment\"># 8<\/span><br \/>\n<span class=\"token comment\"># print(power(x&#061;2, y&#061;3))  # \u62a5\u9519<\/span><\/p>\n<hr \/>\n<h3>7\ufe0f\u20e3 \u4ec5\u5173\u952e\u5b57\u53c2\u6570&#xff08;Keyword-Only Arguments&#xff09;<\/h3>\n<p>\u4f7f\u7528 * \u5206\u9694&#xff0c;* \u4e4b\u540e\u7684\u53c2\u6570\u5fc5\u987b\u7528\u5173\u952e\u5b57\u4f20\u9012\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">greet<\/span><span class=\"token punctuation\">(<\/span>name<span class=\"token punctuation\">,<\/span> <span class=\"token operator\">*<\/span><span class=\"token punctuation\">,<\/span> greeting<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;\u4f60\u597d&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token string-interpolation\"><span class=\"token string\">f&#034;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>greeting<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#xff0c;<\/span><span class=\"token interpolation\"><span class=\"token punctuation\">{<\/span>name<span class=\"token punctuation\">}<\/span><\/span><span class=\"token string\">&#034;<\/span><\/span><\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>greet<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Alice&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>                 <span class=\"token comment\"># \u4f60\u597d&#xff0c;Alice<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>greet<span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;Bob&#034;<\/span><span class=\"token punctuation\">,<\/span> greeting<span class=\"token operator\">&#061;<\/span><span class=\"token string\">&#034;Hello&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># Hello&#xff0c;Bob<\/span><br \/>\n<span class=\"token comment\"># print(greet(&#034;Bob&#034;, &#034;Hello&#034;))          # \u62a5\u9519<\/span><\/p>\n<hr \/>\n<h3>8\ufe0f\u20e3 \u89e3\u5305\u53c2\u6570\u8c03\u7528&#xff08;Unpacking Arguments&#xff09;<\/h3>\n<p>\u8c03\u7528\u51fd\u6570\u65f6&#xff0c;\u53ef\u4ee5\u7528 * \u89e3\u5305\u5e8f\u5217&#xff0c;** \u89e3\u5305\u5b57\u5178&#xff0c;\u5c06\u503c\u4f20\u9012\u7ed9\u53c2\u6570\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">,<\/span> c<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b <span class=\"token operator\">&#043;<\/span> c<\/p>\n<p>nums <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">]<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>add<span class=\"token punctuation\">(<\/span><span class=\"token operator\">*<\/span>nums<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>        <span class=\"token comment\"># 6<\/span><\/p>\n<p>params <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;a&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;b&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">20<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;c&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">30<\/span><span class=\"token punctuation\">}<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>add<span class=\"token punctuation\">(<\/span><span class=\"token operator\">**<\/span>params<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>     <span class=\"token comment\"># 60<\/span><\/p>\n<hr \/>\n<h2>\u4e09\u3001\u4f5c\u7528\u57df&#xff1a;\u53d8\u91cf\u7684\u201c\u5730\u76d8\u201d<\/h2>\n<h3>1\ufe0f\u20e3 LEGB \u89c4\u5219<\/h3>\n<p>Python \u67e5\u627e\u53d8\u91cf\u65f6\u6309\u7167 LEGB \u987a\u5e8f&#xff1a;<\/p>\n<ul>\n<li>Local&#xff1a;\u51fd\u6570\u5185\u90e8\u5c40\u90e8\u4f5c\u7528\u57df<\/li>\n<li>Enclosing&#xff1a;\u5916\u5c42\u5d4c\u5957\u51fd\u6570&#xff08;\u95ed\u5305\u65f6\u7528\u5230&#xff09;<\/li>\n<li>Global&#xff1a;\u5168\u5c40\u4f5c\u7528\u57df&#xff08;\u6a21\u5757\u7ea7\u522b&#xff09;<\/li>\n<li>Built-in&#xff1a;\u5185\u7f6e\u4f5c\u7528\u57df&#xff08;\u5982 print\u3001len&#xff09;<\/li>\n<\/ul>\n<p>x <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span>          <span class=\"token comment\"># \u5168\u5c40<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">outer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    y <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">20<\/span>      <span class=\"token comment\"># \u5916\u5c42\u51fd\u6570\u7684\u5c40\u90e8<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">inner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        z <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">30<\/span>  <span class=\"token comment\"># \u5185\u5c42\u5c40\u90e8<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">,<\/span> z<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u90fd\u53ef\u4ee5\u8bbf\u95ee<\/span><br \/>\n    inner<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p>outer<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<hr \/>\n<h3>2\ufe0f\u20e3 global \u58f0\u660e<\/h3>\n<p>\u5728\u51fd\u6570\u5185\u90e8\u4fee\u6539\u5168\u5c40\u53d8\u91cf&#xff0c;\u9700\u8981\u7528 global \u58f0\u660e\u3002<\/p>\n<p>count <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">0<\/span><\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">increment<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">global<\/span> count<br \/>\n    count <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">1<\/span><\/p>\n<p>increment<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>count<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 1<\/span><\/p>\n<p>\u5982\u679c\u6ca1\u6709 global&#xff0c;\u51fd\u6570\u5185\u90e8\u7684 count \u4f1a\u88ab\u5f53\u4f5c\u5c40\u90e8\u53d8\u91cf&#xff0c;\u5bfc\u81f4 UnboundLocalError\u3002<\/p>\n<hr \/>\n<h3>3\ufe0f\u20e3 nonlocal \u58f0\u660e<\/h3>\n<p>\u7528\u4e8e\u5d4c\u5957\u51fd\u6570\u4e2d\u4fee\u6539\u5916\u5c42\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">outer<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    x <span class=\"token operator\">&#061;<\/span> <span class=\"token number\">10<\/span><br \/>\n    <span class=\"token keyword\">def<\/span> <span class=\"token function\">inner<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">nonlocal<\/span> x<br \/>\n        x <span class=\"token operator\">&#043;&#061;<\/span> <span class=\"token number\">5<\/span><br \/>\n        <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span><br \/>\n    inner<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n    <span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>x<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 15<\/span><\/p>\n<p>outer<span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<hr \/>\n<h3>&#x1f9e0; \u51b7\u77e5\u8bc6&#xff1a;Python \u6ca1\u6709\u5757\u7ea7\u4f5c\u7528\u57df<\/h3>\n<p>\u5728 if\u3001for\u3001while \u5185\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf&#xff0c;\u5728\u5916\u90e8\u4f9d\u7136\u53ef\u4ee5\u8bbf\u95ee&#xff08;\u9664\u975e\u51fd\u6570\u5185\u90e8&#xff09;\u3002<\/p>\n<p><span class=\"token keyword\">if<\/span> <span class=\"token boolean\">True<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    msg <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;Hello&#034;<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>msg<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># Hello<\/span><\/p>\n<p>\u6240\u4ee5\u4e0d\u8981\u5728\u5faa\u73af\u5185\u90e8\u6ee5\u7528\u53d8\u91cf&#xff0c;\u4ee5\u514d\u610f\u5916\u8986\u76d6\u3002<\/p>\n<hr \/>\n<h2>\u56db\u3001\u9012\u5f52\u51fd\u6570&#xff1a;\u81ea\u5df1\u8c03\u7528\u81ea\u5df1<\/h2>\n<p>\u9012\u5f52\u5c31\u662f\u51fd\u6570\u8c03\u7528\u81ea\u8eab\u3002\u5fc5\u987b\u6709\u4e24\u4e2a\u8981\u7d20&#xff1a;<\/p>\n<ul>\n<li>\u57fa\u7ebf\u6761\u4ef6&#xff08;\u505c\u6b62\u9012\u5f52\u7684\u6761\u4ef6&#xff09;<\/li>\n<li>\u9012\u5f52\u6761\u4ef6&#xff08;\u8c03\u7528\u81ea\u8eab&#xff09;<\/li>\n<\/ul>\n<h3>\u793a\u4f8b&#xff1a;\u9636\u4e58<\/h3>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">factorial<\/span><span class=\"token punctuation\">(<\/span>n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> n <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">:<\/span>   <span class=\"token comment\"># \u57fa\u7ebf\u6761\u4ef6<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> <span class=\"token number\">1<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> n <span class=\"token operator\">*<\/span> factorial<span class=\"token punctuation\">(<\/span>n <span class=\"token operator\">&#8211;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u9012\u5f52\u6761\u4ef6<\/span><\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>factorial<span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 120<\/span><\/p>\n<h3>\u793a\u4f8b&#xff1a;\u6590\u6ce2\u90a3\u5951\u6570\u5217<\/h3>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">fib<\/span><span class=\"token punctuation\">(<\/span>n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token keyword\">if<\/span> n <span class=\"token operator\">&lt;&#061;<\/span> <span class=\"token number\">1<\/span><span class=\"token punctuation\">:<\/span><br \/>\n        <span class=\"token keyword\">return<\/span> n<br \/>\n    <span class=\"token keyword\">return<\/span> fib<span class=\"token punctuation\">(<\/span>n<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token operator\">&#043;<\/span> fib<span class=\"token punctuation\">(<\/span>n<span class=\"token operator\">&#8211;<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">)<\/span><\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>fib<span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 55<\/span><\/p>\n<p>\u26a0\ufe0f \u6ce8\u610f&#xff1a;Python \u9ed8\u8ba4\u9012\u5f52\u6df1\u5ea6\u9650\u5236\u7ea6 1000&#xff0c;\u53ef\u4ee5\u7528 sys.setrecursionlimit(2000) \u8c03\u6574&#xff0c;\u4f46\u4e0d\u5efa\u8bae\u5199\u592a\u6df1\u7684\u9012\u5f52&#xff0c;\u5bb9\u6613\u6808\u6ea2\u51fa\u3002<\/p>\n<hr \/>\n<h2>\u4e94\u3001\u6587\u6863\u5b57\u7b26\u4e32&#xff08;docstring&#xff09;&#xff1a;\u7ed9\u81ea\u5df1\u7559\u4e2a\u4fbf\u7b7e<\/h2>\n<p>\u51fd\u6570\u5b9a\u4e49\u7684\u7b2c\u4e00\u884c\u5b57\u7b26\u4e32&#xff08;\u7528\u4e09\u5f15\u53f7&#xff09;\u5c31\u662f\u6587\u6863\u5b57\u7b26\u4e32&#xff0c;\u7528\u6765\u63cf\u8ff0\u51fd\u6570\u529f\u80fd\u3001\u53c2\u6570\u3001\u8fd4\u56de\u503c\u3002<\/p>\n<p><span class=\"token keyword\">def<\/span> <span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>a<span class=\"token punctuation\">,<\/span> b<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">:<\/span><br \/>\n    <span class=\"token triple-quoted-string string\">&#034;&#034;&#034;\u8fd4\u56de\u4e24\u4e2a\u6570\u7684\u548c&#034;&#034;&#034;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> a <span class=\"token operator\">&#043;<\/span> b<\/p>\n<p><span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>add<span class=\"token punctuation\">.<\/span>__doc__<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u8fd4\u56de\u4e24\u4e2a\u6570\u7684\u548c<\/span><\/p>\n<p>\u53ef\u4ee5\u7528 help(add) \u67e5\u770b\u6587\u6863\u3002PEP 257 \u89c4\u5b9a\u4e86\u6587\u6863\u5b57\u7b26\u4e32\u7684\u683c\u5f0f\u3002<\/p>\n<hr \/>\n<h2>\u516d\u3001\u533f\u540d\u51fd\u6570 lambda&#xff1a;\u8f7b\u91cf\u7ea7\u5c0f\u5de5\u5177<\/h2>\n<p>\u5f53\u9700\u8981\u4e00\u4e2a\u7b80\u5355\u51fd\u6570&#xff0c;\u53c8\u4e0d\u60f3\u7528 def \u5b9a\u4e49\u65f6&#xff0c;\u53ef\u4ee5\u7528 lambda\u3002<\/p>\n<p>square <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">lambda<\/span> x<span class=\"token punctuation\">:<\/span> x <span class=\"token operator\">**<\/span> <span class=\"token number\">2<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>square<span class=\"token punctuation\">(<\/span><span class=\"token number\">5<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 25<\/span><\/p>\n<p>\u8bed\u6cd5&#xff1a;lambda \u53c2\u6570: \u8868\u8fbe\u5f0f&#xff0c;\u53ea\u80fd\u5199\u4e00\u884c&#xff0c;\u81ea\u52a8\u8fd4\u56de\u8868\u8fbe\u5f0f\u7ed3\u679c\u3002<\/p>\n<p>\u901a\u5e38\u548c\u9ad8\u9636\u51fd\u6570\u4e00\u8d77\u7528\u3002<\/p>\n<hr \/>\n<h2>\u4e03\u3001\u9ad8\u9636\u51fd\u6570\u7b80\u4ecb&#xff08;\u51fd\u6570\u5f0f\u7f16\u7a0b\u542f\u8499&#xff09;<\/h2>\n<p>\u9ad8\u9636\u51fd\u6570\u5c31\u662f\u628a\u51fd\u6570\u4f5c\u4e3a\u53c2\u6570\u6216\u8fd4\u56de\u503c\u7684\u51fd\u6570\u3002<\/p>\n<hr \/>\n<h3>1\ufe0f\u20e3 map()&#xff1a;\u6279\u91cf\u5904\u7406<\/h3>\n<p>map(func, iterable) \u5c06\u51fd\u6570\u4f5c\u7528\u4e8e\u53ef\u8fed\u4ee3\u5bf9\u8c61\u7684\u6bcf\u4e2a\u5143\u7d20&#xff0c;\u8fd4\u56de\u8fed\u4ee3\u5668\u3002<\/p>\n<p>numbers <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><br \/>\nsquared <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">map<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">lambda<\/span> x<span class=\"token punctuation\">:<\/span> x<span class=\"token operator\">**<\/span><span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> numbers<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token builtin\">list<\/span><span class=\"token punctuation\">(<\/span>squared<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># [1, 4, 9, 16]<\/span><\/p>\n<hr \/>\n<h3>2\ufe0f\u20e3 filter()&#xff1a;\u7b5b\u9009<\/h3>\n<p>filter(func, iterable) \u8fd4\u56de\u4f7f\u51fd\u6570\u8fd4\u56de True \u7684\u5143\u7d20\u3002<\/p>\n<p>numbers <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">6<\/span><span class=\"token punctuation\">]<\/span><br \/>\nevens <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">filter<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">lambda<\/span> x<span class=\"token punctuation\">:<\/span> x <span class=\"token operator\">%<\/span> <span class=\"token number\">2<\/span> <span class=\"token operator\">&#061;&#061;<\/span> <span class=\"token number\">0<\/span><span class=\"token punctuation\">,<\/span> numbers<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span><span class=\"token builtin\">list<\/span><span class=\"token punctuation\">(<\/span>evens<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># [2, 4, 6]<\/span><\/p>\n<hr \/>\n<h3>3\ufe0f\u20e3 sorted() \u7684 key \u53c2\u6570<\/h3>\n<p>sorted(iterable, key&#061;func) \u6309\u7167 key \u51fd\u6570\u7684\u8fd4\u56de\u503c\u6392\u5e8f\u3002<\/p>\n<p>students <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;Alice&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;grade&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">88<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;Bob&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;grade&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">95<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n    <span class=\"token punctuation\">{<\/span><span class=\"token string\">&#034;name&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token string\">&#034;Charlie&#034;<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token string\">&#034;grade&#034;<\/span><span class=\"token punctuation\">:<\/span> <span class=\"token number\">72<\/span><span class=\"token punctuation\">}<\/span><span class=\"token punctuation\">,<\/span><br \/>\n<span class=\"token punctuation\">]<\/span><br \/>\nsorted_by_grade <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">sorted<\/span><span class=\"token punctuation\">(<\/span>students<span class=\"token punctuation\">,<\/span> key<span class=\"token operator\">&#061;<\/span><span class=\"token keyword\">lambda<\/span> s<span class=\"token punctuation\">:<\/span> s<span class=\"token punctuation\">[<\/span><span class=\"token string\">&#034;grade&#034;<\/span><span class=\"token punctuation\">]<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>sorted_by_grade<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># \u6309\u6210\u7ee9\u5347\u5e8f<\/span><\/p>\n<hr \/>\n<h3>4\ufe0f\u20e3 reduce()&#xff08;\u4e86\u89e3\u5373\u53ef&#xff09;<\/h3>\n<p>functools.reduce(func, iterable) \u5c06\u51fd\u6570\u7d2f\u79ef\u5e94\u7528\u5230\u5143\u7d20\u4e0a&#xff0c;\u8fd4\u56de\u5355\u4e2a\u503c\u3002<\/p>\n<p><span class=\"token keyword\">from<\/span> functools <span class=\"token keyword\">import<\/span> <span class=\"token builtin\">reduce<\/span><br \/>\nnumbers <span class=\"token operator\">&#061;<\/span> <span class=\"token punctuation\">[<\/span><span class=\"token number\">1<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">2<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">3<\/span><span class=\"token punctuation\">,<\/span> <span class=\"token number\">4<\/span><span class=\"token punctuation\">]<\/span><br \/>\nproduct <span class=\"token operator\">&#061;<\/span> <span class=\"token builtin\">reduce<\/span><span class=\"token punctuation\">(<\/span><span class=\"token keyword\">lambda<\/span> x<span class=\"token punctuation\">,<\/span> y<span class=\"token punctuation\">:<\/span> x <span class=\"token operator\">*<\/span> y<span class=\"token punctuation\">,<\/span> numbers<span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">print<\/span><span class=\"token punctuation\">(<\/span>product<span class=\"token punctuation\">)<\/span>  <span class=\"token comment\"># 24<\/span><\/p>\n<p>Python 3 \u4e2d reduce \u79fb\u5230\u4e86 functools&#xff0c;\u65e5\u5e38\u7528\u5f97\u4e0d\u591a&#xff0c;\u4f46\u9762\u8bd5\u5076\u5c14\u4f1a\u95ee\u3002<\/p>\n<hr \/>\n<h2>\u516b\u3001\u51fd\u6570\u8fdb\u9636\u9884\u544a<\/h2>\n<p>\u672c\u7ae0\u7684\u51fd\u6570\u57fa\u7840\u7bc7\u6ca1\u6709\u6d89\u53ca&#xff1a;<\/p>\n<ul>\n<li>\u88c5\u9970\u5668&#xff08;\u52a8\u6001\u589e\u5f3a\u51fd\u6570&#xff09;<\/li>\n<li>\u751f\u6210\u5668\u51fd\u6570&#xff08;yield&#xff09;<\/li>\n<li>\u95ed\u5305<\/li>\n<\/ul>\n<p>\u8fd9\u4e9b\u5c06\u5728\u7b2c10\u7ae0 \u9ad8\u7ea7\u7279\u6027 \u4e2d\u5c55\u5f00\u3002<\/p>\n<hr \/>\n<h2>\u2705 \u672c\u7ae0\u603b\u7ed3<\/h2>\n<table>\n<tr>\u6982\u5ff5\u8bf4\u660e<\/tr>\n<tbody>\n<tr>\n<td>\u5b9a\u4e49\u51fd\u6570<\/td>\n<td>def &#043; \u51fd\u6570\u540d &#043; \u53c2\u6570 &#043; \u5192\u53f7 &#043; \u7f29\u8fdb\u4f53<\/td>\n<\/tr>\n<tr>\n<td>\u8fd4\u56de\u503c<\/td>\n<td>return&#xff0c;\u65e0 return \u8fd4\u56de None<\/td>\n<\/tr>\n<tr>\n<td>\u4f4d\u7f6e\u53c2\u6570<\/td>\n<td>\u6309\u987a\u5e8f\u8d4b\u503c<\/td>\n<\/tr>\n<tr>\n<td>\u9ed8\u8ba4\u53c2\u6570<\/td>\n<td>param&#061;value&#xff0c;\u6ce8\u610f\u53ef\u53d8\u9ed8\u8ba4\u503c\u7684\u5751<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u53d8\u4f4d\u7f6e\u53c2\u6570<\/td>\n<td>*args \u6536\u96c6\u591a\u4f59\u4f4d\u7f6e\u53c2\u6570\u4e3a\u5143\u7ec4<\/td>\n<\/tr>\n<tr>\n<td>\u53ef\u53d8\u5173\u952e\u5b57\u53c2\u6570<\/td>\n<td>**kwargs \u6536\u96c6\u591a\u4f59\u5173\u952e\u5b57\u53c2\u6570\u4e3a\u5b57\u5178<\/td>\n<\/tr>\n<tr>\n<td>\u4ec5\u4f4d\u7f6e\u53c2\u6570<\/td>\n<td>\/ \u4e4b\u524d\u53c2\u6570\u4e0d\u80fd\u4f5c\u5173\u952e\u5b57<\/td>\n<\/tr>\n<tr>\n<td>\u4ec5\u5173\u952e\u5b57\u53c2\u6570<\/td>\n<td>* \u4e4b\u540e\u53c2\u6570\u5fc5\u987b\u7528\u5173\u952e\u5b57<\/td>\n<\/tr>\n<tr>\n<td>\u89e3\u5305\u53c2\u6570<\/td>\n<td>\u8c03\u7528\u65f6 *seq **dict<\/td>\n<\/tr>\n<tr>\n<td>\u4f5c\u7528\u57df<\/td>\n<td>LEGB \u89c4\u5219<\/td>\n<\/tr>\n<tr>\n<td>global<\/td>\n<td>\u4fee\u6539\u5168\u5c40\u53d8\u91cf<\/td>\n<\/tr>\n<tr>\n<td>nonlocal<\/td>\n<td>\u4fee\u6539\u5916\u5c42\u5d4c\u5957\u53d8\u91cf<\/td>\n<\/tr>\n<tr>\n<td>\u9012\u5f52<\/td>\n<td>\u81ea\u5df1\u8c03\u7528\u81ea\u5df1&#xff0c;\u6709\u57fa\u7ebf\u6761\u4ef6<\/td>\n<\/tr>\n<tr>\n<td>\u6587\u6863\u5b57\u7b26\u4e32<\/td>\n<td>\u4e09\u5f15\u53f7\u5199\u5728\u51fd\u6570\u5f00\u5934<\/td>\n<\/tr>\n<tr>\n<td>lambda<\/td>\n<td>\u533f\u540d\u51fd\u6570&#xff0c;\u4e00\u884c\u8868\u8fbe\u5f0f<\/td>\n<\/tr>\n<tr>\n<td>\u9ad8\u9636\u51fd\u6570<\/td>\n<td>map\u3001filter\u3001sorted key\u3001reduce<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u51fd\u6570\u662f\u6a21\u5757\u5316\u7f16\u7a0b\u7684\u57fa\u77f3\u3002\u73b0\u5728\u4f60\u53ef\u4ee5\u628a\u590d\u6742\u4efb\u52a1\u62c6\u89e3\u6210\u4e00\u4e2a\u4e2a\u5c0f\u51fd\u6570&#xff0c;\u50cf\u642d\u79ef\u6728\u4e00\u6837\u6784\u5efa\u7a0b\u5e8f\u3002<\/p>\n<hr \/>\n<h3>&#x1f680; \u4e0b\u96c6\u9884\u544a<\/h3>\n<p>\u4e0b\u4e00\u7ae0\u6211\u4eec\u5c06\u5b66\u4e60 \u6a21\u5757\u4e0e\u5305\u2014\u2014\u5982\u4f55\u628a\u51fd\u6570\u7ec4\u7ec7\u6210\u6587\u4ef6&#xff0c;\u5982\u4f55\u5bfc\u5165\u522b\u4eba\u5199\u597d\u7684\u8f6e\u5b50&#xff0c;\u4ee5\u53ca Python \u6807\u51c6\u5e93\u7684\u51b0\u5c71\u4e00\u89d2\u3002\u4ece\u6b64\u4f60\u7684\u4ee3\u7801\u53ef\u4ee5\u7ad9\u5728\u5de8\u4eba\u7684\u80a9\u8180\u4e0a&#xff01;<\/p>\n<p>\u8bb0\u5f97\u591a\u7ec3\u4e60&#xff1a;\u5199\u51e0\u4e2a\u51fd\u6570\u7ec3\u4e60\u53c2\u6570\u4f20\u9012&#xff0c;\u8bd5\u8bd5\u9012\u5f52\u89e3\u51b3\u6c49\u8bfa\u5854\u95ee\u9898&#xff0c;\u7528 lambda \u548c map\/filter \u5904\u7406\u6570\u636e\u3002\u51fd\u6570\u5199\u591a\u4e86&#xff0c;\u4f60\u4f1a\u7231\u4e0a\u8fd9\u79cd\u201c\u5199\u4e00\u6b21&#xff0c;\u7528\u4e00\u8f88\u5b50\u201d\u7684\u611f\u89c9&#xff01;\u2728<\/p>\n<hr \/>\n<p>&#x1f517; 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