{"id":204359,"date":"2025-05-29T15:23:12","date_gmt":"2025-05-29T07:23:12","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204359\/"},"modified":"2025-05-29T15:23:12","modified_gmt":"2025-05-29T07:23:12","slug":"python-%e4%b8%ad%e7%9a%84-eval-%e5%87%bd%e6%95%b0%e4%b8%ba%e4%bd%95%e4%bc%9a%e4%ba%a7%e7%94%9f%e5%a5%87%e6%80%aa%e7%9a%84%e7%bb%93%e6%9e%9c%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204359\/","title":{"rendered":"Python \u4e2d\u7684 eval \u51fd\u6570\u4e3a\u4f55\u4f1a\u4ea7\u751f\u5947\u602a\u7684\u7ed3\u679c\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

Python \u4e2d\u7684 eval \u51fd\u6570\u4e3a\u4f55\u4f1a\u4ea7\u751f\u5947\u602a\u7684\u7ed3\u679c\uff1f<\/h1>\n

\u4e00\u5206\u8015\u8018\uff0c\u4e00\u5206\u6536\u83b7\uff01\u65e2\u7136\u90fd\u6253\u5f00\u8fd9\u7bc7\uff0c\u5c31\u575a\u6301\u770b\u4e0b\u53bb\uff0c\u5b66\u4e0b\u53bb\u5427\uff01\u672c\u6587\u4e3b\u8981\u4f1a\u7ed9\u5927\u5bb6\u8bb2\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5927\u5bb6\u5bf9\u672c\u6587\u6709\u597d\u7684\u5efa\u8bae\u6216\u8005\u770b\u5230\u6709\u4e0d\u8db3\u4e4b\u5904\uff0c\u975e\u5e38\u6b22\u8fce\u5927\u5bb6\u79ef\u6781\u63d0\u51fa\uff01\u5728\u540e\u7eed\u6587\u7ae0\u6211\u4f1a\u7ee7\u7eed\u66f4\u65b0\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u5185\u5bb9\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u90fd\u6709\u6240\u5e2e\u52a9\uff01<\/p>\n

<\/p>\n

Py\u4e2d\u7684eval\u51fd\u6570\uff1a\u4e3a\u4f55\u4f1a\u6709\u5947\u602a\u7684\u7ed3\u679c\uff1f<\/strong><\/p>\n

eval\u51fd\u6570\u5728Python\u4e2d\u662f\u4e00\u4e2a\u5185\u5efa\u51fd\u6570\uff0c\u7528\u6765\u6267\u884c\u4e00\u4e2a\u5b57\u7b26\u4e32\u8868\u8fbe\u5f0f\uff0c\u5e76\u5c06\u7ed3\u679c\u4f5c\u4e3a\u503c\u8fd4\u56de\u3002\u5b83\u80fd\u5e26\u6765\u4e0d\u5c11\u4fbf\u5229\uff0c\u4f46\u6709\u65f6\u4e5f\u4f1a\u56e0\u5176\u884c\u4e3a\u800c\u4ee4\u4eba\u8d39\u89e3\u3002<\/p>\n

\u5728\u7ed9\u51fa\u7684\u793a\u4f8b\u4e2d\uff0ceval(“12+45″+”12”)\u7684\u7ed3\u679c\u662f4524\uff0c\u800c\u4e0d\u662f\u9884\u671f\u768479\u3002\u8fd9\u662f\u56e0\u4e3aeval\u51fd\u6570\u6309\u987a\u5e8f\u6267\u884c\u8868\u8fbe\u5f0f\u3002\u5b83\u9996\u5148\u8ba1\u7b97 “12+45″\uff0c\u7ed3\u679c\u4e3a57\uff0c\u7136\u540e\u5c06 “12” \u62fc\u63a5\u5230\u7ed3\u679c\u4e0a\uff0c\u5f97\u5230 “5712”\u3002\u6700\u540e\uff0c\u5b83\u6267\u884ceval(“5712”)\uff0c\u7ed3\u679c\u4e3a4524\u3002<\/p>\n

\u53e6\u4e00\u4e2a\u793a\u4f8b\u4e2d\uff0ceval(“1+2″+”10”)\u7684\u7ed3\u679c\u662f211\uff0c\u800c\u4e0d\u662f31\u3002\u8fd9\u540c\u6837\u662f\u7531\u4e8eeval\u51fd\u6570\u7684\u6309\u5e8f\u6267\u884c\u3002\u5b83\u9996\u5148\u8ba1\u7b97 “1+2″\uff0c\u7ed3\u679c\u4e3a3\uff0c\u7136\u540e\u5c06 “10” \u62fc\u63a5\u5230\u7ed3\u679c\u4e0a\uff0c\u5f97\u5230 “310”\u3002\u6700\u540e\uff0c\u5b83\u6267\u884ceval(“310”)\uff0c\u7ed3\u679c\u4e3a211\u3002<\/p>\n

\u8981\u89e3\u51b3\u6b64\u7c7b\u95ee\u9898\uff0c\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u62ec\u53f7\u63a7\u5236\u8868\u8fbe\u5f0f\u7684\u6267\u884c\u987a\u5e8f\u3002\u4f8b\u5982\uff0ceval(“(“+'”12+45″‘+” + “‘+'”12″‘”)”) \u5c06\u6b63\u786e\u5730\u8ba1\u7b97\u4e3a79\u3002\u53e6\u4e00\u79cd\u65b9\u6cd5\u662f\u4f7f\u7528\u52a0\u6cd5\u8fd0\u7b97\u7b26 (+) \u8fde\u63a5\u6570\u5b57\uff0c\u800c\u4e0d\u662f\u4f7f\u7528\u5b57\u7b26\u4e32\u62fc\u63a5 (+)\u3002<\/p>\n

\u6587\u4e2d\u5173\u4e8e\u7684\u77e5\u8bc6\u4ecb\u7ecd\uff0c\u5e0c\u671b\u5bf9\u4f60\u7684\u5b66\u4e60\u6709\u6240\u5e2e\u52a9\uff01\u82e5\u662f\u53d7\u76ca\u532a\u6d45\uff0c\u90a3\u5c31\u52a8\u52a8\u9f20\u6807\u6536\u85cf\u8fd9\u7bc7\u300aPython \u4e2d\u7684 eval \u51fd\u6570\u4e3a\u4f55\u4f1a\u4ea7\u751f\u5947\u602a\u7684\u7ed3\u679c\uff1f\u300b\u6587\u7ae0\u5427\uff0c\u4e5f\u53ef\u5173\u6ce8\u516c\u4f17\u53f7\u4e86\u89e3\u76f8\u5173\u6280\u672f\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Python \u4e2d\u7684 eval \u51fd...<\/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-204359","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204359","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=204359"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204359\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}