{"id":204202,"date":"2025-05-29T14:11:21","date_gmt":"2025-05-29T06:11:21","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204202\/"},"modified":"2025-05-29T14:11:21","modified_gmt":"2025-05-29T06:11:21","slug":"python%e4%b8%adeval%e5%87%bd%e6%95%b0%e5%a6%82%e4%bd%95%e5%a4%84%e7%90%86%e4%b8%8a%e4%b8%8b%e6%96%87%e5%8f%a5%e6%9f%84%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204202\/","title":{"rendered":"Python\u4e2deval()\u51fd\u6570\u5982\u4f55\u5904\u7406\u4e0a\u4e0b\u6587\u53e5\u67c4\uff1f"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Python\u4e2deval()\u51fd\u6570\u5982\u4f55\u5904\u7406\u4e0a\u4e0b\u6587\u53e5\u67c4\uff1f<\/h1>\n<p>\u6b22\u8fce\u5404\u4f4d\u5c0f\u4f19\u4f34\u6765\u5230\uff0c\u76f8\u805a\u4e8e\u6b64\u90fd\u662f\u7f18\u54c8\u54c8\u54c8\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\uff0c\u8fd9\u7bc7\u6587\u7ae0\u4e3b\u8981\u8bb2\u5230<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\"><\/span>\u7b49\u7b49\u77e5\u8bc6\uff0c\u5982\u679c\u4f60\u5bf9<span style=\"color: #FF6600;, Helvetica, Arial, sans-serif;font-size: 14px;background-color: #FFFFFF\">\u6587\u7ae0<\/span>\u76f8\u5173\u7684\u77e5\u8bc6\u975e\u5e38\u611f\u5174\u8da3\u6216\u8005\u6b63\u5728\u81ea\u5b66\uff0c\u90fd\u53ef\u4ee5\u5173\u6ce8\u6211\uff0c\u6211\u4f1a\u6301\u7eed\u66f4\u65b0\u76f8\u5173\u6587\u7ae0\uff01\u5f53\u7136\uff0c\u6709\u4ec0\u4e48\u5efa\u8bae\u4e5f\u6b22\u8fce\u5728\u8bc4\u8bba\u7559\u8a00\u63d0\u51fa\uff01\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241031\/17303814206723866cc6eee.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>python\u4e2deval()\u51fd\u6570\u7684\u4e0a\u4e0b\u6587\u53e5\u67c4<\/strong><\/p>\n<p>\u5728python\u4e2d\u4f7f\u7528eval()\u51fd\u6570\u65f6\uff0c\u53ef\u80fd\u4f1a\u9047\u5230\u7531\u4e8e\u4e0a\u4e0b\u6587\u73af\u5883\u5bfc\u81f4\u7684\u9519\u8bef\u3002\u5176\u4e2d\u9047\u5230\u7684\u4e00\u4e2a\u5e38\u89c1\u95ee\u9898\u662f\u5728\u76f4\u63a5\u8c03\u7528eval()\u51fd\u6570\u65f6\uff0c\u65e0\u6cd5\u627e\u5230\u53d8\u91cf\u503c\u3002<\/p>\n<p><strong>\u6848\u4f8b<\/strong><\/p>\n<p>\u5982\u56fe\u6240\u793a\uff0c\u4ee3\u7801\u4e2d\u4f7f\u7528eval()\u51fd\u6570\u8fdb\u884c\u5b57\u7b26\u4e32\u8868\u8fbe\u5f0f\u8ba1\u7b97\uff0c\u4f46\u76f4\u63a5\u8c03\u7528\u5374\u5931\u8d25\u3002<\/p>\n<p><strong>\u539f\u56e0<\/strong><\/p>\n<p>eval()\u51fd\u6570\u9700\u8981\u5728\u4e0a\u4e0b\u6587\u4e2d\u67e5\u627e\u53d8\u91cf\u7684\u503c\u3002\u5728\u8be5\u4ee3\u7801\u4e2d\uff0c\u53d8\u91cfa\u548cb\u6ca1\u6709\u5728\u4e0a\u4e0b\u6587\u4e2d\u5b9a\u4e49\uff0c\u56e0\u6b64eval()\u51fd\u6570\u65e0\u6cd5\u627e\u5230\u5176\u503c\u3002<\/p>\n<p><strong>\u89e3\u51b3\u65b9\u6cd5<\/strong><\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u9700\u8981\u5728eval()\u51fd\u6570\u4e2d\u63d0\u4f9b\u4e00\u4e2a\u5b57\u5178\u5bf9\u8c61\u4f5c\u4e3a\u5168\u5c40\u547d\u540d\u7a7a\u95f4\uff0c\u5176\u4e2d\u5305\u542b\u6240\u7528\u53d8\u91cf\u7684\u503c\u3002<\/p>\n<pre>r = str(eval('a + b', {'a': a, 'b': b}))<\/pre>\n<p>\u901a\u8fc7\u63d0\u4f9b\u5168\u5c40\u547d\u540d\u7a7a\u95f4\uff0ceval()\u51fd\u6570\u80fd\u591f\u627e\u5230\u53d8\u91cfa\u548cb\u7684\u503c\uff0c\u5e76\u6b63\u786e\u8ba1\u7b97\u8868\u8fbe\u5f0f\u3002<\/p>\n<p><strong>\u6ce8\u610f\u4e8b\u9879<\/strong><\/p>\n<p>\u9700\u6ce8\u610f\u7684\u662f\uff0ceval()\u51fd\u6570\u5728\u6267\u884c\u65f6\u5177\u6709\u5f88\u9ad8\u7684\u6f5c\u5728\u98ce\u9669\uff0c\u56e0\u4e3a\u5b83\u53ef\u4ee5\u8fd0\u884c\u4efb\u610fpython\u4ee3\u7801\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528eval()\u51fd\u6570\u65f6\uff0c\u5e94\u8be5\u8c28\u614e\u5904\u7406\u8f93\u5165\u5e76\u91c7\u53d6\u9002\u5f53\u7684\u5b89\u5168\u63aa\u65bd\u3002<\/p>\n<p>\u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aPython\u4e2deval()\u51fd\u6570\u5982\u4f55\u5904\u7406\u4e0a\u4e0b\u6587\u53e5\u67c4\uff1f\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u516c\u4f17\u53f7\u5427\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python\u4e2deval()\u51fd\u6570\u5982&#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-204202","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204202","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=204202"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204202\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}