{"id":69198,"date":"2024-01-22T11:09:53","date_gmt":"2024-01-22T03:09:53","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=69198"},"modified":"2024-01-22T11:09:53","modified_gmt":"2024-01-22T03:09:53","slug":"python%e5%bc%82%e5%b8%b8%e5%a4%84%e7%90%86%e4%b8%adfinally%e7%9a%84%e4%bd%9c%e7%94%a8","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/69198.html","title":{"rendered":"python\u5f02\u5e38\u5904\u7406\u4e2dfinally\u7684\u4f5c\u7528"},"content":{"rendered":"<p><strong>Python\u5f02\u5e38\u5904\u7406\u4e2dfinally\u7684\u4f5c\u7528\u5305\u62ec\uff1a1\u3001\u786e\u4fdd\u7a0b\u5e8f\u5757\u9000\u51fa\u524d\u7684\u4ee3\u7801\u6267\u884c\u30012\u3001\u8d44\u6e90\u91ca\u653e\u548c\u6e05\u7406\u5de5\u4f5c\u30013\u3001\u4e0ereturn\u8bed\u53e5\u7684\u4ea4\u4e92\u884c\u4e3a<\/strong>\u3002\u5728finally\u5b50\u53e5\u4e2d\u6700\u4e3a\u5178\u578b\u7684\u5e94\u7528\u662f\u6e05\u7406\u8d44\u6e90\uff0c\u6bd4\u5982\u5173\u95ed\u6587\u4ef6\u6d41\u6216\u6570\u636e\u5e93\u8fde\u63a5\u3002\u4e0d\u8bbatry\u5757\u5185\u4ee3\u7801\u662f\u5426\u89e6\u53d1\u4e86\u5f02\u5e38\uff0cfinally\u5b50\u53e5\u90fd\u4f1a\u88ab\u6267\u884c\uff0c\u8fd9\u4e3a\u7a0b\u5e8f\u5458\u63d0\u4f9b\u4e00\u79cd\u53ef\u9760\u7684\u624b\u6bb5\u6765\u91ca\u653e\u8d44\u6e90\uff0c\u786e\u4fdd\u7a0b\u5e8f\u7684\u5065\u58ee\u6027\u3002<\/p>\n<p><strong>\u4e00\u3001\u6982\u89c8<\/strong><\/p>\n<p>\u5728Python\u7f16\u7a0b\u4e2d\uff0c\u5f02\u5e38\u5904\u7406\u662f\u4fdd\u8bc1\u4ee3\u7801\u7a33\u5b9a\u8fd0\u884c\u7684\u5173\u952e\u673a\u5236\u3002\u4f7f\u7528try\u3001except\u6765\u6355\u83b7\u5e76\u5904\u7406\u5f02\u5e38\uff0c\u800cfinally\u5219\u7528\u4e8e\u5b9a\u4e49\u65e0\u8bba\u5f02\u5e38\u662f\u5426\u53d1\u751f\u90fd\u9700\u8981\u6267\u884c\u7684\u4ee3\u7801\u3002\u901a\u8fc7\u4f7f\u7528finally\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u7f16\u5199\u51fa\u6e05\u6670\u548c\u53ef\u7ef4\u62a4\u7684\u5f02\u5e38\u5904\u7406\u903b\u8f91\u3002<\/p>\n<p><strong>\u4e8c\u3001\u786e\u4fdd\u4ee3\u7801\u6267\u884c<\/strong><\/p>\n<p>\u4e0d\u8bbatry\u5757\u4e2d\u7684\u7a0b\u5e8f\u662f\u5426\u53d1\u751f\u4e86\u5f02\u5e38\uff0cfinally\u5757\u5185\u7684\u4ee3\u7801\u603b\u662f\u4f1a\u6267\u884c\u3002\u8fd9\u5bf9\u4e8e\u67d0\u4e9b\u5fc5\u987b\u8fd0\u884c\u7684\u4ee3\u7801\u975e\u5e38\u91cd\u8981\uff0c\u6bd4\u5982\u8bf4\u91ca\u653e\u8d44\u6e90\uff0c\u8bb0\u5f55\u65e5\u5fd7\u7b49\u3002<\/p>\n<p><strong>\u4e09\u3001\u8d44\u6e90\u91ca\u653e\u548c\u6e05\u7406<\/strong><\/p>\n<p>\u5728\u8fdb\u884c\u6587\u4ef6\u64cd\u4f5c\u6216\u6570\u636e\u5e93\u8fde\u63a5\u7b49\u9700\u8981\u624b\u52a8\u91ca\u653e\u7684\u64cd\u4f5c\u65f6\uff0cfinally\u5b50\u53e5\u6210\u4e3a\u8d44\u6e90\u91ca\u653e\u7684\u7406\u60f3\u4f4d\u7f6e\u3002\u8fd9\u6837\u5373\u4fbf\u5728\u8d44\u6e90\u88ab\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u53d1\u751f\u4e86\u5f02\u5e38\uff0c\u7531\u4e8efinally\u603b\u4f1a\u6267\u884c\uff0c\u8d44\u6e90\u4fbf\u80fd\u591f\u5f97\u5230\u59a5\u5584\u7684\u5904\u7406\u3002<\/p>\n<p><strong>\u56db\u3001\u4e0eRETURN\u8bed\u53e5\u7684\u4ea4\u4e92<\/strong><\/p>\n<p>\u5728try\u6216except\u5757\u4e2d\uff0c\u5982\u679c\u9047\u5230return\u8bed\u53e5\uff0cPython\u4f1a\u5728\u8fd4\u56de\u524d\u5148\u6267\u884cfinally\u5757\u3002\u56e0\u6b64\uff0cfinally\u5728\u51fd\u6570\u8fd4\u56de\u503c\u8bbe\u8ba1\u4e2d\u8d77\u7740\u4e0d\u53ef\u6216\u7f3a\u7684\u4f5c\u7528\uff0c\u5b83\u80fd\u591f\u786e\u4fdd\u6240\u6709\u5fc5\u8981\u7684\u6e05\u7406\u5de5\u4f5c\u5728\u51fd\u6570\u8fd4\u56de\u7ed3\u679c\u524d\u5b8c\u6210\u3002<\/p>\n<p><strong>\u4e94\u3001\u4e3e\u4f8b\u8bf4\u660e<\/strong><\/p>\n<p>\u4e3a\u4e86\u6df1\u5165\u7406\u89e3finally\u7684\u7528\u9014\uff0c\u6211\u4eec\u53ef\u901a\u8fc7\u5b9e\u9645\u4ee3\u7801\u793a\u4f8b\u6765\u9610\u660e\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u548c\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\u7684\u8868\u73b0\u3002<\/p>\n<p>\u4e00\u6bb5\u7b80\u5355\u7684\u4ee3\u7801\uff0c\u7528\u6765\u89e3\u91ca\u5728\u6587\u4ef6\u64cd\u4f5c\u4e2d\u7684\u5e94\u7528\uff1a<\/p>\n<p>&#8220;`python<\/p>\n<p>def read_file(file_path):<\/p>\n<p>    try:<\/p>\n<p>        f = open(file_path, &#8216;r&#8217;)<\/p>\n<p>        data = f.read()<\/p>\n<p>        return data<\/p>\n<p>    except IOError as e:<\/p>\n<p>        print(&#8220;Error reading file&#8221;, e)<\/p>\n<p>        return None<\/p>\n<p>    finally:<\/p>\n<p>        if &#8216;f&#8217; in locals():<\/p>\n<p>            f.close()<\/p>\n<p>            print(&#8220;File is closed&#8221;)<\/p>\n<p>&#8220;`<\/p>\n<p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u65e0\u8bba\u6587\u4ef6\u64cd\u4f5c\u662f\u5426\u6210\u529f\uff0cfinally\u5b50\u53e5\u90fd\u4fdd\u8bc1\u4e86\u6587\u4ef6\u6d41\u6700\u7ec8\u88ab\u5173\u95ed\u3002\u8fd9\u907f\u514d\u4e86\u56e0\u4e3a\u6587\u4ef6\u672a\u6b63\u786e\u5173\u95ed\u800c\u5bfc\u81f4\u7684\u8d44\u6e90\u6cc4\u9732\u3002<\/p>\n<p><strong>\u516d\u3001\u7ec6\u8282\u63a2\u8ba8<\/strong><\/p>\n<p>\u6df1\u5165\u63a2\u8ba8finally\u5728\u5f02\u5e38\u5904\u7406\u673a\u5236\u4e2d\u7684\u66f4\u591a\u7ec6\u8282\uff0c\u5305\u62ec\u5b83\u4e0e\u7cfb\u7edf\u8d44\u6e90\u3001\u591a\u5c42\u5d4c\u5957\u5f02\u5e38\u5904\u7406\u7ed3\u6784\u7684\u4e92\u52a8\uff0c\u4ee5\u53ca\u5728\u5b9e\u9645\u4f01\u4e1a\u7ea7\u5f00\u53d1\u4e2d\u5e94\u5bf9\u590d\u6742\u60c5\u51b5\u7684\u7b56\u7565\u3002<\/p>\n<p>\u7efc\u4e0a\u6240\u8ff0\uff0cfinally\u5728Python\u7684\u5f02\u5e38\u5904\u7406\u4e2d\u626e\u6f14\u7740\u4e0d\u53ef\u6216\u7f3a\u7684\u89d2\u8272\u3002\u5b83\u7684\u5b58\u5728\u4f7f\u5f97\u7f16\u5199\u7684\u4ee3\u7801\u66f4\u52a0\u5065\u58ee\uff0c\u903b\u8f91\u66f4\u52a0\u6e05\u6670\uff0c<a href=\"https:\/\/docs.pingcode.com\/blog\/project-management\/58557.html\" target=\"_blank\">\u8d44\u6e90\u7ba1\u7406<\/a>\u66f4\u52a0\u6709\u6548\u7387\u3002\u638c\u63e1finally\u7684\u4f7f\u7528\uff0c\u5bf9\u4e8e\u4efb\u4f55\u5e0c\u671b\u63d0\u9ad8\u4ee3\u7801\u8d28\u91cf\u7684Python\u5f00\u53d1\u8005\u6765\u8bf4\u90fd\u662f\u5fc5\u987b\u7684\u3002<\/p>\n<p> <strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><strong>\u5728Python\u5f02\u5e38\u5904\u7406\u4e2d\uff0cfinally\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<\/strong><br \/>\n1. \u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528finally\u5173\u952e\u5b57\u6765\u5904\u7406\u5f02\u5e38\uff1f<\/p>\n<p>\u5728Python\u4e2d\uff0cfinally\u5173\u952e\u5b57\u7528\u4e8e\u5b9a\u4e49\u65e0\u8bba\u662f\u5426\u53d1\u751f\u5f02\u5e38\u90fd\u9700\u8981\u6267\u884c\u7684\u4ee3\u7801\u5757\u3002\u65e0\u8bbatry\u4ee3\u7801\u5757\u4e2d\u662f\u5426\u53d1\u751f\u4e86\u5f02\u5e38\uff0cfinally\u4e2d\u7684\u4ee3\u7801\u90fd\u4f1a\u88ab\u6267\u884c\uff0c\u8fd9\u6709\u52a9\u4e8e\u786e\u4fdd\u8d44\u6e90\u7684\u91ca\u653e\u6216\u8005\u6e05\u7406\u64cd\u4f5c\u80fd\u591f\u88ab\u6b63\u786e\u6267\u884c\u3002<\/p>\n<p>2. finally\u5757\u4e0etry\u548cexcept\u642d\u914d\u4f7f\u7528\u6709\u4ec0\u4e48\u4f18\u52bf\uff1f<\/p>\n<p>finally\u5757\u7684\u5b58\u5728\u53ef\u4ee5\u786e\u4fdd\u5728\u53d1\u751f\u5f02\u5e38\u65f6\u4e5f\u80fd\u591f\u6267\u884c\u4e00\u4e9b\u5fc5\u8981\u7684\u6e05\u7406\u6b65\u9aa4\uff0c\u6bd4\u5982\u5173\u95ed\u6587\u4ef6\u3001\u91ca\u653e\u8d44\u6e90\u7b49\u3002\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u7a33\u5b9a\u6027\uff0c\u786e\u4fdd\u5373\u4f7f\u53d1\u751f\u5f02\u5e38\u4e5f\u4e0d\u4f1a\u9020\u6210\u8d44\u6e90\u6cc4\u6f0f\u6216\u672a\u5b8c\u6210\u7684\u64cd\u4f5c\u3002<\/p>\n<p>3. \u4ec0\u4e48\u65f6\u5019\u9002\u5408\u4f7f\u7528finally\u5173\u952e\u5b57\u6765\u5904\u7406\u5f02\u5e38\uff1f<\/p>\n<p>\u5728\u9700\u8981\u8fdb\u884c\u8d44\u6e90\u6e05\u7406\u6216\u91ca\u653e\u7684\u60c5\u51b5\u4e0b\uff0c\u901a\u5e38\u4f1a\u9009\u62e9\u4f7f\u7528finally\u6765\u786e\u4fdd\u8fd9\u4e9b\u6e05\u7406\u6b65\u9aa4\u4e00\u5b9a\u4f1a\u88ab\u6267\u884c\u3002\u6bd4\u5982\u5728\u6587\u4ef6\u64cd\u4f5c\u3001\u6570\u636e\u5e93\u8fde\u63a5\u3001\u7f51\u7edc\u8fde\u63a5\u7b49\u573a\u666f\u4e0b\uff0cfinally\u5757\u53ef\u4ee5\u7528\u6765\u786e\u4fdd\u8d44\u6e90\u7684\u6b63\u786e\u91ca\u653e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"Python\u5f02\u5e38\u5904\u7406\u4e2dfinally\u7684\u4f5c\u7528\u5305\u62ec\uff1a1\u3001\u786e\u4fdd\u7a0b\u5e8f\u5757\u9000\u51fa\u524d\u7684\u4ee3\u7801\u6267\u884c\u30012\u3001\u8d44\u6e90\u91ca\u653e\u548c\u6e05\u7406\u5de5\u4f5c\u30013\u3001\u4e0e [&hellip;]","protected":false},"author":1,"featured_media":69200,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/69198"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=69198"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/69198\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/69200"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=69198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=69198"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=69198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}