{"id":3582,"date":"2025-05-28T15:11:58","date_gmt":"2025-06-04T07:51:58","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3582"},"modified":"2025-06-04T15:11:58","modified_gmt":"2025-06-04T07:51:58","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84fileexistserror%e5%87%bd%e6%95%b8%e5%8a%9f%e8%83%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84fileexistserror%e5%87%bd%e6%95%b8%e5%8a%9f%e8%83%bd\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 FileExistsError \u932f\u8aa4\u8655\u7406\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"

<\/p>\n

\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 FileExistsError \u932f\u8aa4\u8655\u7406\u8207\u6700\u4f73\u5be6\u8e10<\/h1>\n

\u5728 Python \u4e2d\uff0cFileExistsError \u662f\u4e00\u500b\u5e38\u898b\u7684\u4f8b\u5916\uff0c\u7576\u4f60\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u5b58\u5728\u7684\u6a94\u6848\u6642\uff0c\u9019\u500b\u932f\u8aa4\u5c31\u6703\u88ab\u89f8\u767c\u3002\u4e86\u89e3\u5982\u4f55\u6709\u6548\u5730\u6aa2\u67e5\u6a94\u6848\u662f\u5426\u5b58\u5728\uff0c\u4ee5\u53ca\u5982\u4f55\u59a5\u5584\u8655\u7406 FileExistsError \u932f\u8aa4\uff0c\u5c0d\u65bc\u4efb\u4f55 Python \u958b\u767c\u8005\u800c\u8a00\u90fd\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u672c\u7bc7\u6587\u7ae0\u5c07\u4ecb\u7d39 2025 \u5e74\u6700\u65b0\u7684\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10\uff0c\u5e6b\u52a9\u4f60\u5728\u6a94\u6848\u64cd\u4f5c\u4e2d\u907f\u514d\u5e38\u898b\u932f\u8aa4\u3002<\/p>\n

\u6aa2\u67e5\u6a94\u6848\u662f\u5426\u5b58\u5728<\/h2>\n

Python \u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u6a19\u6e96\u5eab `os`\uff0c\u5176\u4e2d\u7684 `os.path.exists()` \u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u6aa2\u67e5\u6a94\u6848\u662f\u5426\u5b58\u5728\u3002\u9019\u662f\u4e00\u500b\u7c21\u55ae\u800c\u6709\u6548\u7684\u65b9\u6cd5\uff0c\u80fd\u5920\u907f\u514d\u5728\u5275\u5efa\u6a94\u6848\u6642\u5f15\u767c FileExistsError\u3002<\/p>\n

\u4ee5\u4e0b\u662f\u4f7f\u7528 `os.path.exists()` \u51fd\u6578\u7684\u7bc4\u4f8b\uff1a<\/p>\n

“`python
\nimport os<\/p>\n

file_path = ‘myfile.txt’<\/p>\n

if os.path.exists(file_path):
\n print(‘\u6a94\u6848\u5df2\u5b58\u5728\uff01’)
\nelse:
\n print(‘\u6a94\u6848\u4e0d\u5b58\u5728\uff0c\u6b63\u5728\u5275\u5efa\u6a94\u6848…’)
\n with open(file_path, ‘w’) as f:
\n f.write(‘\u9019\u662f\u65b0\u5275\u5efa\u7684\u6a94\u6848\u5167\u5bb9\u3002’)
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u6aa2\u67e5 `myfile.txt` \u662f\u5426\u5b58\u5728\u3002\u5982\u679c\u4e0d\u5b58\u5728\uff0c\u6211\u5011\u5c31\u5275\u5efa\u4e00\u500b\u65b0\u6a94\u6848\u4e26\u5beb\u5165\u5167\u5bb9\u3002\u9019\u6a23\u53ef\u4ee5\u6709\u6548\u907f\u514d FileExistsError \u7684\u767c\u751f\u3002<\/p>\n

\u8655\u7406 FileExistsError \u932f\u8aa4<\/h2>\n

\u5982\u679c\u4f60\u78ba\u5be6\u9700\u8981\u5275\u5efa\u4e00\u500b\u6a94\u6848\uff0c\u4e26\u4e14\u4e0d\u78ba\u5b9a\u8a72\u6a94\u6848\u662f\u5426\u5df2\u7d93\u5b58\u5728\uff0c\u5247\u53ef\u4ee5\u4f7f\u7528 `try\/except` \u8a9e\u53e5\u4f86\u6355\u7372 FileExistsError\u3002\u4ee5\u4e0b\u662f\u793a\u7bc4\u4ee3\u78bc\uff1a<\/p>\n

“`python
\nimport os<\/p>\n

file_path = ‘myfile.txt’<\/p>\n

try:
\n with open(file_path, ‘x’) as f: # \u4f7f\u7528 ‘x’ \u6a21\u5f0f\u4f86\u5275\u5efa\u6a94\u6848
\n f.write(‘\u9019\u662f\u65b0\u5275\u5efa\u7684\u6a94\u6848\u5167\u5bb9\u3002’)
\nexcept FileExistsError:
\n print(‘\u6a94\u6848\u5df2\u7d93\u5b58\u5728\uff01\u7121\u6cd5\u5275\u5efa\u6a94\u6848\u3002’)
\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u4f7f\u7528\u4e86 `’x’` \u6a21\u5f0f\u4f86\u5617\u8a66\u5275\u5efa\u6a94\u6848\u3002\u5982\u679c\u6a94\u6848\u5df2\u7d93\u5b58\u5728\uff0c\u5247\u6703\u6355\u7372 FileExistsError \u4e26\u986f\u793a\u76f8\u61c9\u7684\u932f\u8aa4\u4fe1\u606f\u3002<\/p>\n

\u5ef6\u4f38\u61c9\u7528<\/h2>\n

\u9664\u4e86\u57fa\u672c\u7684\u6a94\u6848\u5b58\u5728\u6aa2\u67e5\u548c\u932f\u8aa4\u8655\u7406\uff0c\u9084\u53ef\u4ee5\u8003\u616e\u5176\u4ed6\u7684\u6a94\u6848\u64cd\u4f5c\uff0c\u6bd4\u5982\uff1a<\/p>\n

1. **\u6a94\u6848\u8986\u84cb**\uff1a\u5982\u679c\u4f60\u5e0c\u671b\u5728\u6a94\u6848\u5b58\u5728\u6642\u76f4\u63a5\u8986\u84cb\uff0c\u53ef\u4ee5\u4f7f\u7528 `’w’` \u6a21\u5f0f\uff0c\u4f46\u8981\u5c0f\u5fc3\u9019\u6703\u522a\u9664\u539f\u6709\u5167\u5bb9\u3002<\/p>\n

2. **\u6a94\u6848\u5099\u4efd**\uff1a\u5728\u5275\u5efa\u65b0\u6a94\u6848\u4e4b\u524d\uff0c\u53ef\u4ee5\u5148\u6aa2\u67e5\u6a94\u6848\u662f\u5426\u5b58\u5728\uff0c\u82e5\u5b58\u5728\u5247\u5099\u4efd\u820a\u6a94\u6848\u3002<\/p>\n

3. **\u7570\u5e38\u8655\u7406**\uff1a\u9664\u4e86 FileExistsError\uff0c\u9084\u53ef\u4ee5\u8003\u616e\u5176\u4ed6\u7570\u5e38\u60c5\u6cc1\uff0c\u6bd4\u5982 IO \u932f\u8aa4\u7b49\u3002<\/p>\n

\u9019\u4e9b\u6280\u5de7\u5c07\u4f7f\u4f60\u7684\u7a0b\u5f0f\u78bc\u66f4\u52a0\u5065\u58ef\u4e14\u9069\u61c9\u591a\u8b8a\u7684\u60c5\u6cc1\u3002<\/p>\n

\u7e3d\u7d50<\/h2>\n

\u5728 Python \u4e2d\uff0cFileExistsError \u662f\u4e00\u500b\u5e38\u898b\u7684\u932f\u8aa4\uff0c\u53ef\u4ee5\u4f7f\u7528 `os.path.exists()` \u51fd\u6578\u4f86\u6aa2\u67e5\u6a94\u6848\u662f\u5426\u5b58\u5728\uff0c\u4e26\u4f7f\u7528 `try\/except` \u8a9e\u53e5\u4f86\u6709\u6548\u8655\u7406 FileExistsError \u932f\u8aa4\u3002\u9019\u4e9b\u6700\u4f73\u5be6\u8e10\u5c07\u5e6b\u52a9\u4f60\u5728\u9032\u884c\u6a94\u6848\u64cd\u4f5c\u6642\u66f4\u52a0\u5f97\u5fc3\u61c9\u624b\u3002<\/p>\n

\u5982\u679c\u4f60\u60f3\u9032\u4e00\u6b65\u4e86\u89e3 Python \u932f\u8aa4\u8655\u7406\u7684\u5176\u4ed6\u65b9\u9762\uff0c\u8acb\u53c3\u8003\u9019\u7bc7 [Python \u932f\u8aa4\u8655\u7406\u6700\u4f73\u5be6\u8e10](https:\/\/vocus.cc\/article\/633e0a7a18f0c40001c0f619)\u3002<\/p>\n

Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n

**Q1: FileExistsError \u548c\u5176\u4ed6\u6a94\u6848\u932f\u8aa4\u6709\u4ec0\u9ebc\u4e0d\u540c\uff1f**
\nA1: FileExistsError \u5c08\u9580\u7528\u65bc\u6a94\u6848\u5df2\u5b58\u5728\u7684\u60c5\u6cc1\uff0c\u800c\u5176\u4ed6\u6a94\u6848\u932f\u8aa4\uff08\u5982 IOError\uff09\u5247\u53ef\u80fd\u6d89\u53ca\u5176\u4ed6\u539f\u56e0\uff0c\u4f8b\u5982\u6a94\u6848\u8def\u5f91\u932f\u8aa4\u6216\u8b80\u53d6\u6b0a\u9650\u4e0d\u8db3\u3002<\/p>\n

**Q2: \u5982\u4f55\u907f\u514d FileExistsError\uff1f**
\nA2: \u4f7f\u7528 `os.path.exists()` \u4f86\u6aa2\u67e5\u6a94\u6848\u662f\u5426\u5b58\u5728\uff0c\u6216\u4f7f\u7528 `’x’` \u6a21\u5f0f\u4f86\u5275\u5efa\u6a94\u6848\uff0c\u9019\u6a23\u53ef\u4ee5\u5728\u6a94\u6848\u5df2\u5b58\u5728\u7684\u60c5\u6cc1\u4e0b\u9632\u6b62\u932f\u8aa4\u767c\u751f\u3002<\/p>\n

**Q3: \u5728 Python \u4e2d\u6a94\u6848\u64cd\u4f5c\u7684\u6700\u4f73\u5be6\u8e10\u662f\u4ec0\u9ebc\uff1f**
\nA3: \u6700\u4f73\u5be6\u8e10\u5305\u62ec\u4f7f\u7528\u4e0a\u4e0b\u6587\u7ba1\u7406\u5668\uff08`with` \u8a9e\u53e5\uff09\u4f86\u78ba\u4fdd\u6a94\u6848\u5728\u64cd\u4f5c\u5f8c\u6b63\u78ba\u95dc\u9589\uff0c\u4ee5\u53ca\u9069\u7576\u7684\u7570\u5e38\u8655\u7406\u4f86\u6355\u7372\u4e26\u8655\u7406\u6f5b\u5728\u932f\u8aa4\u3002<\/p>\n

—<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6458\u8981(Description):FileExistsError\u662fPython\u4e2d\u7684\u4e00\u500b\u4f8b\u5916\uff0c\u7576\u5617\u8a66\u5275\u5efa\u4e00\u500b\u5df2\u5b58\u5728\u7684\u6587\u4ef6\u6642\uff0c\u5b83\u5c07\u5f15\u767c\u6b64\u4f8b\u5916\u3002\u672c\u6587\u5c07\u4ecb\u7d39FileExistsError\u51fd\u6578\u7684\u529f\u80fd\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u8655\u7406\u6587\u4ef6\u5b58\u5728\u6642\u7684\u554f\u984c\u3002<\/p>\n","protected":false},"author":1,"featured_media":2518,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[18],"tags":[15],"class_list":["post-3582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python","tag-python"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/badgameshow.com\/steven\/wp-content\/uploads\/2022\/12\/DALL\u00b7E-2022-12-28-14.25.55-\u62f7\u8c9d2.png","jetpack-related-posts":[],"jetpack_shortlink":"https:\/\/wp.me\/pcFK27-VM","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/comments?post=3582"}],"version-history":[{"count":2,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3582\/revisions"}],"predecessor-version":[{"id":12789,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3582\/revisions\/12789"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media\/2518"}],"wp:attachment":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/media?parent=3582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}