{"id":2798,"date":"2025-06-03T17:39:52","date_gmt":"2025-06-04T09:43:51","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=2798"},"modified":"2025-06-04T17:39:52","modified_gmt":"2025-06-04T09:43:51","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%adlen%e5%87%bd%e6%95%b8%e7%9a%84%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e4%b8%adlen%e5%87%bd%e6%95%b8%e7%9a%84%e7%94%a8%e6%b3%95\/","title":{"rendered":"\u5168\u9762\u89e3\u6790 Python \u4e2d\u7684 len() \u51fd\u6578\uff1a2025 \u6700\u65b0\u7528\u6cd5\u8207\u5be6\u4f5c\u7bc4\u4f8b"},"content":{"rendered":"

<\/p>\n

Python \u7684 `len()` \u51fd\u6578\u662f\u4e00\u500b\u4e0d\u53ef\u6216\u7f3a\u7684\u5167\u5efa\u51fd\u6578\uff0c\u5b83\u80fd\u5920\u5feb\u901f\u8fd4\u56de\u5404\u7a2e\u5e8f\u5217\uff08\u5982\u5b57\u7b26\u4e32\u3001\u5217\u8868\u3001\u5143\u7d44\uff09\u7684\u9577\u5ea6\u3002\u7121\u8ad6\u662f\u6578\u64da\u8655\u7406\u9084\u662f\u65e5\u5e38\u7de8\u7a0b\uff0c`len()` \u51fd\u6578\u90fd\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u8fc5\u901f\u7372\u53d6\u5143\u7d20\u6578\u91cf\uff0c\u9032\u800c\u9032\u884c\u76f8\u61c9\u64cd\u4f5c\u3002<\/p>\n

len() \u51fd\u6578\u7684\u4f7f\u7528<\/h2>\n

`len()` \u51fd\u6578\u7684\u8a9e\u6cd5\u975e\u5e38\u7c21\u55ae\uff0c\u60a8\u53ea\u9700\u5c07\u5e8f\u5217\u4f5c\u70ba\u53c3\u6578\u50b3\u905e\u7d66\u5b83\uff0c\u8a72\u51fd\u6578\u5c07\u8fd4\u56de\u5e8f\u5217\u7684\u9577\u5ea6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\uff0c\u53ef\u4ee5\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7406\u89e3\u5982\u4f55\u4f7f\u7528 `len()` \u51fd\u6578\u3002<\/p>\n

\u7372\u53d6\u5b57\u7b26\u4e32\u9577\u5ea6<\/h3>\n

\u4f7f\u7528 `len()` \u51fd\u6578\u4f86\u7372\u53d6\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u5341\u5206\u7c21\u4fbf\u3002\u8acb\u53c3\u8003\u4ee5\u4e0b\u4ee3\u78bc\uff1a<\/p>\n

“`python
\nmy_string = “Hello World!”
\nlength = len(my_string)
\nprint(length)
\n“`<\/p>\n

**\u8f38\u51fa\uff1a**
\n“`
\n12
\n“`
\n\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`len()` \u8fd4\u56de\u4e86\u5b57\u7b26\u4e32 “Hello World!” \u7684\u9577\u5ea6\uff0c\u5373 12\u3002<\/p>\n

\u7372\u53d6\u5217\u8868\u9577\u5ea6<\/h3>\n

\u540c\u6a23\u5730\uff0c\u6211\u5011\u4e5f\u53ef\u4ee5\u4f7f\u7528 `len()` \u51fd\u6578\u4f86\u7372\u53d6\u5217\u8868\u7684\u9577\u5ea6\uff1a<\/p>\n

“`python
\nmy_list = [1, 2, 3, 4, 5]\nlength = len(my_list)
\nprint(length)
\n“`<\/p>\n

**\u8f38\u51fa\uff1a**
\n“`
\n5
\n“`
\n\u9019\u88e1\uff0c`len()` \u8fd4\u56de\u4e86\u5217\u8868\u4e2d\u5143\u7d20\u7684\u6578\u91cf\uff0c\u5373 5\u3002<\/p>\n

\u7372\u53d6\u5143\u7d44\u9577\u5ea6<\/h3>\n

\u9664\u4e86\u5b57\u7b26\u4e32\u548c\u5217\u8868\u5916\uff0c`len()` \u51fd\u6578\u4e5f\u53ef\u4ee5\u7528\u65bc\u5143\u7d44\uff1a<\/p>\n

“`python
\nmy_tuple = (1, 2, 3, 4, 5)
\nlength = len(my_tuple)
\nprint(length)
\n“`<\/p>\n

**\u8f38\u51fa\uff1a**
\n“`
\n5
\n“`
\n\u5728\u9019\u500b\u793a\u4f8b\u4e2d\uff0c`len()` \u8fd4\u56de\u4e86\u5143\u7d44\u4e2d\u5143\u7d20\u7684\u6578\u91cf\uff0c\u540c\u6a23\u662f 5\u3002<\/p>\n

\u932f\u8aa4\u6392\u9664<\/h2>\n

\u5728\u4f7f\u7528 `len()` \u51fd\u6578\u6642\uff0c\u60a8\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u932f\u8aa4\uff0c\u4f8b\u5982\uff1a
\n– **TypeError**\uff1a\u5982\u679c\u60a8\u5617\u8a66\u5c0d\u4e00\u500b\u4e0d\u652f\u6301\u9577\u5ea6\u8a08\u7b97\u7684\u5c0d\u8c61\uff08\u5982\u6578\u5b57\uff09\u4f7f\u7528 `len()`\uff0c\u5c07\u5f15\u767c\u8a72\u932f\u8aa4\u3002\u8acb\u78ba\u4fdd\u50b3\u905e\u7684\u53c3\u6578\u662f\u6709\u6548\u7684\u5e8f\u5217\u985e\u578b\u3002<\/p>\n

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

`len()` \u51fd\u6578\u5728\u6578\u64da\u8655\u7406\u548c\u7de8\u7a0b\u4e2d\u6709\u773e\u591a\u904b\u7528\u5834\u666f\uff0c\u4f8b\u5982\uff1a
\n– \u5728\u8fed\u4ee3\u904e\u7a0b\u4e2d\u6aa2\u67e5\u5e8f\u5217\u7684\u9577\u5ea6\uff0c\u4ee5\u907f\u514d\u8d85\u51fa\u7bc4\u570d\u7684\u932f\u8aa4\u3002
\n– \u5728\u6578\u64da\u5206\u6790\u4e2d\uff0c\u5feb\u901f\u7372\u53d6\u6578\u64da\u96c6\u7684\u5927\u5c0f\uff0c\u70ba\u5f8c\u7e8c\u64cd\u4f5c\u63d0\u4f9b\u4f9d\u64da\u3002<\/p>\n

\u60f3\u4e86\u89e3\u66f4\u591a Python \u7684\u57fa\u790e\u77e5\u8b58\u548c\u9032\u968e\u6280\u5de7\uff0c\u53ef\u4ee5\u53c3\u8003 [\u9019\u7bc7\u6559\u5b78\u6587\u7ae0](https:\/\/vocus.cc\/article\/6115bfa6fd89780001f3e9d6) \u4ee5\u64f4\u5c55\u60a8\u7684\u77e5\u8b58\u3002<\/p>\n

\u7d50\u8ad6<\/h2>\n

\u7e3d\u800c\u8a00\u4e4b\uff0cPython \u7684 `len()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u4fbf\u5229\u7684\u5de5\u5177\uff0c\u80fd\u5920\u8f15\u9b06\u7372\u53d6\u5e8f\u5217\u7684\u9577\u5ea6\u3002\u7121\u8ad6\u662f\u8655\u7406\u5b57\u7b26\u4e32\u3001\u5217\u8868\u9084\u662f\u5143\u7d44\uff0c\u638c\u63e1 `len()` \u7684\u7528\u6cd5\u90fd\u662f Python \u7de8\u7a0b\u7684\u91cd\u8981\u57fa\u790e\u3002<\/p>\n

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

**Q1: `len()` \u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u54ea\u4e9b\u6578\u64da\u985e\u578b\uff1f**
\nA1: `len()` \u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u5b57\u7b26\u4e32\u3001\u5217\u8868\u3001\u5143\u7d44\u3001\u5b57\u5178\u7b49\u5e8f\u5217\u985e\u578b\u3002<\/p>\n

**Q2: \u4f7f\u7528 `len()` \u51fd\u6578\u6642\u6703\u9047\u5230\u54ea\u4e9b\u932f\u8aa4\uff1f**
\nA2: \u5e38\u898b\u7684\u932f\u8aa4\u5305\u62ec TypeError\uff0c\u9019\u901a\u5e38\u767c\u751f\u5728\u5c0d\u4e0d\u652f\u6301\u9577\u5ea6\u8a08\u7b97\u7684\u5c0d\u8c61\u4f7f\u7528 `len()` \u6642\u3002<\/p>\n

**Q3: `len()` \u51fd\u6578\u7684\u8fd4\u56de\u503c\u662f\u4ec0\u9ebc\u985e\u578b\uff1f**
\nA3: `len()` \u51fd\u6578\u8fd4\u56de\u503c\u70ba\u6574\u578b\uff0c\u8868\u793a\u5e8f\u5217\u4e2d\u5143\u7d20\u7684\u6578\u91cf\u3002<\/p>\n

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

Python\u4e2dlen()\u51fd\u6578\u53ef\u4ee5\u7528\u4f86\u8fd4\u56de\u5e8f\u5217\uff08\u5982\u5b57\u7b26\u4e32\u3001\u5217\u8868\u3001\u5143\u7ec4\uff09\u7684\u9577\u5ea6\uff0c\u672c\u6587\u5c07\u4ecb\u7d39len()\u51fd\u6578\u7684\u7528\u6cd5\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u6e2c\u91cf\u5e8f\u5217\u7684\u9577\u5ea6\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-2798","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-J8","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2798","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=2798"}],"version-history":[{"count":2,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2798\/revisions"}],"predecessor-version":[{"id":18570,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2798\/revisions\/18570"}],"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=2798"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2798"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2798"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}