{"id":2678,"date":"2025-05-30T17:46:26","date_gmt":"2025-06-04T09:55:26","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=2678"},"modified":"2025-06-04T17:46:26","modified_gmt":"2025-06-04T09:55:26","slug":"%e4%bd%bf%e7%94%a8pythonlist%e7%9a%84map%e5%87%bd%e6%95%b8%e5%b0%8d%e4%b8%b2%e5%88%97%e4%b8%ad%e7%9a%84%e6%af%8f%e5%80%8b%e5%85%83%e7%b4%a0%e5%9f%b7%e8%a1%8c%e6%8c%87%e5%ae%9a%e7%9a%84%e5%87%bd","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%bd%bf%e7%94%a8pythonlist%e7%9a%84map%e5%87%bd%e6%95%b8%e5%b0%8d%e4%b8%b2%e5%88%97%e4%b8%ad%e7%9a%84%e6%af%8f%e5%80%8b%e5%85%83%e7%b4%a0%e5%9f%b7%e8%a1%8c%e6%8c%87%e5%ae%9a%e7%9a%84%e5%87%bd\/","title":{"rendered":"2025 \u6700\u65b0\u7248 Python \u6559\u5b78\uff1a\u4f7f\u7528 map() \u51fd\u6578\u8655\u7406\u4e32\u5217\u5143\u7d20"},"content":{"rendered":"

<\/p>\n

2025 \u6700\u65b0\u7248 Python \u6559\u5b78\uff1a\u4f7f\u7528 map() \u51fd\u6578\u8655\u7406\u4e32\u5217\u5143\u7d20<\/h1>\n

\u5728 Python \u4e2d\uff0c\u4e32\u5217\uff08List\uff09\u662f\u4e00\u7a2e\u975e\u5e38\u5e38\u7528\u7684\u8cc7\u6599\u7d50\u69cb\uff0c\u53ef\u4ee5\u5132\u5b58\u591a\u500b\u5143\u7d20\u4e26\u63d0\u4f9b\u8a31\u591a\u5f37\u5927\u7684\u64cd\u4f5c\u65b9\u6cd5\u3002\u5176\u4e2d\uff0c`map()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5c0d\u4e32\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u51fd\u6578\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u4e32\u5217\uff0c\u8a72\u4e32\u5217\u5305\u542b\u51fd\u6578\u904b\u7b97\u7684\u7d50\u679c\u3002<\/p>\n

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

`map()` \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n

“`python
\nmap(function, iterable, …)
\n“`<\/p>\n

– **function**\uff1a\u8981\u57f7\u884c\u7684\u51fd\u6578\u3002
\n– **iterable**\uff1a\u8981\u88ab\u64cd\u4f5c\u7684\u4e32\u5217\uff0c\u53ef\u4ee5\u6709\u591a\u500b iterable\uff0c\u4f46 function \u7684\u53c3\u6578\u6578\u91cf\u5fc5\u9808\u548c iterable \u7684\u6578\u91cf\u4e00\u81f4\u3002<\/p>\n

\u8209\u500b\u4f8b\u5b50\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5305\u542b\u6578\u5b57\u7684\u4e32\u5217\uff1a<\/p>\n

“`python
\nnumbers = [1, 2, 3, 4, 5]\n“`<\/p>\n

\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 `map()` \u51fd\u6578\u5c0d\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u51fd\u6578\uff0c\u4f8b\u5982\u5c0d\u6bcf\u500b\u5143\u7d20\u6c42\u5e73\u65b9\uff1a<\/p>\n

“`python
\ndef square(x):
\n return x * x<\/p>\n

squares = list(map(square, numbers))<\/p>\n

print(squares)
\n“`<\/p>\n

\u57f7\u884c\u7d50\u679c\u5982\u4e0b\uff1a<\/p>\n

“`python
\n[1, 4, 9, 16, 25]\n“`<\/p>\n

\u53ef\u4ee5\u770b\u5230\uff0c`map()` \u51fd\u6578\u5c0d\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u4e86 `square` \u51fd\u6578\uff0c\u4e26\u8fd4\u56de\u4e86\u4e00\u500b\u65b0\u7684\u4e32\u5217\uff0c\u5176\u4e2d\u5305\u542b\u4e86\u51fd\u6578\u7684\u904b\u7b97\u7d50\u679c\u3002<\/p>\n

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

\u5728\u4f7f\u7528 `map()` \u51fd\u6578\u6642\uff0c\u5e38\u898b\u7684\u932f\u8aa4\u5305\u62ec\uff1a<\/p>\n

1. **\u51fd\u6578\u53c3\u6578\u4e0d\u5339\u914d**\uff1a\u78ba\u4fdd `function` \u7684\u53c3\u6578\u6578\u91cf\u8207 `iterable` \u4e2d\u7684\u5143\u7d20\u6578\u91cf\u4e00\u81f4\u3002
\n2. **\u50b3\u905e\u975e\u53ef\u8fed\u4ee3\u5c0d\u8c61**\uff1a\u78ba\u4fdd `iterable` \u53c3\u6578\u70ba\u53ef\u8fed\u4ee3\u5c0d\u8c61\uff0c\u5982\u4e32\u5217\u3001\u5143\u7d44\u7b49\u3002<\/p>\n

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

\u9664\u4e86\u57fa\u672c\u7684\u6578\u5b57\u64cd\u4f5c\uff0c`map()` \u51fd\u6578\u9084\u53ef\u4ee5\u7528\u65bc\u66f4\u8907\u96dc\u7684\u6578\u64da\u8655\u7406\uff0c\u4f8b\u5982\u5c07\u5b57\u7b26\u4e32\u8f49\u63db\u70ba\u6574\u6578\uff1a<\/p>\n

“`python
\nstring_numbers = [‘1’, ‘2’, ‘3’, ‘4’, ‘5’]\nint_numbers = list(map(int, string_numbers))<\/p>\n

print(int_numbers)
\n“`<\/p>\n

\u57f7\u884c\u7d50\u679c\uff1a<\/p>\n

“`python
\n[1, 2, 3, 4, 5]\n“`<\/p>\n

\u9019\u5c55\u793a\u4e86 `map()` \u51fd\u6578\u7684\u9748\u6d3b\u6027\uff0c\u4ee5\u53ca\u5982\u4f55\u61c9\u7528\u5728\u4e0d\u540c\u7684\u8cc7\u6599\u985e\u578b\u4e0a\u3002<\/p>\n

\u7d50\u8ad6<\/h2>\n

`map()` \u51fd\u6578\u662f Python \u4e2d\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5b83\u80fd\u5927\u5e45\u7c21\u5316\u7a0b\u5f0f\u78bc\uff0c\u6e1b\u5c11\u91cd\u8907\u4ee3\u78bc\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u7684\u53ef\u8b80\u6027\u8207\u53ef\u7dad\u8b77\u6027\u3002\u5c0d\u65bc\u8655\u7406\u4e32\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\uff0c`map()` \u51fd\u6578\u63d0\u4f9b\u4e86\u4e00\u500b\u512a\u96c5\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n

\u5982\u9700\u9032\u4e00\u6b65\u5b78\u7fd2 Python \u7684\u5176\u4ed6\u529f\u80fd\u8207\u6280\u5de7\uff0c\u60a8\u53ef\u4ee5\u53c3\u8003 [\u9019\u7bc7\u6559\u5b78](https:\/\/vocus.cc) \u4f86\u64f4\u5c55\u60a8\u7684\u77e5\u8b58\u3002<\/p>\n

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

**Q1: \u4f7f\u7528 `map()` \u51fd\u6578\u6709\u4ec0\u9ebc\u512a\u52e2\uff1f**
\nA1: `map()` \u51fd\u6578\u53ef\u4ee5\u6e1b\u5c11\u4ee3\u78bc\u91cf\uff0c\u63d0\u5347\u7a0b\u5f0f\u7684\u53ef\u8b80\u6027\uff0c\u4e26\u4e14\u80fd\u5920\u540c\u6642\u5c0d\u591a\u500b\u4e32\u5217\u9032\u884c\u64cd\u4f5c\u3002<\/p>\n

**Q2: \u5982\u4f55\u4f7f\u7528 lambda \u51fd\u6578\u8207 `map()` \u7d50\u5408\uff1f**
\nA2: \u60a8\u53ef\u4ee5\u4f7f\u7528 lambda \u51fd\u6578\u4f86\u5373\u6642\u5b9a\u7fa9\u51fd\u6578\uff0c\u4f8b\u5982\uff1a`squares = list(map(lambda x: x * x, numbers))`\u3002<\/p>\n

**Q3: `map()` \u51fd\u6578\u6703\u6539\u8b8a\u539f\u59cb\u4e32\u5217\u55ce\uff1f**
\nA3: \u4e0d\u6703\uff0c`map()` \u51fd\u6578\u6703\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u4e32\u5217\uff0c\u800c\u4e0d\u6703\u6539\u8b8a\u539f\u59cb\u7684\u4e32\u5217\u3002<\/p>\n

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

\u6587\u7ae0\u6458\u8981\uff1aPythonList\u7684map()\u51fd\u6578\u53ef\u4ee5\u5c0d\u4e32\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u51fd\u6578\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u63d0\u9ad8\u7a0b\u5f0f\u7684\u6548\u7387\uff0c\u4e26\u6e1b\u5c11\u7a0b\u5f0f\u78bc\u7684\u91cd\u8907\u6027\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-2678","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-Hc","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2678","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=2678"}],"version-history":[{"count":3,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2678\/revisions"}],"predecessor-version":[{"id":13048,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2678\/revisions\/13048"}],"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=2678"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2678"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2678"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}