{"id":2680,"date":"2025-05-31T16:57:10","date_gmt":"2025-06-04T09:55:10","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=2680"},"modified":"2025-06-04T16:57:10","modified_gmt":"2025-06-04T09:55:10","slug":"%e4%bd%bf%e7%94%a8python%e7%9a%84filter%e5%87%bd%e6%95%b8%e9%81%8e%e6%bf%be%e4%b8%b2%e5%88%97%e4%b8%ad%e7%9a%84%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%bd%bf%e7%94%a8python%e7%9a%84filter%e5%87%bd%e6%95%b8%e9%81%8e%e6%bf%be%e4%b8%b2%e5%88%97%e4%b8%ad%e7%9a%84%e5%85%83%e7%b4%a0\/","title":{"rendered":"\u4f7f\u7528 Python \u7684 filter() \u51fd\u6578\u9ad8\u6548\u904e\u6ffe\u4e32\u5217\u5143\u7d20\uff1a2025 \u6700\u65b0\u6559\u5b78"},"content":{"rendered":"

<\/p>\n

\u5728 Python \u7a0b\u5f0f\u8a2d\u8a08\u4e2d\uff0c\u4e32\u5217(List)\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u8cc7\u6599\u7d50\u69cb\uff0c\u800c `filter()` \u51fd\u6578\u5247\u662f\u904e\u6ffe\u4e32\u5217\u4e2d\u5143\u7d20\u7684\u5f37\u5927\u5de5\u5177\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u4ecb\u7d39\u5982\u4f55\u5728 2025 \u5e74\u6700\u65b0\u7684 Python \u74b0\u5883\u4e2d\u4f7f\u7528 `filter()` \u51fd\u6578\uff0c\u4e26\u63d0\u4f9b\u5b8c\u6574\u7684\u5be6\u4f5c\u7bc4\u4f8b\u8207\u6700\u4f73\u5be6\u8e10\u3002<\/p>\n

\u4ec0\u9ebc\u662f Python \u4e32\u5217(List)<\/h2>\n

Python \u4e32\u5217(List)\u662f\u4e00\u7a2e\u6709\u5e8f\u7684\u8cc7\u6599\u7d50\u69cb\uff0c\u53ef\u4ee5\u5132\u5b58\u4efb\u610f\u985e\u578b\u7684\u8cc7\u6599\uff0c\u4f8b\u5982\u6578\u5b57\u3001\u5b57\u4e32\u3001\u7269\u4ef6\u7b49\u7b49\u3002\u5b83\u53ef\u4ee5\u88ab\u8996\u70ba\u4e00\u500b\u6e05\u55ae\uff0c\u8b93\u6211\u5011\u80fd\u5920\u8f15\u9b06\u5730\u5c07\u8cc7\u6599\u5132\u5b58\u548c\u53d6\u51fa\u3002<\/p>\n

\u4ec0\u9ebc\u662f filter() \u51fd\u6578<\/h2>\n

`filter()` \u51fd\u6578\u662f Python \u4e2d\u7684\u4e00\u500b\u5167\u5efa\u51fd\u6578\uff0c\u7528\u4f86\u904e\u6ffe\u4e32\u5217\u4e2d\u7684\u5143\u7d20\u3002\u5b83\u63a5\u53d7\u4e00\u500b\u51fd\u6578\u548c\u4e00\u500b\u53ef\u8fed\u4ee3\u5c0d\u8c61\uff08\u901a\u5e38\u662f\u4e32\u5217\uff09\u4f5c\u70ba\u53c3\u6578\uff0c\u4e26\u5c0d\u4e32\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u8a72\u51fd\u6578\u3002\u5982\u679c\u51fd\u6578\u7684\u8fd4\u56de\u503c\u70ba True\uff0c\u5247\u8a72\u5143\u7d20\u5c07\u88ab\u5305\u542b\u5728\u65b0\u7684\u4e32\u5217\u4e2d\uff0c\u6700\u7d42\u8fd4\u56de\u9019\u500b\u65b0\u4e32\u5217\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528 filter() \u51fd\u6578<\/h2>\n

\u4f7f\u7528 `filter()` \u51fd\u6578\u975e\u5e38\u7c21\u55ae\uff0c\u4ee5\u4e0b\u662f\u4e00\u500b\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528 `filter()` \u51fd\u6578\u4f86\u7be9\u9078\u51fa\u4e32\u5217\u4e2d\u7684\u5076\u6578\uff1a<\/p>\n

“`python
\ndef is_even(x):
\n “””\u6aa2\u67e5\u6578\u5b57\u662f\u5426\u70ba\u5076\u6578”””
\n return x % 2 == 0<\/p>\n

numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]\n

# \u4f7f\u7528 filter() \u51fd\u6578\u904e\u6ffe\u5076\u6578
\neven_numbers = list(filter(is_even, numbers))<\/p>\n

print(even_numbers) # \u8f38\u51fa: [2, 4, 6, 8, 10]\n“`<\/p>\n

\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c`filter()` \u51fd\u6578\u5c0d\u4e32\u5217 `numbers` \u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c `is_even()` \u51fd\u6578\uff0c\u4e26\u8fd4\u56de\u6240\u6709\u8fd4\u56de True \u7684\u5143\u7d20\uff0c\u6700\u7d42\u7522\u751f\u4e00\u500b\u65b0\u7684\u4e32\u5217 `even_numbers`\u3002<\/p>\n

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

1. **\u78ba\u4fdd\u51fd\u6578\u8fd4\u56de\u5e03\u6797\u503c**\uff1a`filter()` \u51fd\u6578\u8981\u6c42\u7684\u904e\u6ffe\u51fd\u6578\u5fc5\u9808\u8fd4\u56de True \u6216 False\uff0c\u78ba\u4fdd\u4f60\u7684\u51fd\u6578\u7b26\u5408\u9019\u500b\u8981\u6c42\u3002
\n2. **\u8655\u7406\u975e\u53ef\u8fed\u4ee3\u5c0d\u8c61**\uff1a\u50b3\u5165 `filter()` \u7684\u7b2c\u4e8c\u500b\u53c3\u6578\u5fc5\u9808\u662f\u53ef\u8fed\u4ee3\u5c0d\u8c61\uff08\u5982\u4e32\u5217\u3001\u5143\u7d44\u7b49\uff09\uff0c\u5426\u5247\u6703\u5f15\u767c\u932f\u8aa4\u3002<\/p>\n

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

`filter()` \u51fd\u6578\u4e0d\u50c5\u53ef\u4ee5\u7528\u65bc\u7be9\u9078\u6578\u5b57\uff0c\u4e5f\u53ef\u7528\u65bc\u5176\u4ed6\u8cc7\u6599\u985e\u578b\u3002\u4f8b\u5982\uff0c\u904e\u6ffe\u51fa\u5b57\u4e32\u4e2d\u4ee5\u7279\u5b9a\u5b57\u6bcd\u958b\u982d\u7684\u9805\u76ee\uff1a<\/p>\n

“`python
\nwords = [“apple”, “banana”, “cherry”, “date”]\n

# \u904e\u6ffe\u4ee5\u5b57\u6bcd ‘b’ \u958b\u982d\u7684\u5b57\u4e32
\nb_words = list(filter(lambda word: word.startswith(‘b’), words))<\/p>\n

print(b_words) # \u8f38\u51fa: [‘banana’]\n“`<\/p>\n

\u7d50\u8ad6<\/h2>\n

\u900f\u904e\u4f7f\u7528 Python \u7684 `filter()` \u51fd\u6578\uff0c\u6211\u5011\u53ef\u4ee5\u9ad8\u6548\u5730\u904e\u6ffe\u4e32\u5217\u4e2d\u7684\u5143\u7d20\u3002\u9019\u4e0d\u50c5\u4f7f\u8cc7\u6599\u7684\u8655\u7406\u8b8a\u5f97\u7c21\u55ae\uff0c\u4e5f\u8b93\u7a0b\u5f0f\u78bc\u66f4\u52a0\u6e05\u6670\u6613\u61c2\u3002\u82e5\u60a8\u60f3\u9032\u4e00\u6b65\u5b78\u7fd2 Python \u7684\u5176\u4ed6\u529f\u80fd\uff0c\u5efa\u8b70\u53c3\u8003\u9019\u7bc7 [Python \u6559\u5b78\u8cc7\u6e90](https:\/\/vocus.cc) \u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n

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

**Q1: filter() \u51fd\u6578\u7684\u8fd4\u56de\u503c\u662f\u4ec0\u9ebc\uff1f**
\nA: `filter()` \u51fd\u6578\u8fd4\u56de\u4e00\u500b\u8fed\u4ee3\u5668\uff0c\u9700\u8981\u5c07\u5176\u8f49\u63db\u70ba\u4e32\u5217\u6216\u5176\u4ed6\u6578\u64da\u7d50\u69cb\u4f86\u67e5\u770b\u7d50\u679c\u3002<\/p>\n

**Q2: \u53ef\u4ee5\u4f7f\u7528 lambda \u51fd\u6578\u8207 filter() \u4e00\u8d77\u55ce\uff1f**
\nA: \u662f\u7684\uff0c`filter()` \u51fd\u6578\u975e\u5e38\u9069\u5408\u8207 lambda \u51fd\u6578\u4e00\u8d77\u4f7f\u7528\uff0c\u9019\u6a23\u53ef\u4ee5\u8b93\u7a0b\u5f0f\u78bc\u66f4\u52a0\u7c21\u6f54\u3002<\/p>\n

**Q3: \u6709\u54ea\u4e9b\u60c5\u6cc1\u4e0b\u4e0d\u61c9\u4f7f\u7528 filter() \u51fd\u6578\uff1f**
\nA: \u7576\u60a8\u9700\u8981\u66f4\u8907\u96dc\u7684\u904e\u6ffe\u908f\u8f2f\u6642\uff0c\u5efa\u8b70\u4f7f\u7528\u5217\u8868\u63a8\u5c0e\u5f0f\u6216\u5176\u4ed6\u66f4\u9748\u6d3b\u7684\u8cc7\u6599\u8655\u7406\u65b9\u6cd5\u3002<\/p>\n

—<\/p>\n

\u9019\u7bc7\u6587\u7ae0\u7684\u5167\u5bb9\u5df2\u6839\u64da\u60a8\u7684\u8981\u6c42\u9032\u884c\u4e86\u512a\u5316\uff0c\u4e26\u9075\u5faa\u4e86 SEO \u6700\u4f73\u5be6\u8e10\u3002\u5e0c\u671b\u80fd\u5c0d\u60a8\u7684\u7db2\u7ad9\u6d41\u91cf\u548c\u7528\u6236\u9ad4\u9a57\u6709\u6240\u5e6b\u52a9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"

Python\u7684filter()\u51fd\u6578\u53ef\u4ee5\u8f15\u9b06\u5730\u904e\u6ffe\u4e32\u5217\u4e2d\u7684\u5143\u7d20\uff0c\u8b93\u4f60\u53ef\u4ee5\u5feb\u901f\u5730\u7be9\u9078\u51fa\u4f60\u60f3\u8981\u7684\u5143\u7d20\uff0c\u8b93\u4f60\u7684\u7a0b\u5f0f\u66f4\u52a0\u9748\u6d3b\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-2680","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-He","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2680","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=2680"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2680\/revisions"}],"predecessor-version":[{"id":2681,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2680\/revisions\/2681"}],"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=2680"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2680"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2680"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}