<\/p>\n
Python \u7684 `filter()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5feb\u901f\u904e\u6ffe\u51fa\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u8cc7\u6599\u3002\u7121\u9700\u64b0\u5beb\u8ff4\u5708\uff0c`filter()` \u51fd\u6578\u80fd\u5920\u5f9e\u4e00\u500b\u53ef\u8fed\u4ee3\u7684\u8cc7\u6599\u5e8f\u5217\u4e2d\u7be9\u9078\u51fa\u6240\u9700\u7684\u5143\u7d20\uff0c\u9019\u4f7f\u5f97\u7a0b\u5f0f\u78bc\u66f4\u52a0\u7c21\u6f54\u548c\u9ad8\u6548\u3002<\/p>\n
### filter() \u51fd\u6578\u8a9e\u6cd5<\/p>\n
`filter()` \u51fd\u6578\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
“`python
\nfilter(function, iterable)
\n“`<\/p>\n
– **function**\uff1a\u4e00\u500b\u51fd\u5f0f\uff0c\u63a5\u53d7\u4e00\u500b\u53c3\u6578\u4e26\u56de\u50b3\u5e03\u6797\u503c\uff08True \u6216 False\uff09\u3002
\n– **iterable**\uff1a\u4e00\u500b\u53ef\u8fed\u4ee3\u7684\u8cc7\u6599\u5e8f\u5217\uff0c\u4f8b\u5982 list\u3001tuple \u6216 dict\u3002<\/p>\n
`filter()` \u51fd\u6578\u6703\u5c07 `iterable` \u4e2d\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u50b3\u5165 `function`\uff0c\u5982\u679c `function` \u56de\u50b3 True\uff0c\u5247\u8a72\u5143\u7d20\u6703\u88ab\u4fdd\u7559\uff1b\u5982\u679c\u56de\u50b3 False\uff0c\u5247\u8a72\u5143\u7d20\u6703\u88ab\u904e\u6ffe\u6389\u3002\u6700\u7d42\uff0c`filter()` \u51fd\u6578\u6703\u8fd4\u56de\u4e00\u500b\u7531\u7b26\u5408\u689d\u4ef6\u7684\u5143\u7d20\u7d44\u6210\u7684\u8cc7\u6599\u5e8f\u5217\u3002<\/p>\n
### \u4f7f\u7528\u7bc4\u4f8b<\/p>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u6578\u5b57\u5217\u8868\uff0c\u4e26\u5e0c\u671b\u7be9\u9078\u51fa\u5176\u4e2d\u5927\u65bc 10 \u7684\u6578\u5b57\uff0c\u53ef\u4ee5\u9019\u6a23\u4f7f\u7528 `filter()` \u51fd\u6578\uff1a<\/p>\n
“`python
\nnumbers = [2, 5, 8, 10, 15, 20]\n
def is_greater_than_10(num):
\n return num > 10<\/p>\n
greater_than_10 = filter(is_greater_than_10, numbers)<\/p>\n
print(list(greater_than_10))
\n“`<\/p>\n
\u57f7\u884c\u7d50\u679c\uff1a<\/p>\n
“`
\n[15, 20]\n“`<\/p>\n
\u5982\u4e0a\u7bc4\u4f8b\uff0c`filter()` \u51fd\u6578\u6210\u529f\u5c07 `numbers` \u4e2d\u5927\u65bc 10 \u7684\u6578\u5b57\u7be9\u9078\u51fa\u4f86\uff0c\u4e26\u56de\u50b3\u4e00\u500b\u7531\u7b26\u5408\u689d\u4ef6\u7684\u5143\u7d20\u7d44\u6210\u7684\u8cc7\u6599\u5e8f\u5217\u3002<\/p>\n
### \u932f\u8aa4\u6392\u9664<\/p>\n
\u5728\u4f7f\u7528 `filter()` \u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4ee5\u4e0b\u5e38\u898b\u932f\u8aa4\uff1a<\/p>\n
1. **TypeError**\uff1a\u5982\u679c\u50b3\u5165\u7684 `function` \u4e0d\u662f\u4e00\u500b\u53ef\u547c\u53eb\u7684\u51fd\u5f0f\uff0c\u5247\u6703\u62cb\u51fa\u6b64\u932f\u8aa4\u3002\u78ba\u4fdd `function` \u5df2\u6b63\u78ba\u5b9a\u7fa9\u3002
\n2. **Empty Filter**\uff1a\u5982\u679c\u6240\u6709\u5143\u7d20\u90fd\u4e0d\u7b26\u5408\u689d\u4ef6\uff0c`filter()` \u6703\u8fd4\u56de\u4e00\u500b\u7a7a\u7684\u8fed\u4ee3\u5668\u3002\u4f7f\u7528 `list()` \u8f49\u63db\u4f86\u6aa2\u67e5\u7d50\u679c\u3002<\/p>\n
### \u5ef6\u4f38\u61c9\u7528<\/p>\n
`filter()` \u51fd\u6578\u53ef\u4ee5\u8207 lambda \u51fd\u5f0f\u642d\u914d\u4f7f\u7528\uff0c\u4f7f\u7be9\u9078\u904e\u7a0b\u66f4\u52a0\u7c21\u6f54\uff1a<\/p>\n
“`python
\nnumbers = [2, 5, 8, 10, 15, 20]\ngreater_than_10 = filter(lambda num: num > 10, numbers)
\nprint(list(greater_than_10))
\n“`<\/p>\n
\u9019\u6a23\uff0c\u6211\u5011\u4e0d\u9700\u8981\u984d\u5916\u5b9a\u7fa9\u4e00\u500b\u51fd\u5f0f\u4f86\u9032\u884c\u904e\u6ffe\uff0c\u9069\u5408\u7c21\u55ae\u7684\u904e\u6ffe\u689d\u4ef6\u3002<\/p>\n
### \u7d50\u8ad6<\/p>\n
Python \u7684 `filter()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5feb\u901f\u5730\u5f9e\u8cc7\u6599\u5e8f\u5217\u4e2d\u7be9\u9078\u51fa\u7b26\u5408\u689d\u4ef6\u7684\u5143\u7d20\u3002\u900f\u904e `filter()` \u51fd\u6578\uff0c\u4f60\u53ef\u4ee5\u7c21\u5316\u7a0b\u5f0f\u78bc\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u7684\u53ef\u8b80\u6027\u8207\u6548\u7387\u3002<\/p>\n
\u5982\u9700\u9032\u4e00\u6b65\u5b78\u7fd2 Python \u7684\u5176\u4ed6\u529f\u80fd\uff0c\u53ef\u4ee5\u53c3\u8003\u9019\u7bc7 [Python \u7a0b\u5f0f\u8a9e\u8a00\u5b8c\u6574\u6559\u5b78](https:\/\/vocus.cc) \u4f86\u52a0\u5f37\u4f60\u7684\u7a0b\u5f0f\u8a2d\u8a08\u80fd\u529b\u3002<\/p>\n
### Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n
**Q1: filter() \u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u54ea\u4e9b\u8cc7\u6599\u985e\u578b\uff1f**
\nA1: `filter()` \u51fd\u6578\u53ef\u4ee5\u7528\u65bc\u4efb\u4f55\u53ef\u8fed\u4ee3\u7684\u8cc7\u6599\u985e\u578b\uff0c\u5305\u62ec list\u3001tuple\u3001set\u3001\u5b57\u5178\u7b49\u3002<\/p>\n
**Q2: \u53ef\u4ee5\u4f7f\u7528\u533f\u540d\u51fd\u5f0f\uff08lambda\uff09\u4f86\u66ff\u4ee3\u81ea\u5b9a\u7fa9\u51fd\u5f0f\u55ce\uff1f**
\nA2: \u662f\u7684\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 lambda \u51fd\u5f0f\u4f86\u9032\u884c\u7c21\u55ae\u7684\u689d\u4ef6\u904e\u6ffe\uff0c\u9019\u6a23\u53ef\u4ee5\u4f7f\u4ee3\u78bc\u66f4\u52a0\u7c21\u6f54\u3002<\/p>\n
**Q3: filter() \u8fd4\u56de\u7684\u662f\u4ec0\u9ebc\u985e\u578b\u7684\u8cc7\u6599\uff1f**
\nA3: `filter()` \u51fd\u6578\u8fd4\u56de\u7684\u662f\u4e00\u500b\u8fed\u4ee3\u5668\uff0c\u82e5\u8981\u5c07\u5176\u8f49\u63db\u70ba\u5217\u8868\uff0c\u9700\u4f7f\u7528 `list()` \u51fd\u5f0f\u5305\u88dd\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3Python\u4e2d\u7684Filter()\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u5e6b\u52a9\u4f60\u5feb\u901f\u7be9\u9078\u51fa\u4f60\u60f3\u8981\u7684\u8cc7\u6599\uff0c\u8b93\u4f60\u7684\u7a0b\u5f0f\u66f4\u52a0\u9748\u6d3b\uff0c\u66f4\u5bb9\u6613\u7dad\u8b77\u3002\u672c\u6587\u5c07\u4ecb\u7d39Filter()\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5b83\u7684\u512a\u9ede\u548c\u7f3a\u9ede\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-2996","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-Mk","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2996","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=2996"}],"version-history":[{"count":4,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2996\/revisions"}],"predecessor-version":[{"id":12977,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2996\/revisions\/12977"}],"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=2996"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2996"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2996"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}