<\/p>\n
Python \u7684 `reduce()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5b83\u80fd\u5c07\u4e00\u500b\u51fd\u6578\u61c9\u7528\u65bc\u4e00\u500b\u5e8f\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\uff0c\u4e26\u5c07\u7d50\u679c\u9032\u884c\u7d2f\u7a4d\u3002\u9019\u8b93\u5b83\u5728\u8655\u7406\u4e00\u4e9b\u8907\u96dc\u7684\u8a08\u7b97\u6642\u8b8a\u5f97\u975e\u5e38\u6709\u7528\uff0c\u4f8b\u5982\u8a08\u7b97\u5e8f\u5217\u4e2d\u6240\u6709\u5143\u7d20\u7684\u7e3d\u548c\u6216\u4e58\u7a4d\u3002<\/p>\n
### `reduce()` \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5<\/p>\n
`reduce()` \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
“`python
\nfrom functools import reduce<\/p>\n
reduce(function, sequence[, initial])
\n“`<\/p>\n
– **function**: \u63a5\u53d7\u5169\u500b\u53c3\u6578\u7684\u51fd\u6578\uff0c\u7528\u65bc\u8a08\u7b97\u3002
\n– **sequence**: \u4e00\u500b\u5e8f\u5217\uff08\u5982\u5217\u8868\u3001\u5143\u7d44\u7b49\uff09\u3002
\n– **initial**: \u53ef\u9078\u7684\u521d\u59cb\u503c\uff0c\u5c07\u7528\u65bc\u7d2f\u7a4d\u8a08\u7b97\u7684\u521d\u59cb\u503c\u3002<\/p>\n
### \u4f8b\u5b50\uff1a\u8a08\u7b97\u7e3d\u548c<\/p>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5e8f\u5217 `[1, 2, 3, 4, 5]`\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 `reduce()` \u51fd\u6578\u4f86\u8a08\u7b97\u5b83\u5011\u7684\u7e3d\u548c\uff1a<\/p>\n
“`python
\nfrom functools import reduce<\/p>\n
def add(x, y):
\n return x + y<\/p>\n
lst = [1, 2, 3, 4, 5]\n
total_sum = reduce(add, lst)<\/p>\n
print(total_sum)
\n“`<\/p>\n
\u8f38\u51fa\u7d50\u679c\u70ba\uff1a<\/p>\n
“`
\n15
\n“`<\/p>\n
### \u4f8b\u5b50\uff1a\u8a08\u7b97\u4e58\u7a4d<\/p>\n
\u53e6\u5916\uff0c\u6211\u5011\u4e5f\u53ef\u4ee5\u4f7f\u7528 `reduce()` \u51fd\u6578\u4f86\u8a08\u7b97\u5e8f\u5217\u4e2d\u6240\u6709\u5143\u7d20\u7684\u4e58\u7a4d\uff1a<\/p>\n
“`python
\nfrom functools import reduce<\/p>\n
def mul(x, y):
\n return x * y<\/p>\n
lst = [1, 2, 3, 4, 5]\n
total_product = reduce(mul, lst)<\/p>\n
print(total_product)
\n“`<\/p>\n
\u8f38\u51fa\u7d50\u679c\u70ba\uff1a<\/p>\n
“`
\n120
\n“`<\/p>\n
### \u932f\u8aa4\u6392\u9664<\/p>\n
\u5728\u4f7f\u7528 `reduce()` \u51fd\u6578\u6642\uff0c\u5e38\u898b\u7684\u932f\u8aa4\u5305\u62ec\uff1a<\/p>\n
1. **\u51fd\u6578\u4e0d\u63a5\u53d7\u5169\u500b\u53c3\u6578**\uff1a\u78ba\u4fdd\u50b3\u5165\u7684\u51fd\u6578\u80fd\u63a5\u53d7\u5169\u500b\u53c3\u6578\u3002
\n2. **\u5e8f\u5217\u70ba\u7a7a**\uff1a\u7576\u5e8f\u5217\u70ba\u7a7a\u4e14\u672a\u63d0\u4f9b\u521d\u59cb\u503c\u6642\uff0c`reduce()` \u6703\u5f15\u767c `TypeError`\u3002<\/p>\n
### \u5ef6\u4f38\u61c9\u7528<\/p>\n
`reduce()` \u51fd\u6578\u4e0d\u50c5\u53ef\u4ee5\u7528\u65bc\u8a08\u7b97\u7e3d\u548c\u6216\u4e58\u7a4d\uff0c\u9084\u53ef\u4ee5\u7528\u65bc\u8a31\u591a\u5176\u4ed6\u8907\u96dc\u7684\u904b\u7b97\u3002\u4f8b\u5982\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u5b83\u4f86\u5408\u4f75\u5b57\u7b26\u4e32\u6216\u8a08\u7b97\u6700\u5927\u503c\u548c\u6700\u5c0f\u503c\u3002<\/p>\n
“`python
\n# \u5408\u4f75\u5b57\u7b26\u4e32
\nstrings = [“Python “, “is “, “awesome!”]\nresult = reduce(lambda x, y: x + y, strings)
\nprint(result) # \u8f38\u51fa: Python is awesome!
\n“`<\/p>\n
\u7e3d\u4e4b\uff0cPython \u7684 `reduce()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5c07\u4e00\u500b\u51fd\u6578\u61c9\u7528\u65bc\u4e00\u500b\u5e8f\u5217\u4e2d\u7684\u6bcf\u4e00\u500b\u5143\u7d20\uff0c\u4e26\u5c07\u7d50\u679c\u7d2f\u7a4d\u8d77\u4f86\u3002\u9019\u5728\u8655\u7406\u5404\u7a2e\u8907\u96dc\u8a08\u7b97\u6642\u975e\u5e38\u5be6\u7528\u3002\u60f3\u4e86\u89e3\u66f4\u591a\u95dc\u65bc Python \u7684\u6559\u5b78\uff0c\u8acb\u67e5\u770b [\u9019\u88e1](https:\/\/vocus.cc)\uff01<\/p>\n
### Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n
**Q1: `reduce()` \u53ef\u4ee5\u7528\u65bc\u54ea\u4e9b\u5834\u666f\uff1f**
\nA1: `reduce()` \u53ef\u4ee5\u7528\u65bc\u9700\u8981\u5c07\u5e8f\u5217\u4e2d\u7684\u5143\u7d20\u9032\u884c\u7d2f\u7a4d\u8a08\u7b97\u7684\u5834\u666f\uff0c\u5982\u8a08\u7b97\u7e3d\u548c\u3001\u4e58\u7a4d\u3001\u5408\u4f75\u5b57\u7b26\u4e32\u7b49\u3002<\/p>\n
**Q2: `reduce()` \u51fd\u6578\u8207\u5176\u4ed6\u51fd\u6578\u5982 `map()` \u548c `filter()` \u6709\u4f55\u4e0d\u540c\uff1f**
\nA2: `reduce()` \u662f\u5c07\u4e8c\u5143\u51fd\u6578\u61c9\u7528\u65bc\u5e8f\u5217\u7684\u7d2f\u7a4d\u8a08\u7b97\uff0c\u800c `map()` \u7528\u65bc\u5c07\u51fd\u6578\u61c9\u7528\u65bc\u5e8f\u5217\u7684\u6bcf\u500b\u5143\u7d20\uff0c`filter()` \u7528\u65bc\u904e\u6ffe\u5e8f\u5217\u4e2d\u7684\u5143\u7d20\u3002<\/p>\n
**Q3: \u5982\u4f55\u8655\u7406 `reduce()` \u4e2d\u7684 TypeError \u932f\u8aa4\uff1f**
\nA3: \u78ba\u4fdd\u50b3\u5165\u7684\u51fd\u6578\u63a5\u53d7\u5169\u500b\u53c3\u6578\uff0c\u4e26\u6aa2\u67e5\u5e8f\u5217\u662f\u5426\u70ba\u7a7a\uff0c\u5fc5\u8981\u6642\u63d0\u4f9b\u521d\u59cb\u503c\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3Python\u4e2d\u7684reduce()\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u5c07\u4e00\u500b\u51fd\u6578\u61c9\u7528\u5230\u4e00\u500b\u5e8f\u5217\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u4e0a\uff0c\u4e26\u5c07\u7d50\u679c\u7d2f\u7a4d\u5230\u4e00\u500b\u55ae\u4e00\u7684\u8f38\u51fa\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39reduce()\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5b83\u5982\u4f55\u61c9\u7528\u65bcPython\u7a0b\u5e8f\u4e2d\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-2830","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-JE","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2830","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=2830"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2830\/revisions"}],"predecessor-version":[{"id":2831,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2830\/revisions\/2831"}],"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=2830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}