<\/p>\n
Python \u4e2d\u7684 `map()` \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u8b93\u4f60\u5c0d\u4e00\u500b\u53ef\u8fed\u4ee3\u7684\u7269\u4ef6\uff08\u5982\u5217\u8868\u3001\u5b57\u5178\u3001\u5143\u7d44\u7b49\uff09\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u4e00\u500b\u51fd\u6578\uff0c\u4e26\u5c07\u7d50\u679c\u6536\u96c6\u8d77\u4f86\uff0c\u5f62\u6210\u4e00\u500b\u65b0\u7684\u53ef\u8fed\u4ee3\u7269\u4ef6\u3002\u9019\u4f7f\u5f97\u5728\u8655\u7406\u8cc7\u6599\u6642\u66f4\u70ba\u65b9\u4fbf\u548c\u9ad8\u6548\u3002<\/p>\n
## \u57fa\u672c\u8a9e\u6cd5<\/p>\n
`map()` \u51fd\u6578\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
“`python
\nmap(function, iterable, …)
\n“`<\/p>\n
– `function` \u662f\u8981\u57f7\u884c\u7684\u51fd\u6578\u3002
\n– `iterable` \u662f\u8981\u88ab\u57f7\u884c\u51fd\u6578\u7684\u53ef\u8fed\u4ee3\u7269\u4ef6\uff0c\u53ef\u4ee5\u6709\u591a\u500b\u53ef\u8fed\u4ee3\u7269\u4ef6\uff0c\u4f46\u5fc5\u9808\u6ce8\u610f\u6240\u6709\u53ef\u8fed\u4ee3\u7269\u4ef6\u7684\u5143\u7d20\u6578\u91cf\u5fc5\u9808\u4e00\u81f4\uff0c\u5426\u5247\u6703\u51fa\u73fe\u932f\u8aa4\u3002<\/p>\n
## \u5be6\u4f5c\u7bc4\u4f8b<\/p>\n
### \u4f8b\u5b501\uff1a\u8a08\u7b97\u5e73\u65b9<\/p>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5217\u8868\uff0c\u88e1\u9762\u6709\u4e00\u4e9b\u6578\u5b57\uff0c\u6211\u5011\u60f3\u8981\u5c0d\u6bcf\u500b\u6578\u5b57\u6c42\u5e73\u65b9\uff0c\u53ef\u4ee5\u4f7f\u7528 `map()` \u51fd\u6578\u4f86\u5b8c\u6210\uff1a<\/p>\n
“`python
\nnumbers = [1, 2, 3, 4, 5]\n
def square(x):
\n return x * x<\/p>\n
squares = list(map(square, numbers))<\/p>\n
print(squares)
\n“`<\/p>\n
\u57f7\u884c\u7d50\u679c\uff1a<\/p>\n
“`python
\n[1, 4, 9, 16, 25]\n“`<\/p>\n
### \u4f8b\u5b502\uff1a\u5169\u500b\u5217\u8868\u7684\u52a0\u6cd5\u904b\u7b97<\/p>\n
`map()` \u51fd\u6578\u9084\u53ef\u4ee5\u63a5\u53d7\u591a\u500b\u53ef\u8fed\u4ee3\u7269\u4ef6\uff0c\u4f8b\u5982\uff0c\u6211\u5011\u53ef\u4ee5\u5c0d\u5169\u500b\u5217\u8868\u4e2d\u7684\u5143\u7d20\u505a\u52a0\u6cd5\u904b\u7b97\uff1a<\/p>\n
“`python
\nnumbers1 = [1, 2, 3, 4, 5]\nnumbers2 = [6, 7, 8, 9, 10]\n
def add(x, y):
\n return x + y<\/p>\n
sums = list(map(add, numbers1, numbers2))<\/p>\n
print(sums)
\n“`<\/p>\n
\u57f7\u884c\u7d50\u679c\uff1a<\/p>\n
“`python
\n[7, 9, 11, 13, 15]\n“`<\/p>\n
## \u932f\u8aa4\u6392\u9664<\/p>\n
\u5728\u4f7f\u7528 `map()` \u51fd\u6578\u6642\uff0c\u5e38\u898b\u7684\u932f\u8aa4\u5305\u62ec\uff1a<\/p>\n
1. **\u53ef\u8fed\u4ee3\u7269\u4ef6\u9577\u5ea6\u4e0d\u4e00\u81f4**\uff1a\u5982\u679c\u63d0\u4f9b\u591a\u500b\u53ef\u8fed\u4ee3\u7269\u4ef6\uff0c\u8acb\u78ba\u4fdd\u5b83\u5011\u7684\u9577\u5ea6\u76f8\u540c\uff0c\u5426\u5247\u6703\u5f15\u767c `ValueError`\u3002<\/p>\n
2. **\u51fd\u6578\u672a\u6b63\u78ba\u5b9a\u7fa9**\uff1a\u78ba\u4fdd\u50b3\u5165\u7684\u51fd\u6578\u80fd\u5920\u6b63\u78ba\u8655\u7406\u50b3\u5165\u7684\u53c3\u6578\u6578\u91cf\u3002<\/p>\n
## \u5ef6\u4f38\u61c9\u7528<\/p>\n
– \u4f7f\u7528 `map()` \u51fd\u6578\u53ef\u4ee5\u5927\u5927\u63d0\u9ad8\u8cc7\u6599\u8655\u7406\u7684\u6548\u7387\uff0c\u7279\u5225\u662f\u9762\u5c0d\u5927\u578b\u6578\u64da\u96c6\u6642\u3002
\n– \u7d50\u5408 `filter()` \u51fd\u6578\uff0c\u53ef\u4ee5\u9032\u4e00\u6b65\u7be9\u9078\u51fa\u7b26\u5408\u689d\u4ef6\u7684\u5143\u7d20\u3002<\/p>\n
## \u7d50\u8a9e<\/p>\n
\u7e3d\u7d50\u4f86\u8aaa\uff0cPython \u4e2d\u7684 `map()` \u51fd\u6578\u53ef\u4ee5\u8b93\u4f60\u5c0d\u4e00\u500b\u53ef\u8fed\u4ee3\u7269\u4ef6\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u4e00\u500b\u51fd\u6578\uff0c\u4e26\u5c07\u7d50\u679c\u6536\u96c6\u8d77\u4f86\uff0c\u5f62\u6210\u4e00\u500b\u65b0\u7684\u53ef\u8fed\u4ee3\u7269\u4ef6\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u7a0b\u5f0f\u7684\u6548\u7387\uff0c\u4e5f\u4f7f\u5f97\u4ee3\u78bc\u66f4\u52a0\u7c21\u6f54\u6613\u8b80\u3002<\/p>\n
\u5982\u9700\u9032\u4e00\u6b65\u4e86\u89e3 Python \u7684\u5176\u4ed6\u529f\u80fd\uff0c\u8acb\u53c3\u8003 [\u9019\u88e1\u7684\u6559\u5b78\u8cc7\u6e90](https:\/\/vocus.cc)\uff01<\/p>\n
## Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n
### 1. `map()` \u51fd\u6578\u662f\u5426\u6703\u6539\u8b8a\u539f\u59cb\u7684\u53ef\u8fed\u4ee3\u7269\u4ef6\uff1f<\/p>\n
\u4e0d\u6703\uff0c`map()` \u51fd\u6578\u6703\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u53ef\u8fed\u4ee3\u7269\u4ef6\uff0c\u800c\u4e0d\u6703\u6539\u8b8a\u539f\u59cb\u7684\u53ef\u8fed\u4ee3\u7269\u4ef6\u3002<\/p>\n
### 2. \u4f7f\u7528 `map()` \u51fd\u6578\u6642\u53ef\u4ee5\u7528 lambda \u51fd\u6578\u55ce\uff1f<\/p>\n
\u662f\u7684\uff0c\u60a8\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528 lambda \u51fd\u6578\u4f86\u5b9a\u7fa9 `function`\uff0c\u9019\u6a23\u53ef\u4ee5\u4f7f\u4ee3\u78bc\u66f4\u7c21\u6f54\u3002\u4f8b\u5982\uff1a<\/p>\n
“`python
\nnumbers = [1, 2, 3, 4, 5]\nsquares = list(map(lambda x: x * x, numbers))
\n“`<\/p>\n
### 3. `map()` \u51fd\u6578\u7684\u6027\u80fd\u5982\u4f55\uff1f<\/p>\n
\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u6642\uff0c`map()` \u51fd\u6578\u7684\u6027\u80fd\u901a\u5e38\u6bd4\u4f7f\u7528\u5faa\u74b0\u4f86\u8655\u7406\u8cc7\u6599\u8981\u9ad8\u6548\uff0c\u56e0\u70ba\u5b83\u662f\u57fa\u65bc C \u8a9e\u8a00\u5be6\u73fe\u7684\u5167\u90e8\u51fd\u6578\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3Python\u4e2d\u7684map()\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u8b93\u4f60\u66f4\u8f15\u9b06\u5730\u5c0d\u5217\u8868\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u64cd\u4f5c\uff0c\u66f4\u5feb\u5730\u5b8c\u6210\u5de5\u4f5c\u3002\u672c\u6587\u5c07\u4ecb\u7d39map()\u51fd\u6578\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5b83\u5982\u4f55\u5e6b\u52a9\u4f60\u66f4\u6709\u6548\u5730\u5b8c\u6210\u5de5\u4f5c\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-3202","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-PE","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3202","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=3202"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3202\/revisions"}],"predecessor-version":[{"id":3203,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3202\/revisions\/3203"}],"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=3202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}