<\/p>\n
Python \u4e2d\u7684 map() \u51fd\u6578\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u5b83\u53ef\u4ee5\u5c07\u6307\u5b9a\u7684\u51fd\u6578\u61c9\u7528\u5230\u53ef\u8fed\u4ee3\u5c0d\u8c61\uff08\u5982\u5217\u8868\uff09\u7684\u6bcf\u4e00\u500b\u5143\u7d20\u4e0a\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u4ee3\u78bc\u7684\u53ef\u8b80\u6027\uff0c\u4e5f\u80fd\u8b93\u4f60\u5728\u4e0d\u4f7f\u7528 for \u5faa\u74b0\u7684\u60c5\u6cc1\u4e0b\uff0c\u5feb\u901f\u8655\u7406\u6578\u64da\u3002<\/p>\n
### map() \u51fd\u6578\u7684\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**\uff1a\u8981\u61c9\u7528\u7684\u51fd\u6578\u3002
\n– **iterable**\uff1a\u9700\u8981\u6620\u5c04\u7684\u53ef\u8fed\u4ee3\u5c0d\u8c61\uff0c\u53ef\u4ee5\u662f\u5217\u8868\u3001\u5143\u7d44\u3001\u96c6\u5408\u7b49\u3002<\/p>\n
### \u5be6\u4f5c\u7bc4\u4f8b<\/p>\n
\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u5217\u8868\uff0c\u88e1\u9762\u5305\u542b\u4e86\u4e00\u4e9b\u6578\u5b57\uff1a<\/p>\n
“`python
\nnumbers = [1, 2, 3, 4, 5]\n“`<\/p>\n
\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 map() \u51fd\u6578\u4f86\u5c0d\u6bcf\u500b\u5143\u7d20\u9032\u884c\u64cd\u4f5c\uff0c\u4f8b\u5982\u5c07\u6bcf\u500b\u5143\u7d20\u90fd\u4e58\u4ee5 2\uff1a<\/p>\n
“`python
\ndef multiply_by_2(x):
\n return x * 2<\/p>\n
result = map(multiply_by_2, numbers)
\nprint(list(result)) # \u8f38\u51fa: [2, 4, 6, 8, 10]\n“`<\/p>\n
\u901a\u904e\u4ee5\u4e0a\u7a0b\u5f0f\u78bc\uff0c\u6211\u5011\u53ef\u4ee5\u770b\u5230 map() \u51fd\u6578\u5982\u4f55\u5c0d\u6bcf\u500b\u5143\u7d20\u57f7\u884c `multiply_by_2` \u51fd\u6578\uff0c\u4e26\u5c07\u7d50\u679c\u5b58\u5132\u5728 `result` \u4e2d\u3002<\/p>\n
### \u591a\u500b\u53ef\u8fed\u4ee3\u5c0d\u8c61\u7684\u4f7f\u7528<\/p>\n
map() \u51fd\u6578\u4e5f\u53ef\u4ee5\u63a5\u53d7\u591a\u500b\u53ef\u8fed\u4ee3\u5c0d\u8c61\u3002\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u5217\u8868\uff1a<\/p>\n
“`python
\nnumbers1 = [1, 2, 3]\nnumbers2 = [4, 5, 6]\n
def add(x, y):
\n return x + y<\/p>\n
result = map(add, numbers1, numbers2)
\nprint(list(result)) # \u8f38\u51fa: [5, 7, 9]\n“`<\/p>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cmap() \u51fd\u6578\u5c0d `numbers1` \u548c `numbers2` \u4e2d\u7684\u5143\u7d20\u57f7\u884c\u4e86 `add` \u51fd\u6578\uff0c\u4e26\u8fd4\u56de\u4e86\u5b83\u5011\u7684\u548c\u3002<\/p>\n
### \u932f\u8aa4\u6392\u9664<\/p>\n
\u5728\u4f7f\u7528 map() \u51fd\u6578\u6642\uff0c\u5e38\u898b\u7684\u932f\u8aa4\u4e4b\u4e00\u662f\u5617\u8a66\u5c07\u4e0d\u540c\u9577\u5ea6\u7684\u53ef\u8fed\u4ee3\u5c0d\u8c61\u50b3\u905e\u7d66 map()\uff0c\u9019\u6703\u5c0e\u81f4\u7d50\u679c\u4e0d\u5982\u9810\u671f\u3002\u78ba\u4fdd\u6240\u6709\u53ef\u8fed\u4ee3\u5c0d\u8c61\u7684\u9577\u5ea6\u4e00\u81f4\uff0c\u4ee5\u907f\u514d\u51fa\u73fe\u7d22\u5f15\u932f\u8aa4\u3002<\/p>\n
### \u5ef6\u4f38\u61c9\u7528<\/p>\n
map() \u51fd\u6578\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u7279\u5225\u6709\u7528\uff0c\u5c24\u5176\u662f\u5728\u6578\u64da\u79d1\u5b78\u548c\u6a5f\u5668\u5b78\u7fd2\u4e2d\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 map() \u4f86\u6a19\u6e96\u5316\u6578\u64da\u96c6\u4e2d\u7684\u6240\u6709\u6578\u503c\uff0c\u6216\u662f\u5c0d\u6587\u672c\u6578\u64da\u9032\u884c\u6e05\u7406\u3002<\/p>\n
### \u7d50\u8ad6<\/p>\n
\u7e3d\u7d50\u4f86\u8aaa\uff0cPython \u4e2d\u7684 map() \u51fd\u6578\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\uff0c\u5b83\u80fd\u5920\u8b93\u4f60\u5feb\u901f\u5730\u5c0d\u53ef\u8fed\u4ee3\u5c0d\u8c61\u4e2d\u7684\u6bcf\u500b\u5143\u7d20\u57f7\u884c\u6307\u5b9a\u7684\u51fd\u6578\uff0c\u800c\u4e0d\u9700\u8981\u5beb\u5197\u9577\u7684 for \u5faa\u74b0\u3002\u5229\u7528 map() \u51fd\u6578\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u78bc\u7684\u6548\u7387\u548c\u53ef\u8b80\u6027\uff0c\u662f\u6bcf\u4f4d Python \u958b\u767c\u8005\u90fd\u61c9\u638c\u63e1\u7684\u6280\u80fd\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a Python \u6559\u5b78\uff0c\u6b61\u8fce\u53c3\u8003 [vocus.cc \u7684 Python \u6559\u5b78\u6587\u7ae0](https:\/\/vocus.cc)\u3002<\/p>\n
### Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n
**Q1: map() \u51fd\u6578\u5728\u6027\u80fd\u4e0a\u6709\u4f55\u512a\u52e2\uff1f**
\nA1: map() \u51fd\u6578\u5728\u8655\u7406\u5927\u578b\u6578\u64da\u96c6\u6642\uff0c\u901a\u5e38\u6bd4 for \u5faa\u74b0\u66f4\u5feb\uff0c\u56e0\u70ba\u5b83\u662f\u7528 C \u8a9e\u8a00\u5be6\u73fe\u7684\uff0c\u80fd\u66f4\u6709\u6548\u7387\u5730\u8655\u7406\u6578\u64da\u3002<\/p>\n
**Q2: \u5982\u4f55\u8655\u7406 map() \u51fd\u6578\u7684\u8fd4\u56de\u503c\uff1f**
\nA2: map() \u51fd\u6578\u8fd4\u56de\u7684\u662f\u4e00\u500b\u8fed\u4ee3\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528 list() \u51fd\u6578\u5c07\u5176\u8f49\u63db\u70ba\u5217\u8868\uff0c\u6216\u8005\u4f7f\u7528 for \u5faa\u74b0\u9010\u4e00\u8a2a\u554f\u5143\u7d20\u3002<\/p>\n
**Q3: map() \u51fd\u6578\u53ef\u4ee5\u8207 lambda \u8868\u9054\u5f0f\u4e00\u8d77\u4f7f\u7528\u55ce\uff1f**
\nA3: \u662f\u7684\uff0cmap() \u51fd\u6578\u53ef\u4ee5\u8207 lambda \u8868\u9054\u5f0f\u7d50\u5408\u4f7f\u7528\uff0c\u9019\u6a23\u53ef\u4ee5\u5728\u4e0d\u5b9a\u7fa9\u984d\u5916\u51fd\u6578\u7684\u60c5\u6cc1\u4e0b\u9032\u884c\u7c21\u55ae\u7684\u64cd\u4f5c\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
map()\u51fd\u6578\u662fPython\u4e2d\u7684\u4e00\u500b\u5167\u5efa\u51fd\u6578\uff0c\u5b83\u53ef\u4ee5\u5c07\u4e00\u500b\u51fd\u6578\u7684\u7d50\u679c\u6620\u5c04\u5230\u53e6\u4e00\u500b\u5e8f\u5217\u4e0a\uff0c\u4e26\u8fd4\u56de\u4e00\u500b\u65b0\u7684\u5e8f\u5217\u3002\u672c\u6587\u5c07\u4ecb\u7d39map()\u51fd\u6578\u7684\u7528\u6cd5\uff0c\u4ee5\u53ca\u5b83\u5728Python\u4e2d\u7684\u61c9\u7528\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-2788","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-IY","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2788","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=2788"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2788\/revisions"}],"predecessor-version":[{"id":2789,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/2788\/revisions\/2789"}],"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=2788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=2788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=2788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}