<\/p>\n
\u5728 Python \u7de8\u7a0b\u4e2d\uff0c`get()` \u65b9\u6cd5\u662f\u4e00\u500b\u975e\u5e38\u5be6\u7528\u7684\u51fd\u5f0f\uff0c\u5c08\u9580\u7528\u4f86\u5f9e\u5b57\u5178\u4e2d\u5b89\u5168\u5730\u7372\u53d6\u7279\u5b9a\u7684\u503c\uff0c\u800c\u4e0d\u5fc5\u64d4\u5fc3\u8a72\u503c\u4e0d\u5b58\u5728\u7684\u60c5\u6cc1\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u8a73\u76e1\u4ecb\u7d39 `get()` \u65b9\u6cd5\u7684\u7528\u6cd5\uff0c\u5305\u62ec\u6700\u65b0\u7684\u8a9e\u6cd5\u3001\u5be6\u4f5c\u7bc4\u4f8b\u3001\u932f\u8aa4\u6392\u9664\u53ca\u5ef6\u4f38\u61c9\u7528\uff0c\u5e6b\u52a9\u4f60\u66f4\u597d\u5730\u638c\u63e1\u9019\u500b\u529f\u80fd\u3002<\/p>\n
### get() \u65b9\u6cd5\u7684\u8a9e\u6cd5<\/p>\n
`get()` \u65b9\u6cd5\u7684\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n
“`python
\ndict.get(key[, default])
\n“`<\/p>\n
– **key**\uff1a\u9700\u8981\u7372\u53d6\u7684\u9375\uff08key\uff09\u3002
\n– **default**\uff1a\u53ef\u9078\u53c3\u6578\uff0c\u5982\u679c\u5b57\u5178\u4e2d\u4e0d\u5b58\u5728\u8a72\u9375\uff0c\u5247\u8fd4\u56de\u6b64\u9810\u8a2d\u503c\u3002<\/p>\n
### \u5be6\u4f5c\u7bc4\u4f8b<\/p>\n
\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u6f14\u793a\u5982\u4f55\u4f7f\u7528 `get()` \u65b9\u6cd5\uff1a<\/p>\n
“`python
\nd = {‘name’: ‘John’, ‘age’: 20}<\/p>\n
# \u53d6\u5f97 name \u7684\u503c
\nname = d.get(‘name’)
\nprint(name) # \u8f38\u51fa: John<\/p>\n
# \u53d6\u5f97 gender \u7684\u503c\uff0c\u4e26\u8a2d\u5b9a\u9810\u8a2d\u70ba ‘Male’
\ngender = d.get(‘gender’, ‘Male’)
\nprint(gender) # \u8f38\u51fa: Male
\n“`<\/p>\n
\u5728\u4e0a\u9762\u7684\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5efa\u7acb\u4e86\u4e00\u500b\u5b57\u5178 `d`\uff0c\u5b83\u5305\u542b `name` \u548c `age` \u5169\u500b\u9375\uff0c\u5206\u5225\u5c0d\u61c9\u5230 ‘John’ \u548c 20\u3002\u7576\u5617\u8a66\u7372\u53d6 `gender` \u7684\u503c\u6642\uff0c\u7531\u65bc\u8a72\u9375\u4e0d\u5b58\u5728\uff0c`get()` \u65b9\u6cd5\u8fd4\u56de\u4e86\u9810\u8a2d\u503c ‘Male’\u3002<\/p>\n
### get() \u65b9\u6cd5\u7684\u512a\u9ede<\/p>\n
\u4f7f\u7528 `get()` \u65b9\u6cd5\u7372\u53d6\u5b57\u5178\u4e2d\u7684\u503c\u6709\u4ee5\u4e0b\u5e7e\u500b\u512a\u9ede\uff1a<\/p>\n
– **\u5b89\u5168\u6027**\uff1a\u4f7f\u7528 `get()` \u65b9\u6cd5\u53ef\u4ee5\u6709\u6548\u907f\u514d `KeyError` \u7684\u932f\u8aa4\uff0c\u8b93\u4ee3\u78bc\u66f4\u52a0\u7a69\u5b9a\u3002
\n– **\u7c21\u6f54\u6027**\uff1a\u4ee3\u78bc\u66f4\u52a0\u7c21\u6f54\uff0c\u4f7f\u7528 `get()` \u65b9\u6cd5\u53ef\u4ee5\u6d88\u9664\u5197\u9577\u7684\u689d\u4ef6\u5224\u65b7\u3002
\n– **\u53ef\u8b8a\u6027**\uff1a\u53ef\u4ee5\u9748\u6d3b\u6307\u5b9a\u9810\u8a2d\u503c\uff0c\u4f7f\u4ee3\u78bc\u66f4\u52a0\u901a\u7528\u548c\u6613\u65bc\u7dad\u8b77\u3002<\/p>\n
### \u5e38\u898b\u932f\u8aa4\u8207\u6392\u9664<\/p>\n
\u5728\u4f7f\u7528 `get()` \u65b9\u6cd5\u6642\uff0c\u6700\u5e38\u898b\u7684\u932f\u8aa4\u662f\u5fd8\u8a18\u63d0\u4f9b `default` \u53c3\u6578\uff0c\u9019\u53ef\u80fd\u5c0e\u81f4\u9810\u671f\u610f\u5916\u7684\u8fd4\u56de\u503c\u3002\u78ba\u4fdd\u5728\u5fc5\u8981\u6642\u63d0\u4f9b\u9810\u8a2d\u503c\uff0c\u4ee5\u9632\u6b62\u932f\u8aa4\u767c\u751f\u3002<\/p>\n
### \u5ef6\u4f38\u61c9\u7528<\/p>\n
`get()` \u65b9\u6cd5\u4e0d\u50c5\u9069\u7528\u65bc\u7c21\u55ae\u7684\u5b57\u5178\u67e5\u8a62\uff0c\u9084\u53ef\u4ee5\u8207\u5176\u4ed6 Python \u529f\u80fd\u7d50\u5408\u4f7f\u7528\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u5c07 `get()` \u65b9\u6cd5\u8207\u5217\u8868\u3001\u689d\u4ef6\u8868\u9054\u5f0f\u7b49\u7d50\u5408\uff0c\u4ee5\u5be6\u73fe\u66f4\u8907\u96dc\u7684\u908f\u8f2f\u3002<\/p>\n
### \u7e3d\u7d50<\/p>\n
Python \u7684 `get()` \u65b9\u6cd5\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u8b93\u4f60\u80fd\u5920\u5b89\u5168\u4e14\u9ad8\u6548\u5730\u7372\u53d6\u5b57\u5178\u4e2d\u7684\u503c\u3002\u900f\u904e\u672c\u6587\u7684\u4ecb\u7d39\uff0c\u76f8\u4fe1\u4f60\u5df2\u7d93\u638c\u63e1\u4e86 `get()` \u65b9\u6cd5\u7684\u57fa\u672c\u7528\u6cd5\u4ee5\u53ca\u5176\u512a\u9ede\u3002\u82e5\u4f60\u60f3\u6df1\u5165\u4e86\u89e3 Python \u7684\u5176\u4ed6\u5b57\u5178\u64cd\u4f5c\uff0c\u53ef\u4ee5\u53c3\u8003\u9019\u88e1\u7684 [Python \u5b57\u5178\u6559\u5b78](https:\/\/vocus.cc\/article\/XXXXXX)\u3002<\/p>\n
### Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n
**Q1: \u4f7f\u7528 `get()` \u65b9\u6cd5\u6642\uff0c\u9810\u8a2d\u503c\u53ef\u4ee5\u662f\u4ec0\u9ebc\u985e\u578b\uff1f**
\nA1: \u9810\u8a2d\u503c\u53ef\u4ee5\u662f\u4efb\u4f55\u8cc7\u6599\u985e\u578b\uff0c\u4f8b\u5982\u5b57\u7b26\u4e32\u3001\u6574\u6578\u3001\u5217\u8868\u7b49\uff0c\u751a\u81f3\u53ef\u4ee5\u662f `None`\u3002<\/p>\n
**Q2: \u5982\u4f55\u6aa2\u67e5\u5b57\u5178\u4e2d\u662f\u5426\u5b58\u5728\u67d0\u500b\u9375\uff1f**
\nA2: \u53ef\u4ee5\u4f7f\u7528 `in` \u95dc\u9375\u5b57\u4f86\u6aa2\u67e5\uff0c\u4f8b\u5982\uff1a`if ‘key’ in d:`\u3002<\/p>\n
**Q3: `get()` \u65b9\u6cd5\u7684\u6027\u80fd\u5982\u4f55\uff1f**
\nA3: `get()` \u65b9\u6cd5\u7684\u6027\u80fd\u512a\u65bc\u76f4\u63a5\u8a2a\u554f\u5b57\u5178\u9375\u7684\u65b9\u5f0f\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u8cc7\u6599\u6642\uff0c\u5b83\u53ef\u4ee5\u6709\u6548\u907f\u514d\u591a\u6b21\u6aa2\u67e5\u9375\u7684\u5b58\u5728\u6027\u3002<\/p>\n
—<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5b78\u7fd2Python\u7684get()\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8b93\u4f60\u66f4\u5feb\u901f\u5730\u53d6\u5f97\u5b57\u5178\u4e2d\u7684\u503c\uff0c\u800c\u4e0d\u7528\u64d4\u5fc3Key\u4e0d\u5b58\u5728\u7684\u554f\u984c\u3002\u672c\u6587\u5c07\u4ecb\u7d39Pythonget()\u65b9\u6cd5\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4f86\u63d0\u9ad8\u7a0b\u5f0f\u7684\u6548\u7387\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-3136","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-OA","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3136","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=3136"}],"version-history":[{"count":2,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3136\/revisions"}],"predecessor-version":[{"id":12929,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3136\/revisions\/12929"}],"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=3136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3136"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}