{"id":972469,"date":"2024-12-27T05:48:55","date_gmt":"2024-12-26T21:48:55","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/972469.html"},"modified":"2024-12-27T05:48:56","modified_gmt":"2024-12-26T21:48:56","slug":"python%e5%a6%82%e4%bd%95%e5%a2%9e%e5%8a%a0%e5%ad%97%e5%85%b8%e5%85%83%e7%b4%a0","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/972469.html","title":{"rendered":"python\u5982\u4f55\u589e\u52a0\u5b57\u5178\u5143\u7d20"},"content":{"rendered":"

\"python\u5982\u4f55\u589e\u52a0\u5b57\u5178\u5143\u7d20\"<\/p>\n

\u5728Python\u4e2d\u589e\u52a0\u5b57\u5178\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528\u8d4b\u503c\u8bed\u53e5\u3001update()\u65b9\u6cd5\u3001setdefault()\u65b9\u6cd5\u3001\u5b57\u9762\u91cf\u5408\u5e76\u548c\u5b57\u5178\u63a8\u5bfc\u7b49\u3002<\/strong>\u8fd9\u4e9b\u65b9\u6cd5\u5404\u6709\u5176\u7279\u70b9\uff0c\u9002\u7528\u4e8e\u4e0d\u540c\u7684\u5e94\u7528\u573a\u666f\u3002\u901a\u8fc7\u8d4b\u503c\u8bed\u53e5\u76f4\u63a5\u589e\u52a0\u952e\u503c\u5bf9\u662f\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\uff0c\u800cupdate()\u65b9\u6cd5\u53ef\u4ee5\u540c\u65f6\u589e\u52a0\u591a\u4e2a\u5143\u7d20\uff0csetdefault()\u5219\u53ef\u4ee5\u786e\u4fdd\u5728\u589e\u52a0\u65f6\u4e0d\u8986\u76d6\u5df2\u6709\u952e\u7684\u503c\u3002\u5b57\u9762\u91cf\u5408\u5e76\u548c\u5b57\u5178\u63a8\u5bfc\u63d0\u4f9b\u4e86\u66f4\u7075\u6d3b\u7684\u65b9\u5f0f\u6765\u521b\u5efa\u548c\u66f4\u65b0\u5b57\u5178\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u8d4b\u503c\u8bed\u53e5\u589e\u52a0\u5b57\u5178\u5143\u7d20<\/p>\n<\/p>\n

\u4f7f\u7528\u8d4b\u503c\u8bed\u53e5\u662f\u589e\u52a0\u5b57\u5178\u5143\u7d20\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u3002\u4f60\u53ea\u9700\u8981\u6307\u5b9a\u952e\u548c\u5bf9\u5e94\u7684\u503c\u5373\u53ef\u3002\u5982\u679c\u952e\u5df2\u7ecf\u5b58\u5728\u4e8e\u5b57\u5178\u4e2d\uff0c\u8be5\u952e\u7684\u503c\u4f1a\u88ab\u66f4\u65b0\uff1b\u5982\u679c\u952e\u4e0d\u5b58\u5728\uff0c\u5219\u4f1a\u88ab\u65b0\u589e\u3002<\/p>\n<\/p>\n

my_dict = {'a': 1, 'b': 2}<\/p>\n
my_dict['c'] = 3  # \u589e\u52a0\u65b0\u5143\u7d20<\/p>\n
my_dict['a'] = 4  # \u66f4\u65b0\u5df2\u6709\u5143\u7d20<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u7b80\u5355\u76f4\u89c2\uff0c\u975e\u5e38\u9002\u5408\u589e\u52a0\u5355\u4e2a\u5143\u7d20\u6216\u66f4\u65b0\u5355\u4e2a\u952e\u503c\u5bf9\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4f7f\u7528update()\u65b9\u6cd5\u589e\u52a0\u591a\u4e2a\u5b57\u5178\u5143\u7d20<\/p>\n<\/p>\n
update()\u65b9\u6cd5\u5141\u8bb8\u4f60\u540c\u65f6\u589e\u52a0\u591a\u4e2a\u5143\u7d20\u6216\u66f4\u65b0\u591a\u4e2a\u952e\u7684\u503c\u3002<\/strong>\u5b83\u63a5\u53d7\u4e00\u4e2a\u5b57\u5178\u6216\u53ef\u8fed\u4ee3\u7684\u952e\u503c\u5bf9\u4f5c\u4e3a\u53c2\u6570\u3002\u8be5\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u6279\u91cf\u589e\u52a0\u6216\u66f4\u65b0\u5b57\u5178\u5143\u7d20\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
my_dict = {'a': 1, 'b': 2}<\/p>\n
my_dict.update({'c': 3, 'd': 4})  # \u589e\u52a0\u591a\u4e2a\u65b0\u5143\u7d20<\/p>\n
my_dict.update(a=5, e=6)  # \u4f7f\u7528\u5173\u952e\u5b57\u53c2\u6570\u589e\u52a0\u6216\u66f4\u65b0\u5143\u7d20<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u975e\u5e38\u7075\u6d3b\uff0c\u53ef\u4ee5\u8f7b\u677e\u5730\u5904\u7406\u591a\u4e2a\u952e\u503c\u5bf9\u7684\u589e\u52a0\u6216\u66f4\u65b0\u3002<\/p>\n<\/p>\n
\u4e09\u3001setdefault()\u65b9\u6cd5\u589e\u52a0\u5b57\u5178\u5143\u7d20<\/p>\n<\/p>\n
setdefault()\u65b9\u6cd5\u7528\u4e8e\u5728\u5b57\u5178\u4e2d\u8bbe\u7f6e\u4e00\u4e2a\u9ed8\u8ba4\u503c\u3002\u5982\u679c\u952e\u4e0d\u5b58\u5728\u4e8e\u5b57\u5178\u4e2d\uff0c\u5b83\u4f1a\u589e\u52a0\u8be5\u952e\u5e76\u8bbe\u7f6e\u6307\u5b9a\u7684\u9ed8\u8ba4\u503c\uff1b\u5982\u679c\u952e\u5df2\u7ecf\u5b58\u5728\uff0c\u5219\u4e0d\u4f1a\u6539\u53d8\u952e\u7684\u503c\u3002<\/strong><\/p>\n<\/p>\n
my_dict = {'a': 1, 'b': 2}<\/p>\n
my_dict.setdefault('c', 3)  # \u589e\u52a0\u65b0\u5143\u7d20<\/p>\n
my_dict.setdefault('a', 4)  # \u952e\u5df2\u5b58\u5728\uff0c\u503c\u4e0d\u4f1a\u6539\u53d8<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be5\u65b9\u6cd5\u9002\u7528\u4e8e\u9700\u8981\u786e\u4fdd\u67d0\u4e2a\u952e\u5b58\u5728\u4e8e\u5b57\u5178\u4e2d\u5e76\u5177\u6709\u9ed8\u8ba4\u503c\u7684\u60c5\u51b5\u3002<\/p>\n<\/p>\n
\u56db\u3001\u4f7f\u7528\u5b57\u9762\u91cf\u5408\u5e76\u589e\u52a0\u5b57\u5178\u5143\u7d20<\/p>\n<\/p>\n
\u5728Python 3.9\u53ca\u4ee5\u4e0a\u7248\u672c\u4e2d\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u5b57\u9762\u91cf\u5408\u5e76\u64cd\u4f5c\u7b26|<\/code>\u6765\u5408\u5e76\u5b57\u5178\u3002\u8fd9\u79cd\u65b9\u5f0f\u65e2\u53ef\u4ee5\u589e\u52a0\u65b0\u5143\u7d20\uff0c\u4e5f\u53ef\u4ee5\u66f4\u65b0\u5df2\u6709\u5143\u7d20\u3002<\/p>\n<\/p>\n
my_dict = {'a': 1, 'b': 2}<\/p>\n
my_dict = my_dict | {'c': 3, 'd': 4}  # \u5408\u5e76\u5b57\u5178<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u79cd\u65b9\u6cd5\u7b80\u6d01\u9ad8\u6548\uff0c\u9002\u5408\u9700\u8981\u521b\u5efa\u65b0\u5b57\u5178\u4e14\u4e0d\u5f71\u54cd\u539f\u59cb\u5b57\u5178\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u5b57\u5178\u63a8\u5bfc\u589e\u52a0\u6216\u66f4\u65b0\u5b57\u5178\u5143\u7d20<\/p>\n<\/p>\n
\u5b57\u5178\u63a8\u5bfc\u53ef\u4ee5\u7528\u4e8e\u590d\u6742\u7684\u573a\u666f\uff0c\u5728\u521b\u5efa\u65b0\u5b57\u5178\u65f6\u52a8\u6001\u589e\u52a0\u6216\u66f4\u65b0\u5143\u7d20\u3002\u5b83\u63d0\u4f9b\u4e86\u4e00\u79cd\u7075\u6d3b\u7684\u65b9\u5f0f\u6765\u6839\u636e\u6761\u4ef6\u6216\u8ba1\u7b97\u7ed3\u679c\u751f\u6210\u5b57\u5178\u3002<\/strong><\/p>\n<\/p>\n
keys = ['a', 'b', 'c']<\/p>\n
values = [1, 2, 3]<\/p>\n
my_dict = {k: v for k, v in zip(keys, values)}  # \u4f7f\u7528\u5b57\u5178\u63a8\u5bfc\u751f\u6210\u5b57\u5178<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5b57\u5178\u63a8\u5bfc\u9002\u5408\u9700\u8981\u6839\u636e\u52a8\u6001\u6761\u4ef6\u6216\u8ba1\u7b97\u7ed3\u679c\u751f\u6210\u5b57\u5178\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n
\u603b\u7ed3\uff0cPython\u63d0\u4f9b\u4e86\u591a\u79cd\u7075\u6d3b\u7684\u65b9\u5f0f\u6765\u589e\u52a0\u5b57\u5178\u5143\u7d20\uff0c\u6ee1\u8db3\u5404\u79cd\u5e94\u7528\u9700\u6c42\u3002\u9009\u62e9\u5408\u9002\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u63d0\u9ad8\u4ee3\u7801\u7684\u7b80\u6d01\u6027\u548c\u53ef\u8bfb\u6027\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u6839\u636e\u5177\u4f53\u9700\u6c42\u9009\u62e9\u6700\u9002\u5408\u7684\u65b9\u6cd5\u6765\u64cd\u4f5c\u5b57\u5178\uff0c\u5c06\u6709\u52a9\u4e8e\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6548\u7387\u548c\u7ef4\u62a4\u6027\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u5982\u4f55\u5728Python\u4e2d\u5411\u5b57\u5178\u6dfb\u52a0\u65b0\u5143\u7d20\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u5411\u5b57\u5178\u6dfb\u52a0\u65b0\u5143\u7d20\u975e\u5e38\u7b80\u5355\u3002\u53ef\u4ee5\u76f4\u63a5\u4f7f\u7528\u65b0\u952e\u7684\u8d4b\u503c\u65b9\u5f0f\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6709\u4e00\u4e2a\u5b57\u5178my_dict<\/code>\uff0c\u8981\u6dfb\u52a0\u4e00\u4e2a\u952e\u4e3a"\u65b0\u952e"<\/code>\uff0c\u503c\u4e3a"\u65b0\u503c"<\/code>\u7684\u5143\u7d20\uff0c\u53ef\u4ee5\u4f7f\u7528my_dict["\u65b0\u952e"] = "\u65b0\u503c"<\/code>\u3002\u8fd9\u6837\u5c31\u4f1a\u5728\u5b57\u5178\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u65b0\u7684\u952e\u503c\u5bf9\u3002<\/p>\n
\u4f7f\u7528update\u65b9\u6cd5\u53ef\u4ee5\u5982\u4f55\u6279\u91cf\u6dfb\u52a0\u5b57\u5178\u5143\u7d20\uff1f<\/strong>
update()<\/code>\u65b9\u6cd5\u5141\u8bb8\u4f60\u6279\u91cf\u6dfb\u52a0\u591a\u4e2a\u952e\u503c\u5bf9\u5230\u5b57\u5178\u4e2d\u3002\u901a\u8fc7\u4f20\u5165\u53e6\u4e00\u4e2a\u5b57\u5178\u6216\u952e\u503c\u5bf9\u7684\u5143\u7ec4\u5217\u8868\uff0c\u53ef\u4ee5\u8f7b\u677e\u5b9e\u73b0\u3002\u4f8b\u5982\uff0cmy_dict.update({"\u952e1": "\u503c1", "\u952e2": "\u503c2"})<\/code>\u4f1a\u5c06"\u952e1"<\/code>\u548c"\u952e2"<\/code>\u53ca\u5176\u5bf9\u5e94\u7684\u503c\u6dfb\u52a0\u5230my_dict<\/code>\u4e2d\u3002\u8fd9\u79cd\u65b9\u5f0f\u975e\u5e38\u9002\u5408\u9700\u8981\u4e00\u6b21\u6027\u6dfb\u52a0\u591a\u4e2a\u5143\u7d20\u7684\u60c5\u51b5\u3002<\/p>\n
\u5728\u5b57\u5178\u4e2d\u6dfb\u52a0\u5143\u7d20\u65f6\u4f1a\u9047\u5230\u4ec0\u4e48\u5e38\u89c1\u95ee\u9898\uff1f<\/strong>
\u5728\u5411\u5b57\u5178\u6dfb\u52a0\u5143\u7d20\u65f6\uff0c\u5e38\u89c1\u95ee\u9898\u5305\u62ec\u8bd5\u56fe\u6dfb\u52a0\u5df2\u5b58\u5728\u7684\u952e\u3002\u82e5\u6dfb\u52a0\u76f8\u540c\u7684\u952e\uff0cPython\u4f1a\u81ea\u52a8\u66f4\u65b0\u8be5\u952e\u7684\u503c\u3002\u6b64\u5916\uff0c\u786e\u4fdd\u952e\u662f\u4e0d\u53ef\u53d8\u7c7b\u578b\uff0c\u5982\u5b57\u7b26\u4e32\u3001\u6570\u5b57\u6216\u5143\u7ec4\uff0c\u624d\u80fd\u4f5c\u4e3a\u5b57\u5178\u7684\u952e\u3002\u4f7f\u7528\u53ef\u53d8\u7c7b\u578b\uff08\u5982\u5217\u8868\u6216\u5b57\u5178\uff09\u4f5c\u4e3a\u952e\u4f1a\u5f15\u53d1TypeError<\/code>\u3002\u7406\u89e3\u8fd9\u4e9b\u7ec6\u8282\u53ef\u4ee5\u5e2e\u52a9\u907f\u514d\u610f\u5916\u9519\u8bef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u589e\u52a0\u5b57\u5178\u5143\u7d20\u7684\u65b9\u6cd5\u6709\u591a\u79cd\uff0c\u5305\u62ec\u4f7f\u7528\u8d4b\u503c\u8bed\u53e5\u3001update()\u65b9\u6cd5\u3001setdefault()\u65b9\u6cd5 […]","protected":false},"author":3,"featured_media":972477,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/972469"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=972469"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/972469\/revisions"}],"predecessor-version":[{"id":972479,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/972469\/revisions\/972479"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/972477"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=972469"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=972469"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=972469"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}