{"id":204356,"date":"2025-05-29T10:32:27","date_gmt":"2025-05-29T02:32:27","guid":{"rendered":"https:\/\/server.hk\/cnblog\/204356\/"},"modified":"2025-05-29T10:32:27","modified_gmt":"2025-05-29T02:32:27","slug":"%e5%a6%82%e4%bd%95%e8%8e%b7%e5%8f%96-uniontype-%e7%9a%84%e5%ad%90%e6%88%90%e5%91%98%e5%b9%b6%e5%88%a4%e6%96%ad%e7%b1%bb%e5%9e%8b%e6%98%af%e5%90%a6%e5%9c%a8%e5%85%b6%e4%b8%ad%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/204356\/","title":{"rendered":"\u5982\u4f55\u83b7\u53d6 UnionType \u7684\u5b50\u6210\u5458\u5e76\u5224\u65ad\u7c7b\u578b\u662f\u5426\u5728\u5176\u4e2d\uff1f"},"content":{"rendered":"

<\/b> <\/p>\n

\u5982\u4f55\u83b7\u53d6 UnionType \u7684\u5b50\u6210\u5458\u5e76\u5224\u65ad\u7c7b\u578b\u662f\u5426\u5728\u5176\u4e2d\uff1f<\/h1>\n

\u5927\u5bb6\u597d\uff0c\u6211\u4eec\u53c8\u89c1\u9762\u4e86\u554a~\u672c\u6587\u7684\u5185\u5bb9\u4e2d\u5c06\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u3002\u5982\u679c\u4f60\u6b63\u5728\u5b66\u4e60\u6587\u7ae0<\/span>\u76f8\u5173\u77e5\u8bc6\uff0c\u6b22\u8fce\u5173\u6ce8\u6211\uff0c\u4ee5\u540e\u4f1a\u7ed9\u5927\u5bb6\u5e26\u6765\u66f4\u591a\u6587\u7ae0<\/span>\u76f8\u5173\u6587\u7ae0\uff0c\u5e0c\u671b\u6211\u4eec\u80fd\u4e00\u8d77\u8fdb\u6b65\uff01\u4e0b\u9762\u5c31\u5f00\u59cb\u672c\u6587\u7684\u6b63\u5f0f\u5185\u5bb9~<\/p>\n

<\/p>\n

\u5982\u4f55\u83b7\u53d6 uniontype \u7684\u5b50\u6210\u5458<\/strong><\/p>\n

\u5229\u7528 uniontype \u53ef\u8868\u793a\u591a\u4e2a\u7c7b\u578b\u7684\u8054\u5408\u4f53\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u53ef\u80fd\u9700\u8981\u83b7\u53d6\u5e76\u5224\u65ad\u5176\u5b50\u7c7b\u578b\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u89e3\u51b3\u6b64\u95ee\u9898\u3002<\/p>\n

\u5224\u65ad\u7c7b\u578b\u662f\u5426\u5728 uniontype \u4e2d<\/strong><\/p>\n

\u53ef\u4ee5\u4f7f\u7528 typing.get_args \u6765\u83b7\u53d6 uniontype \u7684\u5b50\u6210\u5458\uff0c\u5177\u4f53\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

from typing import union\n\ntype_hint = union[str, int]\nget_args(type_hint)  # [str, int]<\/pre>\n
\u8fd9\u6837\u5c31\u53ef\u4ee5\u83b7\u53d6\u5230 uniontype \u7684\u5b50\u6210\u5458\u5217\u8868\u3002<\/p>\n
\u5224\u65ad\u5b57\u7b26\u4e32\u662f\u5426\u5728 uniontype \u4e2d<\/strong><\/p>\n
\u4e3a\u4e86\u5224\u65ad\u4e00\u4e2a\u5b57\u7b26\u4e32\u662f\u5426\u5728 uniontype \u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 isinstance \u51fd\u6570\uff1a<\/p>\n
from typing import Union\n\ntype_hint = Union[str, int]\nisinstance(\"\", type_hint)  # True\nisinstance(10, type_hint)  # False<\/pre>\n
\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300a\u5982\u4f55\u83b7\u53d6 UnionType \u7684\u5b50\u6210\u5458\u5e76\u5224\u65ad\u7c7b\u578b\u662f\u5426\u5728\u5176\u4e2d\uff1f\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8e\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5982\u4f55\u83b7\u53d6 UnionType \u7684...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-204356","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204356","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=204356"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/204356\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=204356"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=204356"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=204356"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}