{"id":3250,"date":"2025-06-02T15:51:25","date_gmt":"2025-06-04T08:27:24","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=3250"},"modified":"2025-06-04T15:51:25","modified_gmt":"2025-06-04T08:27:24","slug":"%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84typing%e6%a8%a1%e7%b5%84","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/python\/%e4%ba%86%e8%a7%a3python%e4%b8%ad%e7%9a%84typing%e6%a8%a1%e7%b5%84\/","title":{"rendered":"\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 Typing \u6a21\u7d44\uff1a2025 \u6700\u65b0\u8a9e\u6cd5\u8207\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Python, typing, \u985e\u578b\u63d0\u793a, Python Typing \u6a21\u7d44\"><\/p>\n<h1>\u6df1\u5165\u4e86\u89e3 Python \u4e2d\u7684 Typing \u6a21\u7d44<\/h1>\n<p>Python \u7684 `typing` \u6a21\u7d44\u662f\u4e00\u500b\u7528\u65bc\u63d0\u4f9b\u985e\u578b\u63d0\u793a\u7684\u5f37\u5927\u5de5\u5177\uff0c\u80fd\u8b93\u958b\u767c\u8005\u5728\u7a0b\u5f0f\u78bc\u4e2d\u6e05\u6670\u5730\u6307\u5b9a\u8b8a\u6578\u7684\u985e\u578b\uff0c\u4ee5\u53ca\u51fd\u5f0f\u7684\u53c3\u6578\u548c\u56de\u50b3\u503c\u7684\u985e\u578b\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\uff0c\u9084\u80fd\u986f\u8457\u6e1b\u5c11\u932f\u8aa4\u7684\u6a5f\u7387\u3002\u96a8\u8457 Python \u7684\u9032\u6b65\uff0c\u7279\u5225\u662f\u5728 2025 \u5e74\u7684\u6700\u65b0\u8a9e\u6cd5\u4e2d\uff0c`typing` \u6a21\u7d44\u5df2\u7d93\u8b8a\u5f97\u66f4\u70ba\u5f37\u5927\u548c\u9748\u6d3b\u3002<\/p>\n<p><!--more--><\/p>\n<p>## 1. \u57fa\u672c\u985e\u578b\u63d0\u793a<\/p>\n<p>`typing` \u6a21\u7d44\u63d0\u4f9b\u4e86\u4e00\u7cfb\u5217\u7684\u985e\u578b\u63d0\u793a\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u660e\u78ba\u6307\u5b9a\u8b8a\u6578\u548c\u51fd\u5f0f\u7684\u985e\u578b\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u8981\u5b9a\u7fa9\u4e00\u500b\u51fd\u5f0f\uff0c\u63a5\u53d7\u4e00\u500b\u5b57\u4e32\u53c3\u6578\uff0c\u4e26\u56de\u50b3\u4e00\u500b\u6574\u6578\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u7684\u7a0b\u5f0f\u78bc\uff1a<\/p>\n<p>&#8220;`python<br \/>\nfrom typing import *<\/p>\n<p>def my_function(s: str) -> int:<br \/>\n    return len(s)<br \/>\n&#8220;`<\/p>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 `typing` \u6a21\u7d44\u7684 `str` \u548c `int` \u985e\u578b\u63d0\u793a\uff0c\u660e\u78ba\u5730\u6307\u5b9a\u51fd\u5f0f\u7684\u53c3\u6578\u548c\u56de\u50b3\u503c\u7684\u985e\u578b\u3002\u9019\u6a23\u7684\u505a\u6cd5\u4f7f\u7a0b\u5f0f\u78bc\u7684\u610f\u5716\u66f4\u52a0\u6e05\u6670\uff0c\u4e5f\u964d\u4f4e\u4e86\u51fa\u932f\u7684\u98a8\u96aa\u3002<\/p>\n<p>## 2. \u8907\u96dc\u8cc7\u6599\u7d50\u69cb\u7684\u985e\u578b\u63d0\u793a<\/p>\n<p>\u9664\u4e86\u57fa\u672c\u985e\u578b\uff0c`typing` \u6a21\u7d44\u9084\u652f\u63f4\u8907\u96dc\u8cc7\u6599\u7d50\u69cb\u7684\u985e\u578b\u63d0\u793a\uff0c\u4f8b\u5982 `List`\u3001`Dict`\u3001`Tuple` \u7b49\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5b9a\u7fa9\u4e00\u500b\u63a5\u53d7\u5b57\u5178\u4e26\u56de\u50b3\u5217\u8868\u7684\u51fd\u5f0f\u7684\u7bc4\u4f8b\uff1a<\/p>\n<p>&#8220;`python<br \/>\nfrom typing import Dict, List<\/p>\n<p>def my_function(d: Dict[str, int]) -> List[str]:<br \/>\n    return list(d.keys())<br \/>\n&#8220;`<\/p>\n<p>\u5728\u9019\u6bb5\u7a0b\u5f0f\u78bc\u4e2d\uff0c\u6211\u5011\u4f7f\u7528 `Dict` \u548c `List` \u985e\u578b\u63d0\u793a\uff0c\u9019\u4f7f\u5f97\u51fd\u5f0f\u7684\u7d50\u69cb\u66f4\u52a0\u660e\u78ba\uff0c\u4e26\u4e14\u6709\u52a9\u65bc\u958b\u767c\u8005\u7406\u89e3\u8cc7\u6599\u6d41\u3002<\/p>\n<p>## 3. \u932f\u8aa4\u6392\u9664\u8207\u6700\u4f73\u5be6\u8e10<\/p>\n<p>\u5728\u4f7f\u7528 `typing` \u6a21\u7d44\u6642\uff0c\u78ba\u4fdd\u4f60\u4f7f\u7528\u7684\u985e\u578b\u63d0\u793a\u8207\u5be6\u969b\u8cc7\u6599\u985e\u578b\u76f8\u7b26\u3002\u4f8b\u5982\uff0c\u82e5\u4f7f\u7528 `List`\uff0c\u8acb\u78ba\u4fdd\u50b3\u5165\u7684\u8cc7\u6599\u78ba\u5be6\u662f\u5217\u8868\u3002\u82e5\u4e0d\u78ba\u5b9a\u8cc7\u6599\u985e\u578b\uff0c\u53ef\u4ee5\u4f7f\u7528 `Optional` \u4f86\u8868\u793a\u67d0\u500b\u8b8a\u6578\u53ef\u4ee5\u662f\u67d0\u7a2e\u985e\u578b\u6216 `None`\uff1a<\/p>\n<p>&#8220;`python<br \/>\nfrom typing import Optional<\/p>\n<p>def my_function(s: Optional[str]) -> int:<br \/>\n    if s is None:<br \/>\n        return 0<br \/>\n    return len(s)<br \/>\n&#8220;`<\/p>\n<p>\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u56e0\u70ba `None` \u5c0e\u81f4\u7684\u932f\u8aa4\u3002<\/p>\n<p>## 4. \u5ef6\u4f38\u61c9\u7528<\/p>\n<p>\u4f7f\u7528 `typing` \u6a21\u7d44\u7684\u597d\u8655\u4e0d\u50c5\u9650\u65bc\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u53ef\u8b80\u6027\uff0c\u9084\u80fd\u5728\u4f7f\u7528\u975c\u614b\u6aa2\u67e5\u5de5\u5177\uff08\u5982 `mypy`\uff09\u6642\uff0c\u63d0\u4f9b\u66f4\u597d\u7684\u985e\u578b\u6aa2\u67e5\u3002\u9019\u5c0d\u65bc\u5927\u578b\u5c08\u6848\u7684\u7dad\u8b77\u53ca\u5718\u968a\u5408\u4f5c\u5c24\u70ba\u91cd\u8981\u3002<\/p>\n<p>\u82e5\u9700\u8981\u6df1\u5165\u4e86\u89e3 Python \u7684\u985e\u578b\u6aa2\u67e5\uff0c\u5efa\u8b70\u53c3\u8003 [\u9019\u7bc7\u6559\u5b78](https:\/\/vocus.cc\/article\/63f9e0c8fd89780001a7a0cd) \u4ee5\u7372\u53d6\u66f4\u591a\u8cc7\u8a0a\u3002<\/p>\n<p>\u7e3d\u7d50\u4f86\u8aaa\uff0cPython \u7684 `typing` \u6a21\u7d44\u5728 2025 \u5e74\u7684\u6700\u65b0\u8a9e\u6cd5\u4e2d\uff0c\u70ba\u958b\u767c\u8005\u63d0\u4f9b\u4e86\u66f4\u5f37\u5927\u7684\u5de5\u5177\uff0c\u4ee5\u4fbf\u5728\u7a0b\u5f0f\u78bc\u4e2d\u6e05\u6670\u5730\u6307\u5b9a\u8b8a\u6578\u7684\u985e\u578b\uff0c\u4ee5\u53ca\u51fd\u5f0f\u7684\u53c3\u6578\u548c\u56de\u50b3\u503c\u7684\u985e\u578b\uff0c\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\uff0c\u4e5f\u5927\u5e45\u964d\u4f4e\u4e86\u51fa\u932f\u7684\u6a5f\u7387\u3002<\/p>\n<p>## Q&#038;A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/p>\n<p>**Q1: \u70ba\u4ec0\u9ebc\u8981\u4f7f\u7528 Python \u7684 typing \u6a21\u7d44\uff1f**<br \/>\nA1: \u4f7f\u7528 `typing` \u6a21\u7d44\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\uff0c\u4e26\u6e1b\u5c11\u7a0b\u5f0f\u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n<p>**Q2: \u5982\u4f55\u5728\u51fd\u5f0f\u4e2d\u4f7f\u7528\u591a\u7a2e\u985e\u578b\uff1f**<br \/>\nA2: \u53ef\u4ee5\u4f7f\u7528 `Union` \u4f86\u6307\u5b9a\u51fd\u5f0f\u7684\u53c3\u6578\u53ef\u4ee5\u63a5\u53d7\u591a\u7a2e\u4e0d\u540c\u985e\u578b\u3002\u4f8b\u5982\uff1a`Union[str, int]`\u3002<\/p>\n<p>**Q3: typing \u6a21\u7d44\u662f\u5426\u5f71\u97ff\u7a0b\u5f0f\u7684\u57f7\u884c\u6548\u80fd\uff1f**<br \/>\nA3: \u4e0d\u6703\uff0c`typing` \u6a21\u7d44\u4e3b\u8981\u7528\u65bc\u975c\u614b\u6aa2\u67e5\uff0c\u5c0d\u57f7\u884c\u6548\u80fd\u4e0d\u6703\u6709\u4efb\u4f55\u5f71\u97ff\u3002<br \/>\n&#8212;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3Python\u4e2d\u7684Typing\u6a21\u7d44\uff0c\u53ef\u4ee5\u66f4\u6709\u6548\u5730\u64b0\u5beb\u7a0b\u5f0f\u78bc\uff0c\u63d0\u9ad8\u7a0b\u5f0f\u78bc\u7684\u53ef\u8b80\u6027\u548c\u53ef\u7dad\u8b77\u6027\uff0c\u4e26\u6e1b\u5c11\u7a0b\u5f0f\u78bc\u51fa\u932f\u7684\u6a5f\u6703\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-3250","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-Qq","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3250","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=3250"}],"version-history":[{"count":1,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3250\/revisions"}],"predecessor-version":[{"id":3251,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/posts\/3250\/revisions\/3251"}],"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=3250"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/categories?post=3250"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/badgameshow.com\/steven\/wp-json\/wp\/v2\/tags?post=3250"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}