{"id":205230,"date":"2025-05-29T15:04:52","date_gmt":"2025-05-29T07:04:52","guid":{"rendered":"https:\/\/server.hk\/cnblog\/205230\/"},"modified":"2025-05-29T15:04:52","modified_gmt":"2025-05-29T07:04:52","slug":"python%e8%a3%85%e9%a5%b0%e5%99%a8%e5%8f%82%e6%95%b0%e5%a6%82%e4%bd%95%e9%80%9a%e8%bf%87inspect%e6%a8%a1%e5%9d%97%e8%8e%b7%e5%8f%96%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/205230\/","title":{"rendered":"Python\u88c5\u9970\u5668\u53c2\u6570\u5982\u4f55\u901a\u8fc7inspect\u6a21\u5757\u83b7\u53d6\uff1f"},"content":{"rendered":"

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

Python\u88c5\u9970\u5668\u53c2\u6570\u5982\u4f55\u901a\u8fc7inspect\u6a21\u5757\u83b7\u53d6\uff1f<\/h1>\n<\/p>\n

<\/p>\n

\u901a\u8fc7inspect\u83b7\u53d6\u88c5\u9970\u5668\u53c2\u6570\u7684\u96be\u9898<\/strong><\/p>\n

\u5728python\u4e2d\uff0cinspect\u6a21\u5757\u63d0\u4f9b\u4e86\u83b7\u53d6\u51fd\u6570\u5143\u6570\u636e\u7684\u65b9\u6cd5\u3002\u7136\u800c\uff0c\u83b7\u53d6\u88c5\u9970\u5668\u4f20\u5165\u7684\u53c2\u6570\u5374\u5e76\u975e\u6613\u4e8b\u3002<\/p>\n

\u4ee5\u4ee5\u4e0b\u4ee3\u7801\u4e3a\u4f8b\uff1a<\/p>\n

import inspect\nfrom functools import wraps\n\ndef task(_id, params):\n    \n    def decorator(func):\n        @wraps(func)\n        def wrapper(*args, **kwargs):\n            return func(*args, **kwargs)\n\n        return wrapper\n\n    return decorator\n\n@task(_id=\"aaa\", params=(1,2,3))\ndef foo(q=1):\n    ...\n\nif __name__ == '__main__':\n    print(inspect.getclosurevars(foo.__wrapped__).nonlocals)  # \u4e0d\u751f\u6548\uff0c\u671f\u671b\u83b7\u53d6(_id=\"aaa\", params=(1,2,3))\u4fe1\u606f<\/pre>\n
\u4f7f\u7528inspect.getclosurevars\u83b7\u53d6\u95ed\u5305\u53d8\u91cf\u4e0d\u8d77\u4f5c\u7528\uff0c\u56e0\u4e3a\u88c5\u9970\u5668\u5185\u90e8\u5b9a\u4e49\u7684\u53d8\u91cf\u4e0d\u5728foo.__wrapped__\u7684\u95ed\u5305\u4e2d\u3002<\/p>\n
\u89e3\u51b3\u65b9\u6848<\/strong><\/p>\n
inspect\u65e0\u6cd5\u76f4\u63a5\u83b7\u53d6\u88c5\u9970\u5668\u53c2\u6570\uff0c\u76ee\u524d\u6709\u4ee5\u4e0b\u53d8\u901a\u65b9\u6848\uff1a<\/p>\n
1. \u5728\u88c5\u9970\u5668\u5185\u90e8\u5b58\u50a8\u53c2\u6570<\/strong><\/p>\n
\u5728decorator\u51fd\u6570\u4e2d\u663e\u5f0f\u5b58\u50a8\u53c2\u6570\uff0c\u7136\u540e\u5728\u5305\u88c5\u5668\u51fd\u6570\u4e2d\u4f7f\u7528\u5b83\u4eec\u3002<\/p>\n
2. \u4f7f\u7528ast\u89e3\u6790\u4ee3\u7801<\/strong><\/p>\n
\u4f7f\u7528ast\u6a21\u5757\u89e3\u6790\u88c5\u9970\u5668\u7684\u4ee3\u7801\uff0c\u5e76\u63d0\u53d6\u53c2\u6570\u3002\u4e0d\u8fc7\uff0c\u8fd9\u79cd\u65b9\u6cd5\u4ec5\u9002\u7528\u4e8e\u7279\u5b9a\u7c7b\u578b\u7684\u4ee3\u7801\uff0c\u7f3a\u4e4f\u901a\u7528\u6027\u3002<\/p>\n
\u793a\u4f8b\u4ee3\u7801\uff1a<\/p>\n
import ast\n\ndef get_decorator_args(func):\n    source = inspect.getsource(func)\n    tree = ast.parse(source)\n\n    for node in ast.walk(tree):\n        if isinstance(node, ast.FunctionDef):\n            for decorator in node.decorator_list:\n                if isinstance(decorator, ast.Call) and decorator.func.id == \"task\":\n                    args = {\n                        arg.arg: ast.literal_eval(arg.value)\n                        for arg in decorator.keywords\n                    }\n                    return args\n    return {}\n\nprint(get_decorator_args(foo))  \n\n# {'_id': 'aaa', 'params': (1, 2, 3)}<\/pre>\n
\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u8be5\u89e3\u51b3\u65b9\u6848\u4ec5\u9002\u7528\u4e8e\u4e0a\u8ff0\u7279\u5b9a\u4ee3\u7801\u7247\u6bb5\u3002\u5bf9\u4e8e\u66f4\u590d\u6742\u7684\u88c5\u9970\u5668\uff0c\u53ef\u80fd\u9700\u8981\u5b9a\u5236\u5316\u7684\u89e3\u6790\u4ee3\u7801\u3002<\/p>\n
\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aPython\u88c5\u9970\u5668\u53c2\u6570\u5982\u4f55\u901a\u8fc7inspect\u6a21\u5757\u83b7\u53d6\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":"
Python\u88c5\u9970\u5668\u53c2\u6570\u5982\u4f55\u901a\u8fc7i...<\/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-205230","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205230","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=205230"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/205230\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=205230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=205230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=205230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}