{"id":199598,"date":"2025-05-04T23:38:19","date_gmt":"2025-05-04T15:38:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/?p=199598"},"modified":"2025-05-04T23:38:19","modified_gmt":"2025-05-04T15:38:19","slug":"%e6%8e%a2%e7%b4%a2python%e4%b8%ad%e5%8f%82%e6%95%b0%e4%bc%a0%e9%80%92%e4%b8%8enone%e7%9a%84%e9%ab%98%e7%ba%a7%e7%94%a8%e6%b3%95%ef%bc%9a%e5%8a%a9%e5%8a%9b%e5%bc%80%e5%8f%91%e7%81%b5%e6%b4%bb%e9%ab%98","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/199598\/","title":{"rendered":"\u63a2\u7d22Python\u4e2d\u53c2\u6570\u4f20\u9012\u4e0eNone\u7684\u9ad8\u7ea7\u7528\u6cd5\uff1a\u52a9\u529b\u5f00\u53d1\u7075\u6d3b\u9ad8\u6548\u7684\u5e94\u7528\u7cfb\u7edf"},"content":{"rendered":"<p>\u5728\u73b0\u4ee3\u5e94\u7528\u7cfb\u7edf\u5f00\u53d1\u4e2d\uff0c\u7075\u6d3b\u6027\u548c\u53ef\u6269\u5c55\u6027\u662f\u8861\u91cf\u4ee3\u7801\u8d28\u91cf\u7684\u5173\u952e\u6307\u6807\u4e4b\u4e00\u3002Python\u8bed\u8a00\u4e3a\u5f00\u53d1\u8005\u63d0\u4f9b\u4e86\u591a\u79cd\u7075\u6d3b\u7684\u53c2\u6570\u4f20\u9012\u65b9\u5f0f\uff0c\u5982<code>*args<\/code>\u548c<code>**kwargs<\/code>\uff0c\u540c\u65f6\u901a\u8fc7<code>None<\/code>\u5bf9\u8c61\u5904\u7406\u9ed8\u8ba4\u503c\u548c\u72b6\u6001\u5224\u65ad\uff0c\u8fd9\u4e9b\u7279\u6027\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u5c24\u4e3a\u91cd\u8981\u3002\u5c24\u5176\u662f\u5728\u4e91\u670d\u52a1\u548c\u670d\u52a1\u5668\u73af\u5883\u4e0b\u90e8\u7f72API\u65f6\uff0c\u8fd9\u4e9b\u6280\u80fd\u66f4\u662f\u5fc5\u4e0d\u53ef\u5c11\u3002<\/p>\n<p>\u672c\u6587\u5c06\u56f4\u7ed5\u4ee5\u4e0b\u51e0\u4e2a\u4e3b\u9898\u5c55\u5f00\u8ba8\u8bba\uff0c\u5e76\u7ed3\u5408\u5728\u9999\u6e2fVPS\u3001\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u73af\u5883\u4e0b\u7684\u5b9e\u9645\u5e94\u7528\u573a\u666f\uff0c\u4e3a\u5e7f\u5927\u6280\u672f\u4eba\u5458\u63d0\u4f9b\u5b9e\u7528\u6307\u5bfc\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528<code>*args<\/code>\u548c<code>**kwargs<\/code>\u5b9e\u73b0\u53ef\u53d8\u53c2\u6570\u51fd\u6570<\/li>\n<li>\u5229\u7528\u5e8f\u5217\u89e3\u5305\u4f18\u5316\u53c2\u6570\u4f20\u9012<\/li>\n<li>\u6b63\u786e\u7406\u89e3\u5e76\u4f7f\u7528<code>None<\/code>\u5bf9\u8c61<\/li>\n<li>\u5728\u5b9e\u9645\u90e8\u7f72\u4e2d\u5982\u4f55\u63d0\u5347\u7cfb\u7edf\u53ef\u7ef4\u62a4\u6027<\/li>\n<li>\u63a8\u8350\u4f7f\u7528\u9ad8\u6027\u80fd\u7684<a href=\"https:\/\/server.hk\/\">\u9999\u6e2f\u670d\u52a1\u5668\u4ea7\u54c1<\/a>\uff0c\u52a9\u60a8\u7a33\u5b9a\u90e8\u7f72Python\u670d\u52a1<\/li>\n<\/ul>\n<hr \/>\n<h2>\u4e00\u3001\u5b9e\u73b0\u7075\u6d3b\u53c2\u6570\u7684\u51fd\u6570\u8bbe\u8ba1\uff1a<code>*args<\/code> \u4e0e <code>**kwargs<\/code><\/h2>\n<p>\u5728\u6784\u5efa\u901a\u7528\u51fd\u6570\u6216\u6846\u67b6\u65f6\uff0c\u56fa\u5b9a\u6570\u91cf\u7684\u53c2\u6570\u5f80\u5f80\u65e0\u6cd5\u6ee1\u8db3\u590d\u6742\u9700\u6c42\u3002Python \u4e2d\u63d0\u4f9b\u7684 <code>*args<\/code> \u548c <code>**kwargs<\/code> \u8bed\u6cd5\u6781\u5927\u5730\u63d0\u5347\u4e86\u51fd\u6570\u7684\u9002\u5e94\u80fd\u529b\uff1a<\/p>\n<pre><code class=\"language-python\">def sum_all(*args):\r\n    return sum(args)\r\n\r\nprint(sum_all(1, 2, 3))        # \u8f93\u51fa: 6\r\nprint(sum_all())              # \u8f93\u51fa: 0\r\n<\/code><\/pre>\n<p><code>*args<\/code> \u5c06\u4f20\u5165\u7684\u591a\u4e2a\u4f4d\u7f6e\u53c2\u6570\u6253\u5305\u4e3a\u4e00\u4e2a\u5143\u7ec4\uff0c\u800c <code>**kwargs<\/code> \u5219\u7528\u4e8e\u63a5\u6536\u4efb\u610f\u5173\u952e\u5b57\u53c2\u6570\uff0c\u8f6c\u6362\u4e3a\u5b57\u5178\uff1a<\/p>\n<pre><code class=\"language-python\">def print_info(**kwargs):\r\n    for k, v in kwargs.items():\r\n        print(f\"{k}: {v}\")\r\n\r\nprint_info(name=\"Alice\", age=30, city=\"HK\")\r\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u65b9\u5f0f\u5728\u4e91\u670d\u52a1\u5668\u7ba1\u7406\u3001API\u7f51\u5173\u3001\u65e5\u5fd7\u91c7\u96c6\u6a21\u5757\u4e2d\u5c24\u4e3a\u5e38\u89c1\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u90e8\u7f72\u5728\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u4e0a\u7684\u5fae\u670d\u52a1\u7ec4\u4ef6\u3002<\/p>\n<hr \/>\n<h2>\u4e8c\u3001\u7ed3\u5408\u4f7f\u7528<code>*args<\/code>\u4e0e<code>**kwargs<\/code>\uff1a\u6784\u5efa\u901a\u7528\u63a5\u53e3\u51fd\u6570<\/h2>\n<pre><code class=\"language-python\">def complex_function(name, *args, **kwargs):\r\n    print(f\"\u59d3\u540d: {name}\")\r\n    print(f\"\u4f4d\u7f6e\u53c2\u6570: {args}\")\r\n    print(f\"\u5173\u952e\u5b57\u53c2\u6570: {kwargs}\")\r\n\r\ncomplex_function(\"\u5f20\u4e09\", 1, 2, job=\"\u5f00\u53d1\", city=\"\u9999\u6e2f\")\r\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u51fd\u6570\u5f62\u5f0f\u5728\u6784\u5efa\u901a\u7528\u5de5\u5177\u5e93\u3001\u63d2\u4ef6\u673a\u5236\u548c\u4e2d\u95f4\u4ef6\u670d\u52a1\u65f6\u975e\u5e38\u5b9e\u7528\uff0c\u63a8\u8350\u914d\u5408<a href=\"https:\/\/server.hk\/\">\u9999\u6e2f\u72ec\u7acb\u670d\u52a1\u5668<\/a>\u90e8\u7f72\u53ef\u6269\u5c55\u7684\u540e\u7aef\u903b\u8f91\u6a21\u5757\u3002<\/p>\n<hr \/>\n<h2>\u4e09\u3001\u5e8f\u5217\u4e0e\u5b57\u5178\u89e3\u5305\uff1a\u53c2\u6570\u4f20\u9012\u66f4\u52a0\u4f18\u96c5\u9ad8\u6548<\/h2>\n<p>\u5728\u51fd\u6570\u8c03\u7528\u65f6\uff0c\u82e5\u53c2\u6570\u4ee5\u5217\u8868\u3001\u5143\u7ec4\u6216\u5b57\u5178\u5f62\u5f0f\u5b58\u5728\uff0c\u53ef\u4ee5\u4f7f\u7528\u89e3\u5305\u8bed\u6cd5\uff1a<\/p>\n<pre><code class=\"language-python\">def add(a, b, c):\r\n    return a + b + c\r\n\r\nnumbers = [1, 2, 3]\r\nprint(add(*numbers))  # \u8f93\u51fa: 6\r\n<\/code><\/pre>\n<pre><code class=\"language-python\">def create_profile(name, age, city):\r\n    return f\"{name}\uff0c{age}\u5c81\uff0c\u5c45\u4f4f\u4e8e{city}\"\r\n\r\ndata = {\"name\": \"\u674e\u56db\", \"age\": 35, \"city\": \"\u9999\u6e2f\"}\r\nprint(create_profile(**data))  # \u8f93\u51fa: \u674e\u56db\uff0c35\u5c81\uff0c\u5c45\u4f4f\u4e8e\u9999\u6e2f\r\n<\/code><\/pre>\n<p>\u8fd9\u4e00\u6280\u5de7\u5e38\u7528\u4e8e\u914d\u7f6e\u8bfb\u53d6\u3001API\u53c2\u6570\u5904\u7406\uff0c\u9002\u5408\u90e8\u7f72\u5728\u652f\u6301Python\u73af\u5883\u7684\u9999\u6e2fVPS\u4e2d\u5904\u7406\u5927\u6279\u91cf\u7528\u6237\u6570\u636e\u6216\u7b2c\u4e09\u65b9\u63a5\u53e3\u56de\u8c03\u3002<\/p>\n<hr \/>\n<h2>\u56db\u3001\u7406\u89e3Python\u4e2d\u7684<code>None<\/code>\uff1a\u7a7a\u503c\u5e76\u975e\u201c\u65e0\u7528\u201d<\/h2>\n<p><code>None<\/code> \u662f Python \u4e2d\u7684\u91cd\u8981\u5185\u7f6e\u5e38\u91cf\uff0c\u8868\u793a\u201c\u7a7a\u201d\u6216\u201c\u65e0\u7ed3\u679c\u201d\u3002\u5b83\u5728\u51fd\u6570\u8bbe\u8ba1\u4e0e\u72b6\u6001\u5224\u65ad\u4e2d\u53d1\u6325\u7740\u91cd\u8981\u4f5c\u7528\uff1a<\/p>\n<ul>\n<li><strong>\u51fd\u6570\u9ed8\u8ba4\u8fd4\u56de\u503c\u4e3a None<\/strong><\/li>\n<li><strong>\u7528\u4f5c\u672a\u521d\u59cb\u5316\u53d8\u91cf\u7684\u9ed8\u8ba4\u503c<\/strong><\/li>\n<li><strong>\u4f5c\u4e3a\u51fd\u6570\u53c2\u6570\u7684\u9ed8\u8ba4\u53c2\u6570\u503c<\/strong><\/li>\n<\/ul>\n<pre><code class=\"language-python\">def get_data(cache=None):\r\n    if cache is None:\r\n        cache = {}\r\n    # \u5904\u7406\u903b\u8f91\u7565\r\n    return cache\r\n<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u5224\u65ad\u53d8\u91cf\u662f\u5426\u4e3a <code>None<\/code>\uff0c\u63a8\u8350\u4f7f\u7528 <code>is<\/code> \u8fd0\u7b97\u7b26\uff1a<\/p>\n<pre><code class=\"language-python\">x = None\r\nif x is None:\r\n    print(\"\u53d8\u91cf\u4e3a\u7a7a\")\r\n<\/code><\/pre>\n<p>\u5728\u81ea\u52a8\u5316\u811a\u672c\u3001\u4efb\u52a1\u8c03\u5ea6\u670d\u52a1\uff08\u5982Celery\uff09\u3001\u5f02\u6b65\u4efb\u52a1\u7cfb\u7edf\u4e2d\uff0c\u5408\u7406\u4f7f\u7528 <code>None<\/code> \u80fd\u663e\u8457\u964d\u4f4e\u4ee3\u7801\u590d\u6742\u5ea6\u5e76\u63d0\u5347\u5bb9\u9519\u80fd\u529b\u3002<\/p>\n<hr \/>\n<h2>\u4e94\u3001\u5b9e\u9645\u5e94\u7528\u6848\u4f8b\uff1a\u88c5\u9970\u5668\u4e0e\u7f13\u5b58\u4f18\u5316<\/h2>\n<pre><code class=\"language-python\">def my_decorator(func):\r\n    def wrapper(*args, **kwargs):\r\n        print(\"\u5f00\u59cb\u6267\u884c\")\r\n        result = func(*args, **kwargs)\r\n        print(\"\u6267\u884c\u7ed3\u675f\")\r\n        return result\r\n    return wrapper\r\n\r\n@my_decorator\r\ndef greet(name):\r\n    print(f\"\u4f60\u597d\uff0c{name}\uff01\")\r\n\r\ngreet(\"\u6280\u672f\u8fbe\u4eba\")\r\n<\/code><\/pre>\n<p>\u88c5\u9970\u5668\u662f\u6784\u5efa\u65e5\u5fd7\u8bb0\u5f55\u3001\u5b89\u5168\u68c0\u67e5\u3001\u6027\u80fd\u5206\u6790\u7b49\u529f\u80fd\u6a21\u5757\u7684\u57fa\u7840\u8bbe\u65bd\u3002\u4f7f\u7528\u9999\u6e2fVPS\u90e8\u7f72\u8fd9\u6837\u7684Python\u670d\u52a1\uff0c\u80fd\u591f\u5b9e\u73b0\u66f4\u4f4e\u5ef6\u8fdf\u7684\u8bbf\u95ee\u4f53\u9a8c\u3002<\/p>\n<hr \/>\n<h2>\u516d\u3001\u9009\u62e9\u7a33\u5b9a\u9ad8\u901f\u7684\u670d\u52a1\u5668\u8fd0\u884cPython\u5e94\u7528<\/h2>\n<p>\u82e5\u60a8\u8ba1\u5212\u5728\u4e2d\u56fd\u5927\u9646\u53ca\u4e9a\u592a\u5730\u533a\u90e8\u7f72Python\u5e94\u7528\u7a0b\u5e8f\uff0c\u6211\u4eec\u63a8\u8350\u4f7f\u7528<a href=\"https:\/\/server.hk\/\">\u9999\u6e2f\u670d\u52a1\u5668\u4ea7\u54c1<\/a>\u3002\u5176\u5177\u5907\u4ee5\u4e0b\u4f18\u52bf\uff1a<\/p>\n<ul>\n<li>\u63a5\u5165\u5168\u7403\u7f51\u7edc\u8282\u70b9\uff0c\u9002\u5408\u8de8\u5883\u6570\u636e\u4ea4\u4e92<\/li>\n<li>\u652f\u6301\u5f39\u6027\u6269\u5c55\uff0c\u6ee1\u8db3\u9ad8\u5e76\u53d1\u5e94\u7528\u9700\u6c42<\/li>\n<li>\u9999\u6e2fVPS\u652f\u6301\u6309\u9700\u914d\u7f6e\uff0c\u9002\u5408\u4e2a\u4eba\u548c\u4f01\u4e1a\u5f00\u53d1\u8005<\/li>\n<li>\u63d0\u4f9b\u7a33\u5b9a\u8fd0\u884c\u73af\u5883\uff0c\u4fdd\u969c\u9879\u76ee\u957f\u65f6\u95f4\u5728\u7ebf<\/li>\n<\/ul>\n<p>\u65e0\u8bba\u662f\u6784\u5efaAI\u6a21\u578bAPI\u3001\u8fd0\u7ef4\u5de5\u5177\u96c6\u6210\u3001\u8fd8\u662f\u5fae\u670d\u52a1\u6846\u67b6\u90e8\u7f72\uff0c\u9999\u6e2f\u4e91\u670d\u52a1\u5668\u90fd\u662f\u7406\u60f3\u4e4b\u9009\u3002<\/p>\n<hr \/>\n<h2>\u7ed3\u8bed<\/h2>\n<p>\u901a\u8fc7\u638c\u63e1Python\u4e2d <code>*args<\/code>\u3001<code>**kwargs<\/code>\u3001\u5e8f\u5217\u89e3\u5305\u4e0e <code>None<\/code> \u7684\u7528\u6cd5\uff0c\u53ef\u4ee5\u5927\u5927\u63d0\u5347\u7a0b\u5e8f\u8bbe\u8ba1\u7684\u7075\u6d3b\u6027\u4e0e\u53ef\u7ef4\u62a4\u6027\u3002\u5c06\u8fd9\u4e9b\u6280\u672f\u4e0e\u9ad8\u6027\u80fd\u7684<a href=\"https:\/\/server.hk\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a>\u7ed3\u5408\u4f7f\u7528\uff0c\u4e0d\u4ec5\u80fd\u5b9e\u73b0\u654f\u6377\u5f00\u53d1\uff0c\u4e5f\u4e3a\u7cfb\u7edf\u8fd0\u884c\u7684\u7a33\u5b9a\u6027\u63d0\u4f9b\u4e86\u5f3a\u6709\u529b\u7684\u4fdd\u969c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u8003\u8651\u5728\u4e1c\u5357\u4e9a\u6216\u5927\u4e2d\u534e\u533a\u90e8\u7f72Python\u670d\u52a1\uff0c\u4e0d\u59a8\u9009\u62e9\u9999\u6e2f\u72ec\u7acb\u670d\u52a1\u5668\uff0c\u5feb\u901f\u5f00\u542f\u9ad8\u6548\u7f16\u7a0b\u65c5\u7a0b\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u73b0\u4ee3\u5e94\u7528\u7cfb\u7edf\u5f00\u53d1\u4e2d\uff0c\u7075\u6d3b\u6027\u548c\u53ef&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4924],"tags":[],"class_list":["post-199598","post","type-post","status-publish","format-standard","hentry","category-setup-tutorials"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199598","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=199598"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/199598\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=199598"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=199598"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=199598"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}