{"id":1000143,"date":"2024-12-27T09:47:32","date_gmt":"2024-12-27T01:47:32","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1000143.html"},"modified":"2024-12-27T09:47:35","modified_gmt":"2024-12-27T01:47:35","slug":"python-%e5%a6%82%e4%bd%95%e6%93%8d%e4%bd%9c%e7%b1%bb%e5%b1%9e%e6%80%a7","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/1000143.html","title":{"rendered":"python \u5982\u4f55\u64cd\u4f5c\u7c7b\u5c5e\u6027"},"content":{"rendered":"<p style=\"text-align:center;\" ><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/25074844\/237de4c2-d76e-49da-ba48-b909b1f0fcd8.webp\" alt=\"python \u5982\u4f55\u64cd\u4f5c\u7c7b\u5c5e\u6027\" \/><\/p>\n<p><p> <strong>\u5728Python\u4e2d\uff0c\u64cd\u4f5c\u7c7b\u5c5e\u6027\u7684\u65b9\u6cd5\u4e3b\u8981\u5305\u62ec\uff1a\u5b9a\u4e49\u7c7b\u5c5e\u6027\u3001\u8bbf\u95ee\u7c7b\u5c5e\u6027\u3001\u4fee\u6539\u7c7b\u5c5e\u6027\u3001\u5220\u9664\u7c7b\u5c5e\u6027\u3002\u5b9a\u4e49\u7c7b\u5c5e\u6027\u65f6\uff0c\u9700\u8981\u5728\u7c7b\u5185\u90e8\u76f4\u63a5\u8d4b\u503c\uff1b\u8bbf\u95ee\u7c7b\u5c5e\u6027\u53ef\u4ee5\u901a\u8fc7\u7c7b\u540d\u6216\u5b9e\u4f8b\u540d\u8bbf\u95ee\uff1b\u4fee\u6539\u7c7b\u5c5e\u6027\u901a\u5e38\u901a\u8fc7\u7c7b\u540d\u4fee\u6539\uff1b\u5220\u9664\u7c7b\u5c5e\u6027\u5219\u4f7f\u7528del\u8bed\u53e5\u3002<\/strong>\u5728Python\u4e2d\uff0c\u7c7b\u5c5e\u6027\u662f\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\u7684\uff0c\u610f\u5473\u7740\u7c7b\u7684\u6240\u6709\u5bf9\u8c61\u5b9e\u4f8b\u5bf9\u7c7b\u5c5e\u6027\u7684\u4fee\u6539\u5c06\u5f71\u54cd\u5176\u4ed6\u5bf9\u8c61\u5b9e\u4f8b\u3002\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u8be6\u7ec6\u63a2\u8ba8\u5982\u4f55\u5728Python\u4e2d\u64cd\u4f5c\u7c7b\u5c5e\u6027\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u3001\u5b9a\u4e49\u7c7b\u5c5e\u6027<\/p>\n<\/p>\n<p><p>\u5b9a\u4e49\u7c7b\u5c5e\u6027\u662f\u5728\u7c7b\u4f53\u5185\u76f4\u63a5\u8d4b\u503c\uff0c\u901a\u5e38\u5728\u7c7b\u7684\u9876\u90e8\u58f0\u660e\u3002\u7c7b\u5c5e\u6027\u5728\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\uff0c\u8fd9\u610f\u5473\u7740\u6240\u6709\u5b9e\u4f8b\u5bf9\u7c7b\u5c5e\u6027\u7684\u4fee\u6539\u5c06\u53cd\u6620\u5230\u5176\u4ed6\u5b9e\u4f8b\u4e2d\u3002\u7c7b\u5c5e\u6027\u901a\u5e38\u7528\u4e8e\u5b9a\u4e49\u7c7b\u7684\u5e38\u91cf\u6216\u5171\u4eab\u6570\u636e\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\">class MyClass:<\/p>\n<p>    class_attribute = &quot;I am a class attribute&quot;<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c<code>class_attribute<\/code> \u662f\u4e00\u4e2a\u7c7b\u5c5e\u6027\uff0c\u6240\u6709 <code>MyClass<\/code> \u7684\u5b9e\u4f8b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u5b83\u3002<\/p>\n<\/p>\n<p><p>\u4e8c\u3001\u8bbf\u95ee\u7c7b\u5c5e\u6027<\/p>\n<\/p>\n<p><p>\u8bbf\u95ee\u7c7b\u5c5e\u6027\u53ef\u4ee5\u901a\u8fc7\u7c7b\u540d\u6216\u5b9e\u4f8b\u540d\u8fdb\u884c\u3002\u7136\u800c\uff0c\u4f7f\u7528\u7c7b\u540d\u8bbf\u95ee\u7c7b\u5c5e\u6027\u662f\u66f4\u4e3a\u63a8\u8350\u7684\u65b9\u6cd5\uff0c\u56e0\u4e3a\u8fd9\u6837\u53ef\u4ee5\u66f4\u6e05\u695a\u5730\u8868\u660e\u8fd9\u662f\u4e00\u4e2a\u7c7b\u5c5e\u6027\uff0c\u800c\u4e0d\u662f\u5b9e\u4f8b\u5c5e\u6027\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee<\/p>\n<p>print(MyClass.class_attribute)<\/p>\n<h2><strong>\u901a\u8fc7\u5b9e\u4f8b\u8bbf\u95ee<\/strong><\/h2>\n<p>instance = MyClass()<\/p>\n<p>print(instance.class_attribute)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u65e0\u8bba\u662f\u901a\u8fc7\u7c7b\u540d\u8fd8\u662f\u5b9e\u4f8b\u540d\u8bbf\u95ee\uff0c\u83b7\u53d6\u5230\u7684\u90fd\u662f\u540c\u4e00\u4e2a\u7c7b\u5c5e\u6027\u7684\u503c\u3002<\/p>\n<\/p>\n<p><p>\u4e09\u3001\u4fee\u6539\u7c7b\u5c5e\u6027<\/p>\n<\/p>\n<p><p>\u4fee\u6539\u7c7b\u5c5e\u6027\u901a\u5e38\u4f7f\u7528\u7c7b\u540d\u8fdb\u884c\u3002\u8fd9\u662f\u56e0\u4e3a\u5982\u679c\u901a\u8fc7\u5b9e\u4f8b\u540d\u4fee\u6539\u7c7b\u5c5e\u6027\uff0c\u4f1a\u521b\u5efa\u4e00\u4e2a\u540c\u540d\u7684\u5b9e\u4f8b\u5c5e\u6027\uff0c\u800c\u4e0d\u4f1a\u4fee\u6539\u7c7b\u5c5e\u6027\u672c\u8eab\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u901a\u8fc7\u7c7b\u540d\u4fee\u6539\u7c7b\u5c5e\u6027<\/p>\n<p>MyClass.class_attribute = &quot;New value&quot;<\/p>\n<h2><strong>\u5c1d\u8bd5\u901a\u8fc7\u5b9e\u4f8b\u4fee\u6539\u7c7b\u5c5e\u6027\uff08\u5b9e\u9645\u4e0a\u521b\u5efa\u4e86\u5b9e\u4f8b\u5c5e\u6027\uff09<\/strong><\/h2>\n<p>instance.class_attribute = &quot;Instance value&quot;<\/p>\n<h2><strong>\u9a8c\u8bc1<\/strong><\/h2>\n<p>print(MyClass.class_attribute)  # \u8f93\u51fa: New value<\/p>\n<p>print(instance.class_attribute)  # \u8f93\u51fa: Instance value<\/p>\n<p>print(MyClass().class_attribute)  # \u8f93\u51fa: New value<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u6b64\u4f8b\u4e2d\uff0c<code>instance.class_attribute<\/code> \u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u65b0\u7684\u5b9e\u4f8b\u5c5e\u6027\uff0c\u800c\u4e0d\u662f\u4fee\u6539\u4e86\u7c7b\u5c5e\u6027\u3002<\/p>\n<\/p>\n<p><p>\u56db\u3001\u5220\u9664\u7c7b\u5c5e\u6027<\/p>\n<\/p>\n<p><p>\u5220\u9664\u7c7b\u5c5e\u6027\u53ef\u4ee5\u4f7f\u7528 <code>del<\/code> \u8bed\u53e5\uff0c\u901a\u8fc7\u7c7b\u540d\u8fdb\u884c\u5220\u9664\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5220\u9664\u7c7b\u5c5e\u6027\u4f1a\u5f71\u54cd\u6240\u6709\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n<p><pre><code class=\"language-python\"># \u5220\u9664\u7c7b\u5c5e\u6027<\/p>\n<p>del MyClass.class_attribute<\/p>\n<h2><strong>\u9a8c\u8bc1\u662f\u5426\u5220\u9664<\/strong><\/h2>\n<p>try:<\/p>\n<p>    print(MyClass.class_attribute)<\/p>\n<p>except AttributeError:<\/p>\n<p>    print(&quot;class_attribute has been deleted&quot;)<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5220\u9664\u7c7b\u5c5e\u6027\u540e\uff0c\u5c1d\u8bd5\u8bbf\u95ee\u5b83\u4f1a\u5f15\u53d1 <code>AttributeError<\/code>\u3002<\/p>\n<\/p>\n<p><p>\u4e94\u3001\u7c7b\u5c5e\u6027\u4e0e\u5b9e\u4f8b\u5c5e\u6027\u7684\u533a\u522b<\/p>\n<\/p>\n<p><p>\u7c7b\u5c5e\u6027\u548c\u5b9e\u4f8b\u5c5e\u6027\u662fPython\u4e2d\u4e24\u79cd\u4e0d\u540c\u7684\u5c5e\u6027\u7c7b\u578b\u3002\u7c7b\u5c5e\u6027\u5728\u6240\u6709\u5b9e\u4f8b\u4e2d\u5171\u4eab\uff0c\u800c\u5b9e\u4f8b\u5c5e\u6027\u53ea\u5728\u7279\u5b9a\u5b9e\u4f8b\u4e2d\u5b58\u5728\u3002<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u7c7b\u5c5e\u6027\u5171\u4eab\u6027<\/strong>\uff1a\u7c7b\u5c5e\u6027\u5b9a\u4e49\u5728\u7c7b\u7ea7\u522b\uff0c\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\u540c\u4e00\u4e2a\u5185\u5b58\u7a7a\u95f4\u3002\u56e0\u6b64\uff0c\u4fee\u6539\u7c7b\u5c5e\u6027\u4f1a\u5f71\u54cd\u6240\u6709\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u5b9e\u4f8b\u5c5e\u6027\u72ec\u7acb\u6027<\/strong>\uff1a\u5b9e\u4f8b\u5c5e\u6027\u5c5e\u4e8e\u5404\u81ea\u7684\u5b9e\u4f8b\u3002\u6bcf\u4e2a\u5b9e\u4f8b\u90fd\u6709\u81ea\u5df1\u7684\u5185\u5b58\u7a7a\u95f4\uff0c\u5b9e\u4f8b\u5c5e\u6027\u7684\u4fee\u6539\u4e0d\u4f1a\u5f71\u54cd\u5176\u4ed6\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><pre><code class=\"language-python\">class MyClass:<\/p>\n<p>    class_attribute = &quot;class&quot;<\/p>\n<p>    def __init__(self, instance_attribute):<\/p>\n<p>        self.instance_attribute = instance_attribute<\/p>\n<h2><strong>\u521b\u5efa\u5b9e\u4f8b<\/strong><\/h2>\n<p>obj1 = MyClass(&quot;instance1&quot;)<\/p>\n<p>obj2 = MyClass(&quot;instance2&quot;)<\/p>\n<h2><strong>\u4fee\u6539\u7c7b\u5c5e\u6027<\/strong><\/h2>\n<p>MyClass.class_attribute = &quot;new class&quot;<\/p>\n<p>print(obj1.class_attribute)  # \u8f93\u51fa: new class<\/p>\n<p>print(obj2.class_attribute)  # \u8f93\u51fa: new class<\/p>\n<h2><strong>\u4fee\u6539\u5b9e\u4f8b\u5c5e\u6027<\/strong><\/h2>\n<p>obj1.instance_attribute = &quot;new instance1&quot;<\/p>\n<p>print(obj1.instance_attribute)  # \u8f93\u51fa: new instance1<\/p>\n<p>print(obj2.instance_attribute)  # \u8f93\u51fa: instance2<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0c\u4fee\u6539\u7c7b\u5c5e\u6027 <code>class_attribute<\/code> \u540e\uff0c<code>obj1<\/code> \u548c <code>obj2<\/code> \u90fd\u53cd\u6620\u51fa\u65b0\u503c\uff0c\u800c\u4fee\u6539 <code>obj1<\/code> \u7684 <code>instance_attribute<\/code> \u5e76\u4e0d\u5f71\u54cd <code>obj2<\/code>\u3002<\/p>\n<\/p>\n<p><p>\u516d\u3001\u4f7f\u7528\u7c7b\u5c5e\u6027\u7684\u6700\u4f73\u5b9e\u8df5<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u5e38\u91cf\u5b9a\u4e49<\/strong>\uff1a\u7c7b\u5c5e\u6027\u5e38\u7528\u4e8e\u5b9a\u4e49\u5e38\u91cf\uff0c\u8fd9\u4e9b\u5e38\u91cf\u5728\u6240\u6709\u5b9e\u4f8b\u4e2d\u5171\u4eab\u4e14\u901a\u5e38\u4e0d\u4f1a\u6539\u53d8\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u5171\u4eab\u6570\u636e<\/strong>\uff1a\u5f53\u6570\u636e\u9700\u8981\u5728\u7c7b\u7684\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\u65f6\uff0c\u53ef\u4ee5\u4f7f\u7528\u7c7b\u5c5e\u6027\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u907f\u514d\u5b9e\u4f8b\u5c5e\u6027\u51b2\u7a81<\/strong>\uff1a\u5728\u8bbe\u8ba1\u7c7b\u65f6\uff0c\u9700\u8981\u6ce8\u610f\u7c7b\u5c5e\u6027\u548c\u5b9e\u4f8b\u5c5e\u6027\u7684\u547d\u540d\uff0c\u907f\u514d\u51b2\u7a81\u3002\u901a\u5e38\u901a\u8fc7\u547d\u540d\u7ea6\u5b9a\u6765\u533a\u5206\uff0c\u4f8b\u5982\uff0c\u7c7b\u5c5e\u6027\u4f7f\u7528\u5927\u5199\u5b57\u6bcd\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u6027\u80fd\u4f18\u5316<\/strong>\uff1a\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u7c7b\u5c5e\u6027\u53ef\u4ee5\u63d0\u9ad8\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u4eec\u4e0d\u9700\u8981\u4e3a\u6bcf\u4e2a\u5b9e\u4f8b\u5b58\u50a8\u5355\u72ec\u7684\u5c5e\u6027\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u4e03\u3001\u7c7b\u5c5e\u6027\u7684\u9ad8\u7ea7\u5e94\u7528<\/p>\n<\/p>\n<ol>\n<li><strong>\u7c7b\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5<\/strong>\uff1a\u7c7b\u65b9\u6cd5\uff08\u4f7f\u7528 <code>@classmethod<\/code> \u88c5\u9970\u5668\uff09\u53ef\u4ee5\u64cd\u4f5c\u7c7b\u5c5e\u6027\uff0c\u56e0\u4e3a\u5b83\u4eec\u63a5\u6536\u7c7b\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570\u3002\u9759\u6001\u65b9\u6cd5\uff08\u4f7f\u7528 <code>@staticmethod<\/code> \u88c5\u9970\u5668\uff09\u4e0d\u4f9d\u8d56\u4e8e\u5b9e\u4f8b\u6216\u7c7b\u5c5e\u6027\uff0c\u4f46\u53ef\u4ee5\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\u3002<\/li>\n<\/ol>\n<p><pre><code class=\"language-python\">class MyClass:<\/p>\n<p>    class_attribute = &quot;class&quot;<\/p>\n<p>    @classmethod<\/p>\n<p>    def get_class_attribute(cls):<\/p>\n<p>        return cls.class_attribute<\/p>\n<p>    @staticmethod<\/p>\n<p>    def static_method():<\/p>\n<p>        return &quot;This is a static method&quot;<\/p>\n<h2><strong>\u4f7f\u7528\u7c7b\u65b9\u6cd5\u8bbf\u95ee\u7c7b\u5c5e\u6027<\/strong><\/h2>\n<p>print(MyClass.get_class_attribute())  # \u8f93\u51fa: class<\/p>\n<h2><strong>\u8c03\u7528\u9759\u6001\u65b9\u6cd5<\/strong><\/h2>\n<p>print(MyClass.static_method())  # \u8f93\u51fa: This is a static method<\/p>\n<p><\/code><\/pre>\n<\/p>\n<ol start=\"2\">\n<li><strong>\u5143\u7c7b<\/strong>\uff1a\u5143\u7c7b\u662f\u521b\u5efa\u7c7b\u7684\u7c7b\uff0c\u53ef\u4ee5\u7528\u4e8e\u4fee\u6539\u7c7b\u7684\u884c\u4e3a\uff0c\u5305\u62ec\u7c7b\u5c5e\u6027\u7684\u521b\u5efa\u548c\u521d\u59cb\u5316\u3002\u5143\u7c7b\u662f\u4e00\u4e2a\u9ad8\u7ea7\u4e3b\u9898\uff0c\u901a\u5e38\u7528\u4e8e\u6846\u67b6\u6216\u5e93\u7684\u8bbe\u8ba1\u3002<\/li>\n<\/ol>\n<p><p>\u516b\u3001\u7c7b\u5c5e\u6027\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u7684\u5e94\u7528<\/p>\n<\/p>\n<p><p>\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\uff0c\u7c7b\u5c5e\u6027\u5e38\u7528\u4e8e\u4ee5\u4e0b\u573a\u666f\uff1a<\/p>\n<\/p>\n<ol>\n<li>\n<p><strong>\u914d\u7f6e\u7ba1\u7406<\/strong>\uff1a\u7c7b\u5c5e\u6027\u53ef\u4ee5\u7528\u4e8e\u5b58\u50a8\u5e94\u7528\u7a0b\u5e8f\u7684\u9ed8\u8ba4\u914d\u7f6e\u53c2\u6570\uff0c\u8fd9\u4e9b\u53c2\u6570\u5728\u5e94\u7528\u7a0b\u5e8f\u7684\u4e0d\u540c\u90e8\u5206\u4e4b\u95f4\u5171\u4eab\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u8ba1\u6570\u5668<\/strong>\uff1a\u7c7b\u5c5e\u6027\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u5bf9\u8c61\u5b9e\u4f8b\u7684\u8ba1\u6570\u5668\uff0c\u8ddf\u8e2a\u7c7b\u521b\u5efa\u4e86\u591a\u5c11\u4e2a\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u65e5\u5fd7\u8bb0\u5f55<\/strong>\uff1a\u7c7b\u5c5e\u6027\u53ef\u4ee5\u7528\u4e8e\u5b9a\u4e49\u65e5\u5fd7\u8bb0\u5f55\u5668\uff0c\u786e\u4fdd\u5728\u5e94\u7528\u7a0b\u5e8f\u7684\u6240\u6709\u5b9e\u4f8b\u4e2d\u4f7f\u7528\u76f8\u540c\u7684\u8bb0\u5f55\u5668\u3002<\/p>\n<\/p>\n<\/li>\n<li>\n<p><strong>\u8d44\u6e90\u6c60<\/strong>\uff1a\u7c7b\u5c5e\u6027\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u8d44\u6e90\u6c60\uff0c\u4f8b\u5982\u6570\u636e\u5e93\u8fde\u63a5\u6c60\u6216\u7ebf\u7a0b\u6c60\uff0c\u5141\u8bb8\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\u6709\u9650\u7684\u8d44\u6e90\u3002<\/p>\n<\/p>\n<\/li>\n<\/ol>\n<p><p>\u603b\u7ed3<\/p>\n<\/p>\n<p><p>\u5728Python\u4e2d\uff0c\u7c7b\u5c5e\u6027\u63d0\u4f9b\u4e86\u4e00\u79cd\u5728\u7c7b\u7684\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\u6570\u636e\u7684\u65b9\u6cd5\u3002\u901a\u8fc7\u6b63\u786e\u5730\u5b9a\u4e49\u3001\u8bbf\u95ee\u3001\u4fee\u6539\u548c\u5220\u9664\u7c7b\u5c5e\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u7ba1\u7406\u5171\u4eab\u6570\u636e\u548c\u5e38\u91cf\u3002\u7406\u89e3\u7c7b\u5c5e\u6027\u4e0e\u5b9e\u4f8b\u5c5e\u6027\u4e4b\u95f4\u7684\u533a\u522b\uff0c\u4ee5\u53ca\u5982\u4f55\u5728\u7c7b\u65b9\u6cd5\u548c\u9759\u6001\u65b9\u6cd5\u4e2d\u4f7f\u7528\u7c7b\u5c5e\u6027\uff0c\u5bf9\u4e8e\u5f00\u53d1\u9ad8\u6548\u3001\u53ef\u7ef4\u62a4\u7684Python\u4ee3\u7801\u81f3\u5173\u91cd\u8981\u3002\u5728\u8bbe\u8ba1\u7c7b\u65f6\uff0c\u5e94\u9075\u5faa\u6700\u4f73\u5b9e\u8df5\uff0c\u786e\u4fdd\u7c7b\u5c5e\u6027\u7684\u7528\u9014\u6e05\u6670\u3001\u6613\u4e8e\u7406\u89e3\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p> <strong>\u5982\u4f55\u5728Python\u4e2d\u5b9a\u4e49\u7c7b\u5c5e\u6027\u5e76\u8fdb\u884c\u8bbf\u95ee\uff1f<\/strong><br \/>\u5728Python\u4e2d\uff0c\u7c7b\u5c5e\u6027\u662f\u5c5e\u4e8e\u7c7b\u672c\u8eab\u7684\u5c5e\u6027\uff0c\u800c\u4e0d\u662f\u5c5e\u4e8e\u7c7b\u7684\u5b9e\u4f8b\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u5728\u7c7b\u4f53\u5185\u76f4\u63a5\u5b9a\u4e49\u53d8\u91cf\u6765\u521b\u5efa\u7c7b\u5c5e\u6027\u3002\u8981\u8bbf\u95ee\u7c7b\u5c5e\u6027\uff0c\u53ef\u4ee5\u4f7f\u7528\u7c7b\u540d\u6216\u7c7b\u7684\u5b9e\u4f8b\u3002\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a  <\/p>\n<pre><code class=\"language-python\">class MyClass:\n    class_attribute = &quot;I am a class attribute&quot;\n\n# \u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\nprint(MyClass.class_attribute)  # \u8f93\u51fa: I am a class attribute\n\n# \u901a\u8fc7\u5b9e\u4f8b\u8bbf\u95ee\ninstance = MyClass()\nprint(instance.class_attribute)  # \u8f93\u51fa: I am a class attribute\n<\/code><\/pre>\n<p><strong>\u5982\u4f55\u5728Python\u4e2d\u4fee\u6539\u7c7b\u5c5e\u6027\u7684\u503c\uff1f<\/strong><br \/>\u4fee\u6539\u7c7b\u5c5e\u6027\u7684\u503c\u53ef\u4ee5\u901a\u8fc7\u7c7b\u540d\u6216\u5b9e\u4f8b\u6765\u5b9e\u73b0\u3002\u901a\u8fc7\u7c7b\u540d\u76f4\u63a5\u4fee\u6539\u4f1a\u5f71\u54cd\u6240\u6709\u5b9e\u4f8b\uff0c\u800c\u901a\u8fc7\u5b9e\u4f8b\u4fee\u6539\u5219\u53ea\u4f1a\u5f71\u54cd\u8be5\u5b9e\u4f8b\u3002\u793a\u4f8b\u4ee3\u7801\uff1a  <\/p>\n<pre><code class=\"language-python\">class MyClass:\n    class_attribute = &quot;Initial value&quot;\n\n# \u901a\u8fc7\u7c7b\u540d\u4fee\u6539\nMyClass.class_attribute = &quot;Modified value&quot;\nprint(MyClass.class_attribute)  # \u8f93\u51fa: Modified value\n\n# \u901a\u8fc7\u5b9e\u4f8b\u4fee\u6539\ninstance = MyClass()\ninstance.class_attribute = &quot;Instance value&quot;\nprint(instance.class_attribute)  # \u8f93\u51fa: Instance value\nprint(MyClass.class_attribute)  # \u8f93\u51fa: Modified value\n<\/code><\/pre>\n<p><strong>\u7c7b\u5c5e\u6027\u4e0e\u5b9e\u4f8b\u5c5e\u6027\u7684\u533a\u522b\u662f\u4ec0\u4e48\uff1f<\/strong><br \/>\u7c7b\u5c5e\u6027\u662f\u5b9a\u4e49\u5728\u7c7b\u4f53\u5185\u7684\u53d8\u91cf\uff0c\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\u540c\u4e00\u4efd\u6570\u636e\u3002\u800c\u5b9e\u4f8b\u5c5e\u6027\u662f\u5b9a\u4e49\u5728\u5b9e\u4f8b\u4e2d\u7684\u53d8\u91cf\uff0c\u6bcf\u4e2a\u5b9e\u4f8b\u90fd\u6709\u81ea\u5df1\u7684\u72ec\u7acb\u526f\u672c\u3002\u4f7f\u7528\u7c7b\u5c5e\u6027\u65f6\uff0c\u6240\u6709\u5b9e\u4f8b\u90fd\u80fd\u8bbf\u95ee\u5230\u540c\u4e00\u6570\u636e\uff0c\u9002\u5408\u5b58\u50a8\u7c7b\u76f8\u5173\u7684\u5171\u4eab\u4fe1\u606f\u3002\u5b9e\u4f8b\u5c5e\u6027\u5219\u9002\u5408\u5b58\u50a8\u7279\u5b9a\u4e8e\u5b9e\u4f8b\u7684\u6570\u636e\u3002\u793a\u4f8b\u4ee3\u7801\u5bf9\u6bd4\uff1a  <\/p>\n<pre><code class=\"language-python\">class MyClass:\n    class_attribute = &quot;Shared value&quot;\n\n    def __init__(self, instance_value):\n        self.instance_attribute = instance_value\n\ninstance1 = MyClass(&quot;Instance 1&quot;)\ninstance2 = MyClass(&quot;Instance 2&quot;)\n\nprint(instance1.instance_attribute)  # \u8f93\u51fa: Instance 1\nprint(instance2.instance_attribute)  # \u8f93\u51fa: Instance 2\nprint(MyClass.class_attribute)  # \u8f93\u51fa: Shared value\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\uff0c\u64cd\u4f5c\u7c7b\u5c5e\u6027\u7684\u65b9\u6cd5\u4e3b\u8981\u5305\u62ec\uff1a\u5b9a\u4e49\u7c7b\u5c5e\u6027\u3001\u8bbf\u95ee\u7c7b\u5c5e\u6027\u3001\u4fee\u6539\u7c7b\u5c5e\u6027\u3001\u5220\u9664\u7c7b\u5c5e\u6027\u3002\u5b9a\u4e49\u7c7b\u5c5e\u6027\u65f6\uff0c\u9700\u8981 [&hellip;]","protected":false},"author":3,"featured_media":1000154,"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\/1000143"}],"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=1000143"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1000143\/revisions"}],"predecessor-version":[{"id":1000155,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1000143\/revisions\/1000155"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1000154"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1000143"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1000143"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1000143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}