{"id":1161359,"date":"2025-01-13T19:15:36","date_gmt":"2025-01-13T11:15:36","guid":{"rendered":""},"modified":"2025-01-13T19:15:38","modified_gmt":"2025-01-13T11:15:38","slug":"python%e5%a6%82%e4%bd%95%e8%ae%be%e7%bd%ae%e7%b1%bb%e5%85%b1%e4%ba%ab%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/1161359.html","title":{"rendered":"Python\u5982\u4f55\u8bbe\u7f6e\u7c7b\u5171\u4eab\u53d8\u91cf"},"content":{"rendered":"

\"Python\u5982\u4f55\u8bbe\u7f6e\u7c7b\u5171\u4eab\u53d8\u91cf\"<\/p>\n

\u5728Python\u4e2d\u8bbe\u7f6e\u7c7b\u5171\u4eab\u53d8\u91cf\uff0c\u53ef\u4ee5\u901a\u8fc7\u7c7b\u53d8\u91cf<\/strong>\u6765\u5b9e\u73b0\u3002\u7c7b\u53d8\u91cf<\/strong>\u662f\u5c5e\u4e8e\u7c7b\u672c\u8eab\u7684\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u5c5e\u4e8e\u67d0\u4e2a\u7279\u5b9a\u5b9e\u4f8b\u7684\u53d8\u91cf\u3002\u6240\u6709\u5b9e\u4f8b\u90fd\u5171\u4eab\u7c7b\u53d8\u91cf\uff0c\u4fee\u6539\u7c7b\u53d8\u91cf\u4f1a\u5f71\u54cd\u6240\u6709\u5b9e\u4f8b\u3002\u4e3a\u4e86\u66f4\u597d\u5730\u7406\u89e3\uff0c\u6211\u4eec\u53ef\u4ee5\u8be6\u7ec6\u89e3\u91ca\u5176\u4e2d\u7684\u4e00\u70b9\uff1a\u901a\u8fc7\u7c7b\u540d\u76f4\u63a5\u8bbf\u95ee\u548c\u4fee\u6539\u7c7b\u53d8\u91cf\u3002<\/p>\n<\/p>\n

\u7c7b\u53d8\u91cf\u7684\u5b9a\u4e49\u548c\u8bbf\u95ee<\/h3>\n<\/p>\n

\u7c7b\u53d8\u91cf<\/strong>\u662f\u5728\u7c7b\u5b9a\u4e49\u4f53\u5185\u3001\u65b9\u6cd5\u4e4b\u5916\u5b9a\u4e49\u7684\u53d8\u91cf\u3002\u5b83\u4eec\u53ef\u4ee5\u901a\u8fc7\u7c7b\u672c\u8eab\u6216\u7c7b\u7684\u4efb\u4f55\u5b9e\u4f8b\u6765\u8bbf\u95ee\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u7b80\u5355\u7684\u793a\u4f8b\uff1a<\/p>\n<\/p>\n

class MyClass:<\/p>\n
    class_variable = 0  # \u8fd9\u662f\u4e00\u4e2a\u7c7b\u53d8\u91cf<\/p>\n
\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(MyClass.class_variable)  # \u8f93\u51fa: 0<\/p>\n
\u901a\u8fc7\u5b9e\u4f8b\u8bbf\u95ee\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
instance1 = MyClass()<\/p>\n
print(instance1.class_variable)  # \u8f93\u51fa: 0<\/p>\n
\u4fee\u6539\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
MyClass.class_variable = 10<\/p>\n
\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(MyClass.class_variable)  # \u8f93\u51fa: 10<\/p>\n
\u901a\u8fc7\u5b9e\u4f8b\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(instance1.class_variable)  # \u8f93\u51fa: 10<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u4e0a\u9762\u7684\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7c7b\u53d8\u91cfclass_variable<\/code>\uff0c\u5e76\u901a\u8fc7\u7c7b\u540d\u548c\u5b9e\u4f8b\u540d\u90fd\u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539\u5b83\u3002\u4fee\u6539\u7c7b\u53d8\u91cf\u540e\uff0c\u6240\u6709\u5b9e\u4f8b\u90fd\u4f1a\u53cd\u6620\u8fd9\u4e00\u53d8\u5316\uff0c\u56e0\u4e3a\u5b83\u4eec\u5171\u4eab\u540c\u4e00\u4e2a\u7c7b\u53d8\u91cf\u3002<\/p>\n<\/p>\n
\u5b9e\u4f8b\u53d8\u91cf\u4e0e\u7c7b\u53d8\u91cf\u7684\u533a\u522b<\/h3>\n<\/p>\n
\u5b9e\u4f8b\u53d8\u91cf<\/strong>\u662f\u5c5e\u4e8e\u5b9e\u4f8b\u7684\u53d8\u91cf\uff0c\u6bcf\u4e2a\u5b9e\u4f8b\u90fd\u6709\u81ea\u5df1\u72ec\u7acb\u7684\u4e00\u4efd\uff0c\u4e0d\u4f1a\u5171\u4eab\u3002\u4ee5\u4e0b\u662f\u5b9e\u4f8b\u53d8\u91cf\u4e0e\u7c7b\u53d8\u91cf\u7684\u5bf9\u6bd4\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
class MyClass:<\/p>\n
    class_variable = 0  # \u7c7b\u53d8\u91cf<\/p>\n
    def __init__(self, instance_variable):<\/p>\n
        self.instance_variable = instance_variable  # \u5b9e\u4f8b\u53d8\u91cf<\/p>\n
\u521b\u5efa\u4e24\u4e2a\u5b9e\u4f8b<\/strong><\/h2>\n
instance1 = MyClass(1)<\/p>\n
instance2 = MyClass(2)<\/p>\n
\u8bbf\u95ee\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(MyClass.class_variable)  # \u8f93\u51fa: 0<\/p>\n
print(instance1.class_variable)  # \u8f93\u51fa: 0<\/p>\n
print(instance2.class_variable)  # \u8f93\u51fa: 0<\/p>\n
\u8bbf\u95ee\u5b9e\u4f8b\u53d8\u91cf<\/strong><\/h2>\n
print(instance1.instance_variable)  # \u8f93\u51fa: 1<\/p>\n
print(instance2.instance_variable)  # \u8f93\u51fa: 2<\/p>\n
\u4fee\u6539\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
MyClass.class_variable = 10<\/p>\n
\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(MyClass.class_variable)  # \u8f93\u51fa: 10<\/p>\n
print(instance1.class_variable)  # \u8f93\u51fa: 10<\/p>\n
print(instance2.class_variable)  # \u8f93\u51fa: 10<\/p>\n
\u4fee\u6539\u5b9e\u4f8b\u53d8\u91cf<\/strong><\/h2>\n
instance1.instance_variable = 100<\/p>\n
\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u5b9e\u4f8b\u53d8\u91cf<\/strong><\/h2>\n
print(instance1.instance_variable)  # \u8f93\u51fa: 100<\/p>\n
print(instance2.instance_variable)  # \u8f93\u51fa: 2<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\uff0cclass_variable<\/code>\u662f\u4e00\u4e2a\u7c7b\u53d8\u91cf\uff0cinstance_variable<\/code>\u662f\u4e00\u4e2a\u5b9e\u4f8b\u53d8\u91cf\u3002\u4fee\u6539\u7c7b\u53d8\u91cf\u4f1a\u5f71\u54cd\u6240\u6709\u5b9e\u4f8b\uff0c\u4f46\u4fee\u6539\u5b9e\u4f8b\u53d8\u91cf\u53ea\u4f1a\u5f71\u54cd\u5bf9\u5e94\u7684\u5b9e\u4f8b\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u7c7b\u65b9\u6cd5\u4fee\u6539\u7c7b\u53d8\u91cf<\/h3>\n<\/p>\n
\u7c7b\u65b9\u6cd5\u662f\u4e00\u79cd\u7279\u6b8a\u7684\u65b9\u6cd5\uff0c\u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539\u7c7b\u53d8\u91cf\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a\u7c7b\u65b9\u6cd5\uff0c\u9700\u8981\u4f7f\u7528@classmethod<\/code>\u88c5\u9970\u5668\uff0c\u5e76\u5c06\u7b2c\u4e00\u4e2a\u53c2\u6570\u547d\u540d\u4e3acls<\/code>\uff0c\u8868\u793a\u7c7b\u672c\u8eab\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
class MyClass:<\/p>\n
    class_variable = 0<\/p>\n
    @classmethod<\/p>\n
    def set_class_variable(cls, value):<\/p>\n
        cls.class_variable = value<\/p>\n
\u4fee\u6539\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
MyClass.set_class_variable(20)<\/p>\n
\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(MyClass.class_variable)  # \u8f93\u51fa: 20<\/p>\n
\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b<\/strong><\/h2>\n
instance = MyClass()<\/p>\n
\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(instance.class_variable)  # \u8f93\u51fa: 20<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u7c7b\u65b9\u6cd5set_class_variable<\/code>\uff0c\u7528\u4e8e\u4fee\u6539\u7c7b\u53d8\u91cfclass_variable<\/code>\u3002\u901a\u8fc7\u7c7b\u65b9\u6cd5\u4fee\u6539\u7c7b\u53d8\u91cf\u540e\uff0c\u6240\u6709\u5b9e\u4f8b\u90fd\u4f1a\u53cd\u6620\u8fd9\u4e00\u53d8\u5316\u3002<\/p>\n<\/p>\n
\u4f7f\u7528\u9759\u6001\u65b9\u6cd5\u4e0e\u7c7b\u53d8\u91cf<\/h3>\n<\/p>\n
\u9759\u6001\u65b9\u6cd5\u662f\u4e00\u79cd\u4e0d\u9700\u8981\u8bbf\u95ee\u7c7b\u672c\u8eab\u6216\u5b9e\u4f8b\u7684\u7279\u6b8a\u65b9\u6cd5\u3002\u8981\u5b9a\u4e49\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5\uff0c\u9700\u8981\u4f7f\u7528@staticmethod<\/code>\u88c5\u9970\u5668\u3002\u867d\u7136\u9759\u6001\u65b9\u6cd5\u4e0d\u80fd\u76f4\u63a5\u4fee\u6539\u7c7b\u53d8\u91cf\uff0c\u4f46\u5b83\u4eec\u53ef\u4ee5\u8c03\u7528\u7c7b\u65b9\u6cd5\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002\u4ee5\u4e0b\u662f\u4e00\u4e2a\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
class MyClass:<\/p>\n
    class_variable = 0<\/p>\n
    @classmethod<\/p>\n
    def set_class_variable(cls, value):<\/p>\n
        cls.class_variable = value<\/p>\n
    @staticmethod<\/p>\n
    def reset_class_variable():<\/p>\n
        MyClass.set_class_variable(0)<\/p>\n
\u4fee\u6539\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
MyClass.set_class_variable(30)<\/p>\n
\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(MyClass.class_variable)  # \u8f93\u51fa: 30<\/p>\n
\u4f7f\u7528\u9759\u6001\u65b9\u6cd5\u91cd\u7f6e\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
MyClass.reset_class_variable()<\/p>\n
\u8bbf\u95ee\u91cd\u7f6e\u540e\u7684\u7c7b\u53d8\u91cf<\/strong><\/h2>\n
print(MyClass.class_variable)  # \u8f93\u51fa: 0<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5b9a\u4e49\u4e86\u4e00\u4e2a\u9759\u6001\u65b9\u6cd5reset_class_variable<\/code>\uff0c\u7528\u4e8e\u91cd\u7f6e\u7c7b\u53d8\u91cfclass_variable<\/code>\u3002\u9759\u6001\u65b9\u6cd5\u901a\u8fc7\u8c03\u7528\u7c7b\u65b9\u6cd5set_class_variable<\/code>\u6765\u5b9e\u73b0\u8fd9\u4e00\u70b9\u3002<\/p>\n<\/p>\n
\u7c7b\u53d8\u91cf\u7684\u5e94\u7528\u573a\u666f<\/h3>\n<\/p>\n
\u7c7b\u53d8\u91cf\u5728\u8bb8\u591a\u5e94\u7528\u573a\u666f\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u5c24\u5176\u662f\u9700\u8981\u5728\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\u6570\u636e\u6216\u914d\u7f6e\u65f6\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u4f7f\u7528\u7c7b\u53d8\u91cf\u6765\u8ddf\u8e2a\u7c7b\u7684\u5b9e\u4f8b\u6570\u91cf\u3001\u5171\u4eab\u914d\u7f6e\u4fe1\u606f\u6216\u7f13\u5b58\u6570\u636e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5b9e\u9645\u5e94\u7528\u793a\u4f8b\uff1a<\/p>\n<\/p>\n
\u8ddf\u8e2a\u5b9e\u4f8b\u6570\u91cf<\/h4>\n<\/p>\n
class MyClass:<\/p>\n
    instance_count = 0<\/p>\n
    def __init__(self):<\/p>\n
        MyClass.instance_count += 1<\/p>\n
    def __del__(self):<\/p>\n
        MyClass.instance_count -= 1<\/p>\n
\u521b\u5efa\u5b9e\u4f8b<\/strong><\/h2>\n
instance1 = MyClass()<\/p>\n
instance2 = MyClass()<\/p>\n
\u8bbf\u95ee\u5b9e\u4f8b\u6570\u91cf<\/strong><\/h2>\n
print(MyClass.instance_count)  # \u8f93\u51fa: 2<\/p>\n
\u5220\u9664\u5b9e\u4f8b<\/strong><\/h2>\n
del instance1<\/p>\n
\u8bbf\u95ee\u5b9e\u4f8b\u6570\u91cf<\/strong><\/h2>\n
print(MyClass.instance_count)  # \u8f93\u51fa: 1<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u7c7b\u53d8\u91cfinstance_count<\/code>\u6765\u8ddf\u8e2a\u7c7b\u7684\u5b9e\u4f8b\u6570\u91cf\u3002\u6bcf\u6b21\u521b\u5efa\u4e00\u4e2a\u5b9e\u4f8b\u65f6\uff0cinstance_count<\/code>\u52a01\uff1b\u6bcf\u6b21\u5220\u9664\u4e00\u4e2a\u5b9e\u4f8b\u65f6\uff0cinstance_count<\/code>\u51cf1\u3002<\/p>\n<\/p>\n
\u5171\u4eab\u914d\u7f6e\u4fe1\u606f<\/h4>\n<\/p>\n
class Config:<\/p>\n
    settings = {<\/p>\n
        'debug': True,<\/p>\n
        'db_host': 'localhost',<\/p>\n
        'db_port': 5432<\/p>\n
    }<\/p>\n
    @classmethod<\/p>\n
    def update_setting(cls, key, value):<\/p>\n
        cls.settings[key] = value<\/p>\n
\u8bbf\u95ee\u914d\u7f6e\u4fe1\u606f<\/strong><\/h2>\n
print(Config.settings)<\/p>\n
\u4fee\u6539\u914d\u7f6e\u4fe1\u606f<\/strong><\/h2>\n
Config.update_setting('debug', False)<\/p>\n
Config.update_setting('db_host', '192.168.1.100')<\/p>\n
\u8bbf\u95ee\u4fee\u6539\u540e\u7684\u914d\u7f6e\u4fe1\u606f<\/strong><\/h2>\n
print(Config.settings)<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u7c7b\u53d8\u91cfsettings<\/code>\u6765\u5b58\u50a8\u914d\u7f6e\u4fe1\u606f\uff0c\u5e76\u4f7f\u7528\u7c7b\u65b9\u6cd5update_setting<\/code>\u6765\u4fee\u6539\u914d\u7f6e\u4fe1\u606f\u3002\u6240\u6709\u5b9e\u4f8b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539\u8fd9\u4e9b\u914d\u7f6e\u4fe1\u606f\u3002<\/p>\n<\/p>\n
\u7f13\u5b58\u6570\u636e<\/h4>\n<\/p>\n
class DataCache:<\/p>\n
    cache = {}<\/p>\n
    @classmethod<\/p>\n
    def get_data(cls, key):<\/p>\n
        return cls.cache.get(key)<\/p>\n
    @classmethod<\/p>\n
    def set_data(cls, key, value):<\/p>\n
        cls.cache[key] = value<\/p>\n
\u7f13\u5b58\u6570\u636e<\/strong><\/h2>\n
DataCache.set_data('user_1', {'name': 'Alice', 'age': 30})<\/p>\n
\u8bbf\u95ee\u7f13\u5b58\u6570\u636e<\/strong><\/h2>\n
print(DataCache.get_data('user_1'))  # \u8f93\u51fa: {'name': 'Alice', 'age': 30}<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528\u7c7b\u53d8\u91cfcache<\/code>\u6765\u5b58\u50a8\u7f13\u5b58\u6570\u636e\uff0c\u5e76\u4f7f\u7528\u7c7b\u65b9\u6cd5get_data<\/code>\u548cset_data<\/code>\u6765\u8bbf\u95ee\u548c\u4fee\u6539\u7f13\u5b58\u6570\u636e\u3002<\/p>\n<\/p>\n
\u7ed3\u8bba<\/h3>\n<\/p>\n
\u901a\u8fc7\u4ee5\u4e0a\u5185\u5bb9\uff0c\u6211\u4eec\u4e86\u89e3\u4e86\u5982\u4f55\u5728Python\u4e2d\u8bbe\u7f6e\u7c7b\u5171\u4eab\u53d8\u91cf\uff0c\u5e76\u8be6\u7ec6\u89e3\u91ca\u4e86\u901a\u8fc7\u7c7b\u540d\u76f4\u63a5\u8bbf\u95ee\u548c\u4fee\u6539\u7c7b\u53d8\u91cf\u7684\u65b9\u6cd5\u3002\u7c7b\u53d8\u91cf\u5728\u8bb8\u591a\u5e94\u7528\u573a\u666f\u4e2d\u975e\u5e38\u6709\u7528\uff0c\u5c24\u5176\u662f\u9700\u8981\u5728\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\u6570\u636e\u6216\u914d\u7f6e\u65f6\u3002\u5e0c\u671b\u8fd9\u4e9b\u793a\u4f8b\u548c\u89e3\u91ca\u80fd\u5e2e\u52a9\u4f60\u66f4\u597d\u5730\u7406\u89e3\u548c\u4f7f\u7528\u7c7b\u53d8\u91cf\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
 \u4ec0\u4e48\u662f\u7c7b\u5171\u4eab\u53d8\u91cf\uff0c\u4e3a\u4ec0\u4e48\u5728Python\u4e2d\u9700\u8981\u5b83\u4eec\uff1f<\/strong>
\u7c7b\u5171\u4eab\u53d8\u91cf\u662f\u6307\u5728\u7c7b\u7684\u6240\u6709\u5b9e\u4f8b\u4e2d\u5171\u4eab\u7684\u53d8\u91cf\u3002\u8fd9\u610f\u5473\u7740\u6240\u6709\u5b9e\u4f8b\u90fd\u53ef\u4ee5\u8bbf\u95ee\u548c\u4fee\u6539\u8fd9\u4e2a\u53d8\u91cf\uff0c\u800c\u4e0d\u9700\u8981\u521b\u5efa\u5355\u72ec\u7684\u526f\u672c\u3002\u5728Python\u4e2d\uff0c\u7c7b\u5171\u4eab\u53d8\u91cf\u5e38\u7528\u4e8e\u5b58\u50a8\u7c7b\u7ea7\u522b\u7684\u4fe1\u606f\uff0c\u6bd4\u5982\u8ba1\u6570\u5668\u3001\u914d\u7f6e\u8bbe\u7f6e\u6216\u8005\u5176\u4ed6\u9700\u8981\u5728\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\u7684\u6570\u636e\u3002\u4f7f\u7528\u7c7b\u5171\u4eab\u53d8\u91cf\u53ef\u4ee5\u7b80\u5316\u4ee3\u7801\u7ed3\u6784\uff0c\u964d\u4f4e\u5185\u5b58\u4f7f\u7528\uff0c\u5e76\u4fdd\u6301\u6570\u636e\u4e00\u81f4\u6027\u3002<\/p>\n
\u5982\u4f55\u5728Python\u4e2d\u5b9a\u4e49\u548c\u4f7f\u7528\u7c7b\u5171\u4eab\u53d8\u91cf\uff1f<\/strong>
\u5728Python\u4e2d\uff0c\u7c7b\u5171\u4eab\u53d8\u91cf\u901a\u5e38\u5728\u7c7b\u4f53\u5185\u76f4\u63a5\u5b9a\u4e49\uff0c\u800c\u4e0d\u662f\u5728\u5b9e\u4f8b\u65b9\u6cd5\u4e2d\u3002\u53ef\u4ee5\u901a\u8fc7\u7c7b\u540d\u8bbf\u95ee\u8fd9\u4e9b\u53d8\u91cf\uff0c\u4f8b\u5982\uff1aClassName.variable_name<\/code>\u3002\u8981\u5728\u5b9e\u4f8b\u4e2d\u8bbf\u95ee\u6216\u4fee\u6539\u8fd9\u4e9b\u53d8\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528self.__class__.variable_name<\/code>\u3002\u4f8b\u5982\uff1a  <\/p>\n
class MyClass:\n    shared_var = 0  # \u7c7b\u5171\u4eab\u53d8\u91cf\n\n    def increment(self):\n        MyClass.shared_var += 1\n\nobj1 = MyClass()\nobj2 = MyClass()\nobj1.increment()\nprint(obj2.shared_var)  # \u8f93\u51fa 1\uff0c\u56e0\u4e3a\u4e24\u4e2a\u5b9e\u4f8b\u5171\u4eab\u540c\u4e00\u4e2a\u53d8\u91cf\n<\/code><\/pre>\n
\u7c7b\u5171\u4eab\u53d8\u91cf\u662f\u5426\u4f1a\u5f71\u54cd\u6bcf\u4e2a\u5b9e\u4f8b\u7684\u72ec\u7acb\u6027\uff1f<\/strong>
\u7c7b\u5171\u4eab\u53d8\u91cf\u786e\u5b9e\u4f1a\u5f71\u54cd\u5b9e\u4f8b\u7684\u72ec\u7acb\u6027\uff0c\u56e0\u4e3a\u6240\u6709\u5b9e\u4f8b\u5171\u4eab\u540c\u4e00\u4efd\u6570\u636e\u3002\u5982\u679c\u4e00\u4e2a\u5b9e\u4f8b\u4fee\u6539\u4e86\u8fd9\u4e2a\u53d8\u91cf\u7684\u503c\uff0c\u6240\u6709\u5176\u4ed6\u5b9e\u4f8b\u90fd\u4f1a\u770b\u5230\u8fd9\u4e2a\u53d8\u5316\u3002\u5982\u679c\u9700\u8981\u6bcf\u4e2a\u5b9e\u4f8b\u62e5\u6709\u81ea\u5df1\u7684\u6570\u636e\u526f\u672c\uff0c\u53ef\u4ee5\u4f7f\u7528\u5b9e\u4f8b\u53d8\u91cf\uff08\u5728__init__<\/code>\u65b9\u6cd5\u4e2d\u5b9a\u4e49\uff09\u800c\u4e0d\u662f\u7c7b\u5171\u4eab\u53d8\u91cf\u3002\u9009\u62e9\u4f7f\u7528\u7c7b\u5171\u4eab\u53d8\u91cf\u8fd8\u662f\u5b9e\u4f8b\u53d8\u91cf\u53d6\u51b3\u4e8e\u5177\u4f53\u7684\u5e94\u7528\u9700\u6c42\u548c\u8bbe\u8ba1\u76ee\u6807\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u5728Python\u4e2d\u8bbe\u7f6e\u7c7b\u5171\u4eab\u53d8\u91cf\uff0c\u53ef\u4ee5\u901a\u8fc7\u7c7b\u53d8\u91cf\u6765\u5b9e\u73b0\u3002\u7c7b\u53d8\u91cf\u662f\u5c5e\u4e8e\u7c7b\u672c\u8eab\u7684\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u5c5e\u4e8e\u67d0\u4e2a\u7279\u5b9a\u5b9e\u4f8b\u7684\u53d8\u91cf\u3002 […]","protected":false},"author":3,"featured_media":1161362,"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\/1161359"}],"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=1161359"}],"version-history":[{"count":"1","href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1161359\/revisions"}],"predecessor-version":[{"id":1161366,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/1161359\/revisions\/1161366"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/1161362"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=1161359"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=1161359"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=1161359"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}