Python 3.9 -初始化静态变量时的传递方法

class MyClass:
    static_var = "I am a static variable"  # 静态变量初始化

    def __init__(self, instance_var):
        self.instance_var = instance_var  # 实例变量初始化

class Counter:
    count = 0  # 静态变量，用于计数

    def __init__(self):
        Counter.count += 1  # 每次实例化时增加计数

# 创建Counter类的实例
c1 = Counter()
print(Counter.count)  # 输出: 1

c2 = Counter()
print(Counter.count)  # 输出: 2

import threading

class SafeCounter:
    count = 0
    lock = threading.Lock()

    def increment(self):
        with SafeCounter.lock:
            SafeCounter.count += 1

class MyClass:
    static_var = "Static variable"

    @classmethod
    def get_static_var(cls):
        return cls.static_var

# 访问静态变量
print(MyClass.get_static_var())  # 输出: Static variable