只执行一次基类方法调用，而不是执行类的每个实例？

class BaseClass:
    @staticmethod
    def setup():
        print("Performing setup...")

    def common_method(self):
        print("Executing common method...")


class SubClass1(BaseClass):
    def __init__(self):
        self.setup()  # 调用基类的静态方法

    def specific_method(self):
        print("Executing specific method for SubClass1...")


class SubClass2(BaseClass):
    def __init__(self):
        self.setup()  # 调用基类的静态方法

    def specific_method(self):
        print("Executing specific method for SubClass2...")


# 调用示例
sub1 = SubClass1()
sub1.common_method()
sub1.specific_method()

sub2 = SubClass2()
sub2.common_method()
sub2.specific_method()

Performing setup...
Executing common method...
Executing specific method for SubClass1...
Performing setup...
Executing common method...
Executing specific method for SubClass2...