从python中的面向对象函数访问变量

class MyClass:
    def __init__(self):
        self.instance_var = "This is an instance variable"
    
    def print_instance_var(self):
        print(self.instance_var)

# 创建类的实例对象
obj = MyClass()

# 访问实例变量
print(obj.instance_var)  # 输出："This is an instance variable"
obj.print_instance_var()  # 输出："This is an instance variable"

class MyClass:
    class_var = "This is a class variable"
    
    def print_class_var(self):
        print(self.__class__.class_var)

# 创建类的实例对象
obj = MyClass()

# 访问类变量
print(MyClass.class_var)  # 输出："This is a class variable"
print(obj.class_var)  # 输出："This is a class variable"
obj.print_class_var()  # 输出："This is a class variable"