只有A = B = dict() or set() or list() or 对象，A改变，B也改变

以上这种赋值，当a变量被改动时，b变量也会跟着改动。

列表：

字典：

A = B = {}  # Both A and B refer to the same empty dictionary object
A['key'] = 'value'
print(B)  # Output: {'key': 'value'}

 集合：

A = B = set()  # Both A and B refer to the same empty set object
A.add(1)
print(B)  # Output: {1}

自定义对象：

class MyClass:
    def __init__(self, value):
        self.value = value

obj1 = MyClass(10)
obj2 = obj1  # Both obj1 and obj2 reference the same object

obj1.value = 20
print(obj2.value)  # Output: 20

当连续赋值是bool类型是，不会一起改动。

例如：hasLower = hasUpper = hasDigit = hasSpecial = False