参数化类和元类之间有什么区别(请用Python中的代码示例)？

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

        def multiply(self, num):
            return self.value * num

    return MyClass

# 创建一个参数为2的参数化类
MyClass1 = parameterized_class(2)
obj1 = MyClass1(5)
print(obj1.multiply(3))  # 输出：30

# 创建一个参数为3的参数化类
MyClass2 = parameterized_class(3)
obj2 = MyClass2(5)
print(obj2.multiply(3))  # 输出：45

class MyMetaClass(type):
    def __new__(cls, name, bases, attrs):
        attrs['value'] = 100
        return super().__new__(cls, name, bases, attrs)

class MyClass(metaclass=MyMetaClass):
    def multiply(self, num):
        return self.value * num

obj = MyClass()
print(obj.multiply(5))  # 输出：500