python 元类

class MyClass:
    pass


print(MyClass.__class__)
print(MyClass.__bases__)
print(int.__class__)
print(int.__bases__)

　　

class MyClass:
    data = 1


instance = MyClass()

print(MyClass, instance)

MyClass = type('MyClass', (), {'data': 1})
instance = MyClass()
print(MyClass, instance)