Attribute assignment to built-in object [duplicate]

Answer 1

>>> type(object)
type 'type'
>>> type(MyClass)
type 'classobj'

Here the important difference is MyClass is a user defined class object. Where you can modify your class.

object() however is a __builtin__ class object.

When you inherit from object which is your base class as well as __builtin__, you can modify only your new MyClass that you defined.