Are all python magic methods available to all objects

Question

Am I correct in assuming that an object in Python has a default implementation of all magic methods (the ones surrounded by the double underscore, such as __init__)?

Answer 1

No.

>>> object.__add__
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AttributeError: type object 'object' has no attribute '__add__'

Some of them do have default implementations, like __init__, but most of them don't.