Why can't I directly add attributes to any python object?

Question

I have this code:

>>> class G:
...   def __init__(self):
...     self.x = 20
...
>>> gg = G()
>>> gg.x
20
>>> gg.y = 2000         


        

Answer 1

It's written in C

http://svn.python.org/view/python/trunk/Modules/datetimemodule.c?view=markup

It doesn't seem to implement setattr.