[Tutor] class.__repr__: 'str' object is not callable???

[pan@uchicago.edu]

Can someone tell me what the hell is happening in the
following code? 

Why __getattr__ gets called when the __repr__ is the actual
one that I called?

Why is the ['str' object is not callable] happen ??

thx in advance.

pan


>>> class aClass:
..     def __init__(self):pass
..     def __repr__(self):
..     	   return 'this is aClass'
..     def __getattr__(self, name):
..     	   print 'getting attr'       #<==== [A]
..     	   return 'returned value'
.. 
>>> 
>>> a=aClass()
>>> a
this is aClass

>>> print a
 getting attr
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
TypeError: 'str' object is not callable
>>>