[Python-Dev] descriptor as instance attribute

Mon Jan 9 15:32:13 CET 2012

I can't find an answer to this grovelling through get user info. on
descriptors.
Assuming desc() is a data descriptor class why are the following not the
same???
 class poop(object):
 var = desc()
and

 class poop(object):
 def __init__(self):
 self.var = desc()
In the second form the descriptor protocol for access to 'var' is
ignored. 
Would seem to not make sense to me.
jon.