python extension problem (newbie)
Douglas du Boulay
ddb at crystal.uwa.edu.au
Tue Jun 1 21:57:57 EDT 1999
Hi ,
I've been trying to write a python extension in C to interface to a
Fortran program
and a class wrapper for the extension using the following code loosely
adapted from Mark Lutz's Programming Python stackmodule example.
Unfortunately whereas his example works fine, mine goes into a recursive
loop whenever an
instance is instantiated. It seems that the __getattr__ method of the
wrapper class
cannot find the getattr method of the extension library and defaults to
trying to call itself, infinitely
recursively.
Having spent about 8 hours trying to figure out why, I still have no
idea.
Help!
Thanks
Doug
>>file oograsp.py
import p2fgraspint
class Grasp:
def __init__(self, start=None):
self._base = start or p2fgraspint.Grasp()
print "doing done" # which is never executed
def __getattr__(self, name):
print "called getattr" # executed endlessly
return getattr( self._base , name)
def __setattr__(self, name, value):
return setattr(self._base, name, value)
>> file http://www.crystal.uwa.edu.au/~ddb/pyextend/p2fgraspint.c
>> file graspsub.py
#!/usr/bin/env python
import oograsp
x = oograsp.Grasp()
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