[MMTK] shelve problem

[Jaroslaw Kalinowski]

Hi,

I was trying to store MMTK objects using shelve module but it failed. I 
was doing the following (with lysozyme 102L):

   First:

import shelve, MMTK, MMTK.PDB
sd = shelve.open('L.shelve')
co = MMTK.PDB.PDBConfiguration('L.pdb').createPeptideChains()
sd['L'] = co
MMTK.save(co, 'L.pic')

   Than:

import shelve, MMTK, MMTK.PDB
print MMTK.load('L.pic')
sd = shelve.open('L.shelve')
print sd['L']

   Now, save/load worked ok, but the last instruction produced:

Traceback (most recent call last):
   File "2.py", line 6, in ?
     print sd['L']
   File "/usr/lib/python2.3/shelve.py", line 119, in __getitem__
     value = Unpickler(f).load()
   File "/usr/lib/python2.3/site-packages/MMTK/Database.py", line 385, in 
__getattr__
     return getattr(self.type, attr)
...
   File "/usr/lib/python2.3/site-packages/MMTK/Database.py", line 385, in 
__getattr__
     return getattr(self.type, attr)
RuntimeError: maximum recursion depth exceeded

What may be the source of the problem?

   Best regards,

Jaroslaw Kalinowski