> On Thu, Mar 03, 2005 at 02:55:42PM -0500, Neil Schemenauer wrote:
> s = pickle.dumps(c)

In case this is useful, Python 2.4 gives a similar traceback with a
possible clue:

>>> s = pickle.dumps(c)
Traceback (most recent call last):
  File "", line 1, in ?
  File "/usr/local/lib/python2.4/pickle.py", line 1386, in dumps
    Pickler(file, protocol, bin).dump(obj)
  File "/usr/local/lib/python2.4/pickle.py", line 231, in dump
    self.save(obj)
  File "/usr/local/lib/python2.4/pickle.py", line 338, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/local/lib/python2.4/pickle.py", line 415, in save_reduce
    save(args)
  File "/usr/local/lib/python2.4/pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/local/lib/python2.4/pickle.py", line 576, in save_tuple
    save(element)
  File "/usr/local/lib/python2.4/pickle.py", line 293, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/local/lib/python2.4/pickle.py", line 760, in save_global
    raise PicklingError(
pickle.PicklingError: Can't pickle :
it's not found as _persistent.PersistentBase