problem using pickle / cPickle

[Jesse Bloom]

I keep running into a problem when I use pickle or cPickle to unpickle a 
python object I have serialized from the database.  I read the string 
for the serialized object.  Apparently I am missing an argument?  Here's 
what happens:

cPickle.loads(s)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
TypeError: __new__() takes exactly 2 arguments (1 given)

Same thing happens when I use pickle:

 >>> pickle.loads(s)
Traceback (most recent call last):
   File "<stdin>", line 1, in ?
   File "/usr/local/lib/python2.3/pickle.py", line 1394, in loads
     return Unpickler(file).load()
   File "/usr/local/lib/python2.3/pickle.py", line 872, in load
     dispatch[key](self)
   File "/usr/local/lib/python2.3/pickle.py", line 1097, in load_newobj
     obj = cls.__new__(cls, *args)
TypeError: __new__() takes exactly 2 arguments (1 given)