I recently tried switching from ElementTree to cElementTree. My application parses a collection of large XML files and creates indexes based on certain attributes. This entire collection is saved as an instance of my Database class. Using ElementTree and cPickle has allowed me to save these instances and use them later.
Using cElementTree significantly reduces parse time (~50%) and memory ~(15%) but cPickle refuses to pickle the database object. I receive: TypeError: expecting string or Unicode object, NoneType found The offending line of code simple shows my invocation of cPickle, which is not helpful. Doing exactly the same thing with ElementTree works fine. It appears that the objects returned by cElementTree do not pickle correctly. Is this a know issue? I was unable to find any reports of this problem. Any info would be appreciated! Barry -- http://mail.python.org/mailman/listinfo/python-list
