listexn.py

#!/usr/bin/env python

def listexns(mod):
    module = __import__(mod)
    exns = []
    for name in module.__dict__:
        if (isinstance(module.__dict__[name], Exception) or
            name.endswith('Error')):
            exns.append(name)
    for name in exns:
        print '%s.%s is an exception type' % (str(mod), name)
    return

if __name__ == '__main__':
    import sys
    if len(sys.argv) <= 1:
        print 'Give me a module name on the $PYTHONPATH!'
    print 'Looking for exception types in module: %s' % sys.argv[1]
    listexns(sys.argv[1])