"""A test for AttributeError subclasses raised within __getattr__

This script raises a subclass of AttributeError in a __getattr__ method
and checks the exception caught by the caller.
"""
import sys
class DerivedAttributeError(AttributeError): pass
raisedException = None
class C:
    def __getattr__(self, name):
        global raisedException
        raisedException = DerivedAttributeError(name)
        raise DerivedAttributeError, raisedException

obj = C()
try:
    obj.xyz
except:
    eType,eValue = sys.exc_info()[:2]
    if eValue == raisedException:
        print "Caught exception is raised exception"
    else:
        print "Caught exception is different from raised exception"
        print "    Caught: class %s '%s'" % (eValue.__class__, eValue)
        print "    Raised: class %s '%s'" % (raisedException.__class__, raisedException)
else:
    print "OOps, no exception"