Dynamically add Class to Modules

[callmebill at gmail.com]

I'm trying to add a class to a module at runtime.  I've seen examples
of adding a method to a class, but I haven't been able to suit it to my
needs.

As part of a testsuite, I have a main process X that searches
recursively for python test files.  Those files typically have a global
"isSupported" method, in which the file tells the test searcher "do or
do not run me", as well as the typical TestName_TestCase class, with a
testMyTest method.

For numerous and reasonable reasons, the TestName_TestCase class must
be generated at runtime (i cannot use any pre-processing scripts to
generate the testcase files).  So the external runner has to look into
each testcase file, determine if it is supported, expand out the
test-class code, and add that new class to that testcase in memory.

I hope this picture helps:


#-------- atestcase.py --------
def isSupported():
    """ do a real check"""
    return True


ThisTestName = "foo"
TestCode = \
"""
class %s_TestCase:
    def __init__( self ):
        """ do some stuff"""

    def test_%s( self ):
	""" run the test """
"""
#------------------------------------


#------- The external runner --------

(essentially)
import atestcase.py
if atestcase.isSupported():
    # Run this test

(here's what i'm trying to figure out)
#--> expand atestcase.TestCode out to include "foo"
#--> make the testcode a class
#--> add the new foo_TestCase class to
#    the atestcase module

#-------------------------------------


So:  Does anyone know how dynamically generate a class, and add it to a
"module" that is already in memory?

Thanks so much in advance.  My flu is heating up my brain pretty badly,
so please ask me if I have to clarify anything above.