import sys, imp
source = """
def bar():
	print('bar method of')"""
code = compile(source, 'foo', 'exec')
module = imp.new_module('foo')
exec (code) in module.__dict__
module.bar()
sys.modules['foo'] = module
import foo
foo.bar()

File "C:\Python31\im.py", line 8, in <module>
    module.bar()
AttributeError: 'module' object has no attribute 'bar'