dynamic use of attributes

[Gribouillis]

You could simply use the common module

def en():
    import common
    common.foo = 'faen'

You can also play with

>>> class Share:
...     def __init__(self):
...         self.__dict__ = globals()
... 
>>> share = Share()
>>> share.foo = 'bar'
>>> foo
'bar'

Remember that "Simple is better than complex" (the Zen of Python)