Object wrapper class (Python recipe) by Nichita Utiu

ActiveState Code (http://code.activestate.com/recipes/577555/)

class Wrapper(object):
    '''
    Object wrapper class.
    This a wrapper for objects. It is initialiesed with the object to wrap
    and then proxies the unhandled getattribute methods to it.
    Other classes are to inherit from it.
    '''
    def __init__(self, obj):
        '''
        Wrapper constructor.
        @param obj: object to wrap
        '''
        # wrap the object
        self._wrapped_obj = obj

    def __getattr__(self, attr):
        # see if this object has attr
        # NOTE do not use hasattr, it goes into
        # infinite recurrsion
        if attr in self.__dict__:
            # this object has it
            return getattr(self, attr)
        # proxy to the wrapped object
        return getattr(self._wrapped_obj, attr)