'Create a virtual package that redirects imports (see PEP 302).'

def __init__(self, name, impmask):

    self.name = name
    self.impmask = impmask
    self.module = sys.modules.setdefault(name, imp.new_module(name))
    self.module.__dict__.update({'__file__': __file__, '__path__': [], '__all__': [], '__loader__': self})
    sys.meta_path.append(self)
