Get calling class

gistfile1.py

    def _getName(self):
        retmod = "Module"
        frame, module, line, function, context, index = inspect.stack()[2]
        try:
            self_argument = frame.f_code.co_varnames[0]  # this should be self
            instance = frame.f_locals[self_argument]
            retmod = instance.__class__.__name__
        except IndexError:
            retmod = inspect.getmodulename(module)
        return retmod