>>> from islambdamethod import islambdamethod

>>> islambdamethod(obj)

>>> class CLS:
    lambdamethod = lambda: None
    @classmethod
    def classmethod(cls,x): pass

    @staticmethod
    def staticmethod(x): pass

>>> islambdamethod(CLS.lambdamethod)
True

>>> islambdamethod(CLS.classmethod)
False

>>> islambdamethod(CLS.staticmethod)
False