from IPython.parallel import Client
rc = Client()

class AClass(object):

    def __init__(self, a):
        self.a = a

    def a_method(self, b):
        return self.a + b


class BClass(AClass):

    def b_method(self, b):
        return self.a_method(b) * 2

b = BClass(3)
b.b_method(4)

rc[:]['AClass'] = AClass
rc[:]['BClass'] = BClass

%%px
b = BClass(3)
b.b_method(4)