In Sphinx, when using sphinx.ext.autosummary, how do I exclude base class members?

Question

I am using Sphinx to document a code base docString; in python. I have code like this -

class foo(np.ndarray):
    def foo_func():
      pass

class bar(foo):
    def bar_func():
       pass

When using sphinx.ext.autosummary to document the code base, in bar, how do I prevent inherited members from foo from showing?