human
I wrote the below code

    if (stubs_to_create is None):
        stubs_to_create = {}
    if (not isinstance(stubs_to_create, dict)):
        raise TypeError(('create_stub    must    be    passed    a    dict,    but    a    %s    was    given.' % type(stubs_to_create).__name__))
    def inner_stub_out(fn):
        @wraps(fn)
        def instance_stub_out(self, *args, **kwargs):
            for key in stubs_to_create:
                if (not (isinstance(stubs_to_create[key], tuple) or isinstance(stubs_to_create[key], list))):
                    raise TypeError(('The    values    of    the    create_stub    dict    must    be    lists    or    tuples,    but    is    a    %s.' % type(stubs_to_create[key]).__name__))
                for value in stubs_to_create[key]:
                    self.mox.StubOutWithMock(key, value)
            return fn(self, *args, **kwargs)
        return instance_stub_out
    return inner_stub_out

What's a good function header?

=====
Here's a good function header?
assistant
#Here's a good function header.

def create_stubs(stubs_to_create=None):