human
Complete this python program:
def make_derivative_operator(M, z):
assistant
#Here is the Python program you requested.

    """Create a derivative operator, to be passed to Operator.apply.
    """
    def doit(C):
        r = ((z * C.diff(z)) + (C * M))
        r = r.applyfunc(make_simp(z))
        return r
    return doit