Python: Returning Polynomial Function

Command:

$ cat makePoly.py 

Result:

# ax + b

def makePoly(arr):

    def fn(x):

        return sum(c*x**p for p,c in enumerate(arr))

    return fn

my_func = makePoly([6, 2])

print my_func(3) #return 12

Command:

$ python makePoly.py 

Result:

12