Understanding a factorial function in python

Question

I'm trying to understand if the following Python function:

def factorial(i):
    if not hasattr(factorial, 'lstFactorial'):
        factorial.lstFactorial = [None] * 1000
    if factorial.lstFactorial[i] is None:
        iProduct = 1
        for iFactor in xrange(1, i+1):
            iProduct *= iFactor
        factorial.lstFactorial[i] = iProduct
    return factorial.lstFactorial[i]

would produce the same results as the equivalent in C#:

long factorial(long n) 
{ 
   return n <= 1 ? 1 : n * factorial(n-1);
}

for a value of 12 or less.

I know nothing about Python but have just converted some Python code to C#. This was the only function that I didn't fully understand.

Answer 1

here is main algorithm

iProduct = 1
for iFactor in xrange(1, i+1):
    iProduct *= iFactor

other code is for caching results.