python - Functions throws error on recursing large numbers -

i'm using python 2.7.3 , have function:

def f(n):     if n == 0:         return 0     else:         return (n % 3 == 0 or n % 5 == 0) * n + f(n - 1)  f(999)

it works until f(993), not f(999). when try, infinite amount of errors keep popping out. don't it. can tell me what's wrong?

edit: answers. guess i'm better off using iteration in python.

better off using iterative:

def f(n):     s = 0     while n > 0:         s += (n%3==0 or n%5==0)*n         n -= 1     return s print f(999)

which outputs:

also 1 write sum:

def f(n):     return sum((n%3==0 or n%5==0)*n n in reversed(range(1,n+1)))

Detect