Python FizzBuzz

fizzbuzz.py

import sys

def is_3(n):
    if not n % 3:
        return True

def is_5(n):
    if not n % 5:
        return True

for n in range(1,101):
    if not is_3(n) and not is_5(n):
        sys.stdout.write(str(n))
    else:
        if is_3(n):
            sys.stdout.write("Fizz")
        if is_5(n):
            sys.stdout.write("Buzz")

    sys.stdout.write("\n")

#Another method

def is_3(n):
    if not n % 3:
        return True

def is_5(n):
    if not n % 5:
        return True

for n in range(1,101):
    if not is_3(n) and not is_5(n):
        print str(n),
    else:
        if is_3(n):
            print "Fizz",
        if is_5(n):
            print "Buzz",
    print #but ... yuck

An nice implementation here as well https://gist.github.com/4088324