Django random templatetag for random integers (mainly used in cache busting)

random.py

import random

from django import template

register = template.Library()


@register.simple_tag
def random_int(a, b=None):
    '''
    Return a random integer N such that `a <= N <= b`
    If b is omitted, N is `a / 2 <= N <= a`
    '''
    if not b:
        a, b = a // 2, a
    return random.randint(a, b)