Generates random permutations (non-repeating sets of integers guaranteed to hold all integers within a certain range).

permakey.py

from random import randint

from oset import oset


def k(l):
    """
    Generate a random set of non-repeating integers, containing all integers from 0 to l.
    """
    s = oset()
    while len(s) < l:
        s.add(randint(0, l-1))
    return s