Asking a favour

[Gribouillis]

I added two options to the script: -n NUMBER to specify the desired number of keys and -m to allow the letter M in the result

#!/usr/bin/env python3
from argparse import ArgumentParser
import itertools as itt
import os

__version__ = '0.0.2'

def iranduint():
    yield from itt.chain.from_iterable(os.urandom(1024) for k in itt.count())
iranduint = iranduint()

def irandrange(n):
    sz = n.bit_length()
    if sz > 8:
        raise ValueError('Expected value < 256, got', n)
    m = 2 ** sz
    assert((m/2) <= n < m)
    for x in iranduint:
        x %= m
        if x < n:
            yield x
            
def irandchoice(n):
    s = set()
    src = irandrange(n)
    while n:
        x = next(src)
        if x in s:
            continue
        s.add(x)
        n -= 1
        yield x

def make_key(addm):
    rotor = [x for x in range(1, 9)]
    alpha = [x for x in "ABCDEFGHIJKL"]
    if addm: alpha.append('M')
    chx = irandchoice(len(alpha))
    core = [alpha[next(chx)] for i in range(8)]
    g36 = irandrange(36)
    ring = [1 + next(g36) for i in range(8)]
    g11 = irandchoice(11)
    notchring = [1 + next(g11) for i in range(7)]
    notchring.insert(3, '')
    beta = ("A, B, B+, C, D, E, E+, F, G, G+, "
            "H, I, J, J+, K, L, M, M+ N, O, O+, "
            "P, Q, R, R+, S, T, T+, U, V, W, W+, "
            "X, Y, Z, Z+").replace(",", "").split()
    val = irandrange(len(beta))
    ringset = [beta[next(val)] for i in range(7)]
    ringset.insert(3, '')
    return rotor, core, ring, notchring, ringset

def main(cnt, addm):
    for i in range(cnt):
        print()
        for row in make_key(addm):
            print(''.join('{:<3}'.format(x) for x in row))

if __name__ == '__main__':
    parser = ArgumentParser(description="Get new keys")
    parser.add_argument('-n', help="number of keys to generate",
                        default=1, type=int)
    parser.add_argument('-m', help="add letter M",
                        action='store_true')
    ns = parser.parse_args()
    main(ns.n, ns.m)

I just posted the same request in a forum called Stackoverflow and was voted off topic in about 15 seconds

Yes, I wouldn't have answered this in SO, it's against the rules to give code this way. I do it here because I find it funny to solve this question. I hope it's not homework.