Generate all posible programs

programs.py

# This program prints all the programs that can be written in Python
# (even this very same program if you give it enough time)

import string

def generate_programs(alphabet = string.printable):
    alphabet = tuple(alphabet)
    word, m, n = [], 0, len(alphabet)
    while True:
        p = ''.join(alphabet[i] for i in word)
        try:
            compile(p, '', 'exec')
            yield p
        except SyntaxError: pass
        for j in range(m - 1, -1, -1):
            word[j] = (word[j] + 1) % n
            if word[j] != 0: break
        else: word.append(0); m += 1

for (i, p) in enumerate(generate_programs()):
    print('Program {}:\n{}'.format(i, p))