CH5Wg1HA

1#!/usr/bin/env python3
2# -*- coding: utf-8 -*-
3"""
4Created on Thu Mar 22 15:39:44 2018
5
6@author: worksheet
7"""
8from itertools import combinations
9
10def emails_with_n_dots(string, n):
11    s = string
12    placements = [x for x in combinations(range(len(s)+n-2), r=n)]
13    valid = []
14    for order in placements:
15        bad = False
16        for index in order:
17            if index+1 in order:
18                bad = True
19                break
20        if not bad:
21            valid.append(order)
22    emails = []
23    for order in valid:
24        email = list(s)
25        [email.insert(i+1, '.') for i in order]
26        if email[-1] != '.':
27            emails.append(''.join(email) + '@gmail.com')
28    return emails
29
30if __name__=='__main__':
31	s = 'roryjhynes'
32	with open('emails.txt', 'w') as f:
33		for n in range(1, 5):
34			f.write('\n')
35			emails = emails_with_n_dots(s,n)
36			f.write('\n'.join(emails))