Script to block/unblock websites using /etc/hosts

concentration.py

#!/usr/bin/python

"""
Greatest productivity script ever created. Adds whole bunch of entries to /etc/hosts
Need to manually delete it !:/
"""

import sys

lines = open('/etc/hosts').readlines()
lines = [line.strip() for line in lines]
domains = ['facebook.com', 'instagram.com',
        'news.ycombinator.com', 'twitter.com', 'wsj.com', 'seekingalpha.com',
        'reddit.com',  'snapchat.com', 'youtube.com',
        'finance.yahoo.com', 'livemint.com', 'hindustantimes.com', 'cnbc.com',
        'linkedin.com', 'robinhood.com', 'nytimes.com', 'twitch.tv', 'bloomberg.com',
        'moneycontrol.com', 'scmp.com', 'asia.nikkei.com']

print("Blocking sites")

block = ['127.0.0.1 ' + domain for domain in domains] + ['127.0.0.1 www.' + domain for domain in domains]
open('/etc/hosts', 'a').write('\n'.join(block))
print("Done")

@wagmachado , does it actually works for family for current version?, it doesn't work for me.