steemit_lottery

import json, re, requests, collections
from piston.steem import Steem

def extraction(random, votes):
    tot_rshares = sum(map(int,[x['rshares'] for x in votes]))
    tickets = {}
    for vote in votes:
        tickets[vote['voter']] = float(vote['rshares'])/tot_rshares
    tot = 0
    for voter in collections.OrderedDict(sorted(tickets.items())):
        tot += tickets[voter]
        if tot > random:
            return(voter)

blockhash = json.loads((requests.get('https://blockchain.info/it/block-height/422321?format=json').text))['blocks'][0]['hash']
random = int(blockhash,16)/16.**(64-len(re.match('[0]*',blockhash).group(0)))
votes = Steem().get_content("@rodomonte/social-attack-on-steemit").active_votes

print(extraction(random, votes))