beta_roll_out.py

from hashlib import md5
from collections import Counter


BETA_ROLL_OUT_PERSANTAGE = 10


def hash_func(key):
    return sum(map(ord, md5(key).hexdigest()))


def is_beta_enabled(user_id):
    key = "{}|beta".format(user_id)
    user_percentage = hash_func(key) % 100
    return user_percentage > 100 - BETA_ROLL_OUT_PERSANTAGE


print(is_beta_enabled(94399))
# False

print(Counter([is_beta_enabled(user_id) for user_id in range(100)]))
# Counter({False: 92, True: 8})