bias.py

from time import time
from random import random
from statistics import mean, stdev

def coin_flip(bias=0.5):
    if random() < bias:
        return 1
    else:
        return 0

def make_biased_coin(bias=None):
    if bias is None:
        bias = random()
    print(f'Bias = {bias:.3f}')
    return lambda: coin_flip(bias)