import random

def weighted_choice(choices):
	total = sum(w for c, w in choices)
	r = random.uniform(0, total)
	upto = 0
	for c, w in choices:
		if upto + w >= r:
			break
	upto += w
	if c == None:
		weighted_choice(choices)
	else:
		return c

print(weighted_choice([('Mcdonalds',100.0),('Max\'s Restaurant',40.0),('Jollibee',3.0)]))