import random

def math_mean(myList):
	localList = [e for e in myList if type(e) in (int, float, long)]
	if not localList: return
	return float(sum(localList)) / len(localList)

n = 100
X = []
Y = []
lancers = []
for k in range(1,n+1) :
	de = random.randint(1, 6)
	if de >= 5:
		de = 4
	elif de >= 3:
		de = 2
	lancers.append(de)
	Y.append(math_mean(lancers))
	X.append(k)
print(lancers)
print(Y)
print(X)