gistfile1.txt

def run(simulations=1000):
	totalvalue = 0
	env1a = []
	env2a = []
	env1 = 0
	env2 = 0
	for i in range(simulations):
		envelopes = [random.randint(2,20)]
		select = random.randint(0,1)
		if select==1:
			envelopes.append(envelopes[0]/2)
		else:
			envelopes.append(envelopes[0]*2)
		# select = random.randint(0,1)
		env1 += envelopes[0]
		env1a.append(envelopes[0])
		env2a.append(envelopes[1])
		env2 += envelopes[1]
		totalvalue += envelopes[select]
	return totalvalue*1.0/simulations*1.0, totalvalue, env1, env2



""" 
In [255]: run(100)
Out[255]: (8.52, 852, 1083, 1491)

In [256]: run(100)
Out[256]: (7.45, 745, 1054, 1208)

In [257]: run(100)
Out[257]: (7.93, 793, 1116, 1290)

In [258]: run(100)
Out[258]: (7.32, 732, 993, 1226)

In [259]: run(100)
Out[259]: (8.75, 875, 1195, 1450)

In [260]: run(100)
Out[260]: (8.59, 859, 1117, 1483)

In [261]: run(100)
Out[261]: (7.23, 723, 1016, 1182)

env2 (last number) is always higher, often significantly higher
"""