Notes for February 17, 2017
---------------------------
For time.sleep we had to import time (see
page 260 in the Companion), for random
numbers we have to import random (page 261).

random.seed(N)		Restart sequence
random.randrange(N)     0...N-1
random.randint(N1,N2)   N1...N2 inclusive
random.random()		0.0...0.9999999
random.choice(list)	element from list