def Fib():
    fn1, fn = 1, 0
    while True:
        yield fn
        fn1, fn = fn, fn1 + fn

f1 = Fib()
f2 = Fib()
for i in range( 10 ):
	print( next( f1 ), next( f2 ) )  # resume

# Local Variables: #
# tab-width: 4 #
# compile-command: "python3.7 Fib2.py" #
# End: #