Fibonacci Generator

import time

def tail(coll):
    for i, x in enumerate(coll):
        if (i != 0):
            yield x

def fib():
    yield 0
    yield 1
    for v in map(lambda x: x[0] + x[1], zip(fib(), tail(fib()))):
        yield v


for n in fib():
    print(n)
    time.sleep(1)