def fib(limit): # initialize first two Fib numbers a,b = 0,1 # one by one yeild next Fib number while a < limit: yield a a, b = b, a+b gen_obj = fib(6) print(gen_obj) print(gen_obj.__next__()) print(gen_obj.__next__()) print(gen_obj.__next__()) print(gen_obj.__next__()) print(gen_obj.__next__()) print(gen_obj.__next__()) print("\nUsing for in loop") for i in fib(6): print(i)