def make_generator(f):
    n = 1
    while True:
        yield f(n)
        n += 1


def fibonacci(n):
    if n <= 1:
        return n
    return fibonacci(n-1) + fibonacci(n-2)
 
if __name__ == "__main__":
    # a
    print("fibonacci 10 next terms")
    fib_generator = make_generator(fibonacci)
    for x in range(10):
        print(next(fib_generator))
    # b
    print("square generator")
    square_generator = make_generator(lambda x : x**2)
    for x in range(10):
      print(next(square_generator))

    print("1 generator")
    one_generator = make_generator(lambda x : 1)
    for x in range(10):
      print(next(one_generator))