05-01协程yield+next

def task1():
	while True:
		print("------1------")
		yield


def task2():
	while True:
		print("------2------")
		yield
		

def main():
	t1 = task1()
	t2 = task2()
	while True:
		next(t1)
		next(t2)
	


if __name__ == "__main__":
	main()