Python yield generator-usage record

####交替执行task2和task1
def task1(n):
    for i in range(n):
        print("listening {}".format(i))
        yield None

def task2(n):
    for i in range(n):
        print("woking {}".format(i))
        yield None

g1=task1(5)
g2=task2(5)

while True:
    try:
        next(g1)
        next(g2)
    except Exception:
            break



# 看见 yield这个函数就是个生成器
def fun():
    n=0
    while True:
        n+=1
        yield n


g3=fun()
print(g3)#<generator object fun at 0x0000024562CC8248>
print(g3.__next__())
print(g3.__next__())
print(g3.__next__())



def gen():
    i=0
    while i<5:
        temp=yield i
        print(temp)
        i+=1
    return "no data"

g=gen()
g.send(None)
g.send("zzt")
g.send("zzt")
g.send("zzt")
g.send("zzt")
next(g)
next(g)
next(g)
next(g)
next(g)