python note 12 生成器

def order():
    lst = []
    for i in range(10000):
        lst.append("衣服"+str(i))
    return lst
ll = order()
print(ll)

def order():
    for i in range(10000):
        yield "衣服"+str(i)
g = order() # 获取生成器
mingwei = g.__next__()
print(mingwei)
#输出衣服0
zhaoyining = g.__next__()
print(zhaoyining)
#输出衣服1

def func():
    print("我是第一个段")
    a = yield 123
    print(a)
    print("石可心是第二段")
    b = yield 456
    print(b) 
    print("赵一宁是第三段")
    c = yield 789
    print(c)
    print("刘伟是最后一个段")
    yield 79  # 最后收尾一定是yield,否则会报错
g = func()
print(g.__next__())#没有上一个yield 所以不能使用send() 开头必须是__next__()
print(g.send("煎饼果子"))#赋值给a
print(g.__next__())
print(g.__next__())
#我是第一个段
#123
#煎饼果子
#石可心是第二段
#456
#None
#赵一宁是第三段
#789
#None
#刘伟是最后一个段
#79

def eat():
    print("我吃什么啊")
    a =  yield  "馒头"
    print("a=",a)
    b =  yield  "鸡蛋灌饼"
    print("b=",b)
    c =  yield  "韭菜盒子"
    print("c=",c)
    yield  "GAME OVER"
gen = eat()      # 获取生成器
ret1 = gen. __next__()
print(ret1) # 馒头
ret2 = gen.send("胡辣汤")
print(ret2)
ret3 = gen.send("狗粮")
print(ret3)
ret4 = gen.send( "猫粮")
print(ret4)
#我吃什么啊
#馒头
#a= 胡辣汤
#鸡蛋灌饼
#b= 狗粮
#韭菜盒子
#c= 猫粮
#GAME OVER

def func():
    yield 1
    yield 13
    yield 26
    yield 88
    yield 46
    yield 100
for i in func(): # for的内部一定有__next__()
    print(i)
print(list(func())) # 内部都有__next__()