迭代器例子

迭代器例子
li=[1,2,3,4]
a=iter(li)       #iter（li）将列表变成迭代器，迭代器赋值给a
print(next(a))
print(next(a))
print(next(a))
print(next(a))
print(next(a))
生成器例子

def fun():
    i=0
    while i<5:
        yield'暂停'#添加yield变成一个生成器，运行到yield就结束
        i+=1
        print(i)
a=fun()
print(a)
print(next(a))
print(next(a))
print(next(a))
print(next(a))