生成器也是一个迭代器,通过next()函数实现按需计算下一个数据
列表生成器,使代码变得更加简洁,只记录当前的位置,只有__next__(),
(i*2 for i in range(10))
生成器(generator)
def gene(time):
a, b = 0, 1
n = 0
while n < time:
yield b
a, b = b, a + b
n = n + 1; g = gene(10)
print(g.__next__())
print(g.__next__())
print(g.__next__())
print("============================")
for i in g:
print(i)