迭代协议

it = iter([1, 2, 3])
print(next(it))  # 1

生成器函数与表达式

def count_up_to(n):
   i = 1
   while i <= n:
       yield i
       i += 1

nums = list(count_up_to(5))

管道式组合

total = sum(x*x for x in range(10) if x % 2 == 0)

转载请注明：周志洋的博客 » Python实用技巧-迭代器与生成器