Python中关键字yield有什么作用?
Iterables
>>> mylist = [1, 2, 3]
>>> for i in mylist:
... print(i)
1
2
3Generators
>>> mygenerator = (x*x for x in range(3))
>>> for i in mygenerator:
... print(i)
0
1
4Yield
生成器的高级用法:控制迭代器的穷尽
Itertools 模块
理解迭代的内部机制
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