for in 的问题

hyd_cn 2016-03-20 10:09:31

如果 for x in [1,3,4]
print(x) 显示是 1、3、4

但如果 for x in[1,3,4]
while n>3
print(x)
这时候只显示 1 ，for in 不是会把 list里的数据都赋值一次吗？

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vanchristin 2016-03-21

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n是哪里来的……这是两层循环，相当于print多了个判断条件

羽飞 2016-03-20

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for x in[1,3,4] # 在这里加一个print(x)可以看到确实遍历了1,3,4 while n>3 print(x)

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