关于python切片的问题

Question

如果定义一个以空格为结尾的字符串s，如果使用s[:-1],为何字符串最后的空格没有了，请问这是为何啊？

Answer 1

s[:-1] will only slice to the penultimate element

A subsequence of

[start:stop] 中會切出 start 到 stop-1.

Answer 2

All intervals in python are closed on the left and open on the right [m,n)

Answer 3

-1 is the last element,
If you don’t want to remove the leading and trailing spaces, should you use strip()

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