The operator [n:m] returns the part of the string from the "n-eth" character to the "meth" character, including the first but excluding the last.

这种操作符，会返回字符串中从第『n』个到第『m』个的字符，包含开头的第『n』个，但不包含末尾的第『m』个。

youdao

The operator [n:m] returns the part of the string from the "n-eth" character to the "meth" character, including the first but excluding the last.

这种操作符，会返回字符串中从第『n』个到第『m』个的字符，包含开头的第『n』个，但不包含末尾的第『m』个。

youdao