How to get the real label of the last character???

[sevenHsu]

Easily known that the last character can be '警', ‘学’, or alphabets+digits from GA 36-2018. But the label(image name) only marked the index of the province and alphabet+digits. How can we get the real label of the last cahracter.

[buptlj]

确实是个问题，会不会里面没有最后一个字符是“警”，“学”之类的车牌。应该把标签合并到一个list里，然后给出index。