如果正面，如何将power函数用于csv文件的值？

I have CSV files with n row and m columns I want to check every cell(except row and column header) if it is positive I want that value to be 2 ^ value. for small used excel but the number of rows exceeds 20k can't use it on my PC, any shell/python/perl script that can do? Thanks.I have CSV files with n row and m columns I wan