[EDIT] I just see that you are reffering to a row, not column. Is that what you want?
I don't have any experience with pyexcel. But have you tried to use index numbers instead of column names? The error message tells you need to use integers, so I assume the indexnumber of the column should work (typically starting from 0).
I don't have any experience with pyexcel. But have you tried to use index numbers instead of column names? The error message tells you need to use integers, so I assume the indexnumber of the column should work (typically starting from 0).