[issue33844] Writing capital letters with csvwriter.writerow changes the csv file format

Stefan Vasilev added the comment: Ah, I see now. What a coincidence :) Thank you for explaining that! -- resolution: not a bug -> works for me ___ Python tracker <https://bugs.python.org/issu

[issue33844] Writing capital letters with csvwriter.writerow changes the csv file format

New submission from Stefan Vasilev : import csv csv.writer(open('./file.csv', 'a', newline='')).writerow(['ID', 0]) If you try to open file.csv with Excel on Windows 10 it says: The file format and extension of 'file.csv' don't match. T