CSV to XLSX converter with XLSXWriter

csv_to_xlsx.py

# csv_to_xlsx [filename... [filename]]
import csv
import os
import sys
import xlsxwriter

from pathlib import Path

def main(csv_filenames):
    if non_files:
        print("All files must exist: ", ", ".join(non_files), file=sys.stderr)
        sys.exit(1)

    for csv_filename in csv_filenames:
        xl_filename = f"{Path(csv_filename).parent}/{Path(csv_filename).name[:-3]}xlsx"
        try:
            os.unlink(xl_filename)
        except FileNotFoundError:
            pass

        with open(csv_filename, 'r') as csvfile:
            reader = csv.reader(csvfile)

            with xlsxwriter.Workbook(xl_filename) as workbook:
                worksheet = workbook.add_worksheet()
                for i, row in enumerate(reader):
                    worksheet.write_row(i, 0, row)        
                workbook.close()

        print(xl_filename)

if __name__ == '__main__':
    main(sys.argv[1:])