max_length = [len(i) for i in start]

        line_number = 1

        try:
            for row in reader:
                line_number += 1
                print(f.name)
                print(row)
                for i in range(len(row)):
                    max_length[i] = max(len(row[i]),max_length[i])
        except _csv.Error as err:
            print("Caught exception at line number", line_number)
            raise