script.py

#!/usr/bin/python3
import subprocess

if __name__ == '__main__':
    OFFSETS = (1000000, 1999999)
    FILE_NAME = 'sid.txt'

    try:
        with open(FILE_NAME, 'r+') as f:
            data = f.read()
            sid = int(data) + 1
            f.seek(0)
            f.write(str(sid))
            # print(f'El siguiente ID es: {sid}')
    except FileNotFoundError:
        # crear el archivo
        with open(FILE_NAME, 'w') as f:
            f.write(str(OFFSETS[0]))

    subprocess.run(['cowsay', '-f', 'duck', 'ahora toca el numero ', str(sid)])