net: can’t get screen size on Windows

New error found:

C:\>python "C:\WPy-3670\python-3.6.7.amd64\Scripts\silkaj" network

'stty' n'est pas reconnu en tant que commande interne
ou externe, un programme exécutable ou un fichier de commandes.

Traceback (most recent call last):
  File "C:\WPy-3670\python-3.6.7.amd64\Scripts\silkaj", line 13, in <module>
    manage_cmd()

  File "C:\WPy-3670\python-3.6.7.amd64\lib\site-packages\silkaj\cli_tools.py", line 148, in manage_cmd
    network_info(cli_args.contains_switches("discover"))

  File "C:\WPy-3670\python-3.6.7.amd64\lib\site-packages\silkaj\commands.py", line 148, in network_info
    rows, columns = popen("stty size", "r").read().split()

ValueError: not enough values to unpack (expected 2, got 0)