Как решить ошибку выполнения subprocess.run ()?

Question

это мой код:

import subprocess

completed = subprocess.run(['ls', '-1'])
print('returncode:', completed.returncode)

это ошибка, которую я получаю:

Traceback (most recent call last):
  File "getDataFromOpenImages_snowman.py", line 3, in <module>
    completed = subprocess.run(['ls', '-1'])
  File "C:\Users\pavan\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 489, in run
    with Popen(*popenargs, **kwargs) as process:
  File "C:\Users\pavan\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 854, in __init__
    self._execute_child(args, executable, preexec_fn, close_fds,
  File "C:\Users\pavan\AppData\Local\Programs\Python\Python38\lib\subprocess.py", line 1307, in _execute_child
    hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
FileNotFoundError: [WinError 2] The system cannot find the file specified

Вопрос: в чем проблема с моим кодом?