Regex to catch what user has put in text box

[robertkwild]

im getting this error on cmd when i run it, ive put the code in the location i have said above

im just doing a test so thats why ive put "hostname" not the actual password reset command

c:\python\password.py:48: SyntaxWarning: invalid escape sequence '\W'
  subprocess.run('C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe hostname', shell=False)
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