Using the subprocess
library it's possible to run CMD commands within Python. In order to run powershell commands, all you'd need to do is execute C:\Windows\System32\powershell.exe and pass through the arguments.
Here's some example code to try:
import subprocess
subprocess.call('C:\Windows\System32\powershell.exe Get-Process', shell=True)
You can replace "Get-Process" with the PowerShell command you need