How to change the sound volume with python ?

[snippsat]

How do I change this code so I can change the sound volume on my computer ? I use windows 7.
Now I'm not sure if I can pull it off at all. This seem very complicated :O

The library nilamo posted  should solve it.
Test controlling volume on my laptop Win-10.

from ctypes import cast, POINTER
from comtypes import CLSCTX_ALL
from pycaw.pycaw import AudioUtilities, IAudioEndpointVolume

devices = AudioUtilities.GetSpeakers()
interface = devices.Activate(
   IAudioEndpointVolume._iid_, CLSCTX_ALL, None)
volume = cast(interface, POINTER(IAudioEndpointVolume))

# Control volume
#volume.SetMasterVolumeLevel(-0.0, None) #max
#volume.SetMasterVolumeLevel(-5.0, None) #72%
volume.SetMasterVolumeLevel(-10.0, None) #51%