create vm using pyvbox module - python-2.7

Question

I'm using the pyvbox, the complete implementation of the virtualBox main API. In my use case i just want to write a python code in order to start and stop VMs. When i use python GUI every things works fine.But when i try to run the python code from the CMD i got this error:
echec de l'ouverture de session pour la machine 'test'
Microsoft Visual C++ Runtime Library
Runtime Error!
Program: C:\Program Files\Oracle\VirtualBox\VBoxSVC.exe
R6025
-pure virtual function call
PS:
python version 2.7.11
pyvbox 1.0.0
OS windows 8
startvm.py:
import virtualbox
vbox = virtualbox.VirtualBox()
session = virtualbox.Session()
vm = vbox.find_machine('test_vm')
progress = vm.launch_vm_process(session, 'gui', '')

Answer 1

probably you don't need any help on this anymore :D, but I write it here anyway, maybe it can be helpful to someone.
Starting and stopping a VM with the python pyvbox library is very simple:
import virtualbox
from vboxapi import VirtualBoxManager
vbox = virtualbox.VirtualBox()
session = virtualbox.Session()
# This part starts the machine:
# machine_name is a simple string containing the name of your VM. For example "ubuntu"
machine = vbox.find_machine(machine_name)
proc = machine.launch_vm_process(session, "headless")
proc.wait_for_completion(timeout=-1)
# This part stops it:
process, unused_variable = session.machine.take_snapshot("snapshot_name", "snapshot_description", False)
# False means "do not pause the machine while snapshotting"
process.wait_for_completion(timeout=-1)
session.unlock_machine()
I created a simple script to automatically snapshot my virtual machines.
GitHub:
https://github.com/Meru3m/virtualbox-snapshotter