#To define a particular parameter, replace the 'parameterName' inside itsm.getParameter('parameterName') with that parameter's name import ctypes import subprocess VMname = itsm.getParameter('VMname') CheckPointName = itsm.getParameter('CheckPoint') class disable_file_system_redirection(): _disable = ctypes.windll.kernel32.Wow64DisableWow64FsRedirection _revert = ctypes.windll.kernel32.Wow64RevertWow64FsRedirection def __enter__(self): self.old_value = ctypes.c_long() self.success = self._disable(ctypes.byref(self.old_value)) def __exit__(self, type, value, traceback): if self.success: self._revert(self.old_value) def ExecuteCmd(cmd): with disable_file_system_redirection(): obj = subprocess.Popen(["powershell", cmd], shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE) out, err = obj.communicate() ret = obj.returncode return out, err, ret ExecuteCmd('Set-ExecutionPolicy RemoteSigned -Force') CMD = 'Get-VMSnapshot -VMName "' + VMname + '" -Name "' + CheckPointName + '" | Remove-VMSnapshot' res = ExecuteCmd(CMD) if not res[2]: print "Specific checkpoint for specific VM has been removed" else: print res[1]