how to close vtkoutputwindow when coding with python-pcl

[futureflsl]

I use python-pcl showing a rabbit.pcd.but I find it can show a vtkoutputwindow,if with C++ code ,it can use
#include <vtkOutputWindow.h>
vtkOutputWindow::SetGlobalWarningDisplay(0);//不弹出vtkOutputWindow窗口

so if i use python-pcl,how to make it not show vtkOutputWindow