def setOutput(self, name=None):
     import os
     try:
         os.rename(name, name + '.bkp')
     except:
         pass
     StreamApp.setOutput(self, name)
 def setOutput(self, name=None):
     import os
     try:
         os.rename(name, name + '.bkp')   
     except: pass
     StreamApp.setOutput(self, name)