def revert(self):
     SchemeBase.revert(self)
     self.data = open(self.fname).read()
 def __init__(self, fname, userDefined, unsaved=0):
     SchemeBase.__init__(self, fname, userDefined, unsaved=unsaved)
     if unsaved:
         self.data = ''
     else:
         self.data = open(fname).read()