code: def set_burn_in_from_config(self, cp):
          
          try:
              bit = self.burn_in_class.from_config(cp, self)
          except ConfigParser.Error:
              bit = None
          self.set_burn_in(bit)
docs: Sets the burn in class from the given config file.
  
          If no burn-in section exists in the file, then this just set the
          burn-in class to None.