code: def _condense(self, data):
      '''
      Condense by returning the last real value of the gauge.
      '''
      if data:
        data = filter(None,data.values())
        if data:
          return data[-1]
      return Nonf _condense(self, data):
      '''
      Condense by returning the last real value of the gauge.
      '''
      if data:
        data = filter(None,data.values())
        if data:
          return data[-1]
      return None
docs: Condense by returning the last real value of the gauge.