code: def get_signal_level(cell):
      
  
      signal = matching_line(cell, "Signal level=")
      if signal is None:
        return ""
      signal = signal.split("=")[1].split("/")
      if len(signal) == 2:
          return str(int(round(float(signal[0]) / float(signal[1]) * 100)))
      elif len(signal) == 1:
          return signal[0].split(' ')[0]
      else:
          return ""
docs: Gets the signal level of a network / cell.
      @param string cell
          A network / cell from iwlist scan.
  
      @return string
          The signal level of the network.