code: def cmd_lsch(self):
          
          names = list(self.fv.get_channel_names())
          names.sort()
  
          if len(names) == 0:
              self.log("No channels")
              return
  
          res = []
          cur_ch = self.fv.get_channel_info()
          for name in names:
              if (cur_ch is not None) and (cur_ch.name == name):
                  res.append("=>%s" % (name))
              else:
                  res.append("  %s" % (name))
  
          self.log("\n".join(res))
docs: lsch
  
          List the channels, showing the current one.