code: def cmd_terrain(self, args):
          '''terrain command parser'''
          usage = "usage: terrain <set|status|check>"
          if len(args) == 0:
              print(usage)
              return
          if args[0] == "status":
              print("blocks_sent: %u requests_received: %u" % (
                  self.blocks_sent,
                  self.requests_received))
          elif args[0] == "set":
              self.terrain_settings.command(args[1:])
          elif args[0] == "check":
              self.cmd_terrain_check(args[1:])
          else:
              print(usagef cmd_terrain(self, args):
          '''terrain command parser'''
          usage = "usage: terrain <set|status|check>"
          if len(args) == 0:
              print(usage)
              return
          if args[0] == "status":
              print("blocks_sent: %u requests_received: %u" % (
                  self.blocks_sent,
                  self.requests_received))
          elif args[0] == "set":
              self.terrain_settings.command(args[1:])
          elif args[0] == "check":
              self.cmd_terrain_check(args[1:])
          else:
              print(usage)
docs: terrain command parser