code: def cmd_help(self, args):
          '''help commands'''
          if len(args) < 1:
              self.print_usage()
              return
  
          if args[0] == "about":
              print("MAVProxy Version " + self.version + "\nOS: " + self.host + "\nPython " +  self.pythonversion)
          elif args[0] == "site":
              print("See http://dronecode.github.io/MAVProxy/ for documentation")
          else:
              self.print_usage(f cmd_help(self, args):
          '''help commands'''
          if len(args) < 1:
              self.print_usage()
              return
  
          if args[0] == "about":
              print("MAVProxy Version " + self.version + "\nOS: " + self.host + "\nPython " +  self.pythonversion)
          elif args[0] == "site":
              print("See http://dronecode.github.io/MAVProxy/ for documentation")
          else:
              self.print_usage()
docs: help commands