code: def find(cls, name):
          
          try:
              return cls._member_map_[name]
          except KeyError:
              for ctype in cls._member_map_.values():
                  if ctype.name == name:
                      return ctype
              raise ValueError('%s is not a valid %s' % (name, cls.__name__))
docs: Returns the NDS2 channel type corresponding to the given name