code: def parse(cls, value, default=_no_default):
          
          if isinstance(value, cls):
              return value
          elif isinstance(value, int):
              e = cls._make_value(value)
          else:
              if not value:
                  e = cls._make_value(0)
              else:
                  r = 0
                  for k in value.split(","):
                      v = cls._name_to_member.get(k, _no_default)
                      if v is _no_default:
                          if default is _no_default:
                              raise _create_invalid_value_error(cls, value)
                          else:
                              return default
                      r |= v.value
                  e = cls._make_value(r)
          if not e.is_valid():
              if default is _no_default:
                  raise _create_invalid_value_error(cls, value)
              return default
          return e
docs: Parses a flag integer or string into a Flags instance.
  
          Accepts the following types:
          - Members of this enum class. These are returned directly.
          - Integers. These are converted directly into a Flags instance with the given name.
          - Strings. The function accepts a comma-delimited list of flag names, corresponding to
            members of the enum. These are all ORed together.
  
          Examples:
  
          >>> class Car(Flags):
          ...     is_big = 1
          ...     has_wheels = 2
          >>> Car.parse(1)
          Car.is_big
          >>> Car.parse(3)
          Car.parse('has_wheels,is_big')
          >>> Car.parse('is_big,has_wheels')
          Car.parse('has_wheels,is_big')