python_message.py 文件源码

def InitMessage(descriptor, cls):
  cls._decoders_by_tag = {}
  cls._extensions_by_name = {}
  cls._extensions_by_number = {}
  if (descriptor.has_options and
      descriptor.GetOptions().message_set_wire_format):
    cls._decoders_by_tag[decoder.MESSAGE_SET_ITEM_TAG] = (
        decoder.MessageSetItemDecoder(cls._extensions_by_number), None)


  for field in descriptor.fields:
    _AttachFieldHelpers(cls, field)

  _AddEnumValues(descriptor, cls)
  _AddInitMethod(descriptor, cls)
  _AddPropertiesForFields(descriptor, cls)
  _AddPropertiesForExtensions(descriptor, cls)
  _AddStaticMethods(cls)
  _AddMessageMethods(descriptor, cls)
  _AddPrivateHelperMethods(descriptor, cls)
  copyreg.pickle(cls, lambda obj: (cls, (), obj.__getstate__()))