code: def _generate_base_namespace_module(self, api, namespace):
          
  
          self.cur_namespace = namespace
          generate_module_header(self)
  
          if namespace.doc is not None:
              self.emit('"""')
              self.emit_raw(namespace.doc)
              self.emit('"""')
              self.emit()
  
          self.emit_raw(validators_import)
  
          # Generate import statements for all referenced namespaces.
          self._generate_imports_for_referenced_namespaces(namespace)
  
          for annotation_type in namespace.annotation_types:
              self._generate_annotation_type_class(namespace, annotation_type)
  
          for data_type in namespace.linearize_data_types():
              if isinstance(data_type, Struct):
                  self._generate_struct_class(namespace, data_type)
              elif isinstance(data_type, Union):
                  self._generate_union_class(namespace, data_type)
              else:
                  raise TypeError('Cannot handle type %r' % type(data_type))
  
          for alias in namespace.linearize_aliases():
              self._generate_alias_definition(namespace, alias)
  
          # Generate the struct->subtype tag mapping at the end so that
          # references to later-defined subtypes don't cause errors.
          for data_type in namespace.linearize_data_types():
              if is_struct_type(data_type):
                  self._generate_struct_class_reflection_attributes(
                      namespace, data_type)
                  if data_type.has_enumerated_subtypes():
                      self._generate_enumerated_subtypes_tag_mapping(
                          namespace, data_type)
              elif is_union_type(data_type):
                  self._generate_union_class_reflection_attributes(
                      namespace, data_type)
                  self._generate_union_class_symbol_creators(data_type)
  
          self._generate_routes(api.route_schema, namespace)
docs: Creates a module for the namespace. All data types and routes are
          represented as Python classes.