code: def create_indexes(self, indexes):
          
          if not isinstance(indexes, list):
              raise TypeError("indexes must be a list")
          names = []
          def gen_indexes():
              for index in indexes:
                  if not isinstance(index, IndexModel):
                      raise TypeError("%r is not an instance of "
                                      "pymongo.operations.IndexModel" % (index,))
                  document = index.document
                  names.append(document["name"])
                  yield document
          cmd = SON([('createIndexes', self.name),
                     ('indexes', list(gen_indexes()))])
          with self._socket_for_writes() as sock_info:
              self._command(
                  sock_info, cmd, read_preference=ReadPreference.PRIMARY,
                  codec_options=_UNICODE_REPLACE_CODEC_OPTIONS,
                  write_concern=self.write_concern,
                  parse_write_concern_error=True)
          return names
docs: Create one or more indexes on this collection.
  
            >>> from pymongo import IndexModel, ASCENDING, DESCENDING
            >>> index1 = IndexModel([("hello", DESCENDING),
            ...                      ("world", ASCENDING)], name="hello_world")
            >>> index2 = IndexModel([("goodbye", DESCENDING)])
            >>> db.test.create_indexes([index1, index2])
            ["hello_world", "goodbye_-1"]
  
          :Parameters:
            - `indexes`: A list of :class:`~pymongo.operations.IndexModel`
              instances.
  
          .. note:: `create_indexes` uses the `createIndexes`_ command
             introduced in MongoDB **2.6** and cannot be used with earlier
             versions.
  
          .. note:: The :attr:`~pymongo.collection.Collection.write_concern` of
             this collection is automatically applied to this operation when using
             MongoDB >= 3.4.
  
          .. versionchanged:: 3.4
             Apply this collection's write concern automatically to this operation
             when connected to MongoDB >= 3.4.
          .. versionadded:: 3.0
  
          .. _createIndexes: https://docs.mongodb.com/manual/reference/command/createIndexes/