def concat(self, axis, other, **kwargs):
        """Concatenates two objects together.

        Args:
            axis: The axis index object to join (0 for columns, 1 for index).
            other: The other_index to concat with.

        Returns:
            Concatenated objects.
        """
        return self._append_list_of_managers(other, axis, **kwargs)
Concatenates two objects together.

        Args:
            axis: The axis index object to join (0 for columns, 1 for index).
            other: The other_index to concat with.

        Returns:
            Concatenated objects.