def set_initializer(self, initializer, column=None):
        """Set the initializer for empty values, for a given column or all future
        columns.

        Initializer is a callable that returns a tensor given the shape and data type.

        Parameters
        ----------
        initializer : callable
            The initializer.
        column : str, optional
            The column name
        """
        if column is None:
            self._default_initializer = initializer
        else:
            self._initializers[column] = initializer
Set the initializer for empty values, for a given column or all future
        columns.

        Initializer is a callable that returns a tensor given the shape and data type.

        Parameters
        ----------
        initializer : callable
            The initializer.
        column : str, optional
            The column name
        
python/dgl/frame.py