Create a pytables index on the table
        Parameters
        ----------
        key : object (the node to index)

        Exceptions
        ----------
        raises if the node is not a table

def create_table_index(self, key, **kwargs):
        """ Create a pytables index on the table
        Parameters
        ----------
        key : object (the node to index)

        Exceptions
        ----------
        raises if the node is not a table

        """

        # version requirements
        _tables()
        s = self.get_storer(key)
        if s is None:
            return

        if not s.is_table:
            raise TypeError(
                "cannot create table index on a Fixed format store")
        s.create_index(**kwargs)