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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def re_install_net_ctrl_paths(self, vrf_table):
 """Re-installs paths from NC with current BGP policy. Iterates over known paths from NC installed in `vrf4_table` and adds new path with path attributes as per current VRF configuration. """

        assert vrf_table
        for dest in vrf_table.values():
            for path in dest.known_path_list:
                if path.source is None:
                    vrf_table.insert_vrf_path(
                        nlri=path.nlri,
                        next_hop=path.nexthop,
                        gen_lbl=True
                    )
        LOG.debug('Re-installed NC paths with current policy for table %s.',
                  vrf_table)