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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 _bind_fabric(self, context, segment):
 """Allocate dynamic segments for the port Segment physnets are based on the switch to which the host is connected. """

        port_id = context.current['id']
        physnet = self._get_physnet(context)
        if not physnet:
            LOG.debug("bind_port for port %(port)s: no physical_network "
                      "found", {'port': port_id})
            return False

        next_segment = context.allocate_dynamic_segment(
            {'network_id': context.network.current['id'],
             'network_type': n_const.TYPE_VLAN,
             'physical_network': physnet})
        LOG.debug("bind_port for port %(port)s: "
                  "current_segment=%(current_seg)s, "
                  "next_segment=%(next_seg)s",
                  {'port': port_id, 'current_seg': segment,
                   'next_seg': next_segment})
        context.continue_binding(segment['id'], [next_segment])
        return True