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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 _try_to_release_dynamic_segment(self, context, migration=False):
 """Release dynamic segment if necessary If this port was the last port using a segment and the segment was allocated by this driver, it should be released """

        if migration:
            binding_levels = context.original_binding_levels
        else:
            binding_levels = context.binding_levels
        LOG.debug("_try_release_dynamic_segment: "
                  "binding_levels=%(bl)s", {'bl': binding_levels})
        if not binding_levels:
            return

        for prior_level, binding in enumerate(binding_levels[1:]):
            allocating_driver = binding_levels[prior_level].get(
                driver_api.BOUND_DRIVER)
            if allocating_driver != a_const.MECHANISM_DRV_NAME:
                continue
            bound_segment = binding.get(driver_api.BOUND_SEGMENT, {})
            segment_id = bound_segment.get('id')
            if not db_lib.segment_is_dynamic(segment_id):
                continue
            if not db_lib.segment_bound(segment_id):
                context.release_dynamic_segment(segment_id)
                LOG.debug("Released dynamic segment %(seg)s allocated "
                          "by %(drv)s", {'seg': segment_id,
                                         'drv': allocating_driver})