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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 _maybe_update_cacher(self, clear=False, verify_is_copy=True):
 """ See if we need to update our parent cacher if clear, then clear our cache. Parameters clear : boolean, default False clear the item cache verify_is_copy : boolean, default True provide is_copy checks """


        cacher = getattr(self, '_cacher', None)
        if cacher is not None:
            ref = cacher[1]()

            # we are trying to reference a dead referant, hence
            # a copy
            if ref is None:
                del self._cacher
            else:
                try:
                    ref._maybe_cache_changed(cacher[0], self)
                except Exception:
                    pass

        if verify_is_copy:
            self._check_setitem_copy(stacklevel=5, t='referant')

        if clear:
            self._clear_item_cache()