sle-odoo

quants = env['stock.quant'].search([])

warning = ''
for quant in quants:
    move_lines = env["stock.move.line"].search([
        ('product_id', '=', quant.product_id.id),
        ('location_id', '=', quant.location_id.id),
        ('lot_id', '=', quant.lot_id.id),
        ('package_id', '=', quant.package_id.id),
        ('owner_id', '=', quant.owner_id.id),

sle-odoo

    def _get_returnable_quantities(self, lot=None, package=None):
        """Return the `stock.move.line` of `self` still returnable.
        When computing the quantities to return, this method handles the existing returns, returns
        of returns, and so on.
        :param lot: `stock.production.lot` record to filter candidate move lines
        :param package: `stock.quant.package` record to filter candidate move lines
        :return: a dict of the quantities of `stock_move` stille returnable, indexed by
            `stock.production.lot` and `stock.quant.package`
        :rtype: dict
        """