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  !python {model: stock.location}: |
    main_warehouse = self.pool.get('stock.warehouse').browse(cr, uid, ref('warehouse0'), context=context)
    main_stock = main_warehouse.lot_stock_id.id
    stowar_op_ids = self.pool.get('stock.warehouse.orderpoint').search(cr, uid, [], context=context)
    self.pool.get('stock.warehouse.orderpoint').write(cr,uid,stowar_op_ids,{'location_id':main_stock}, context=context)