${eval("env['ss.purchase.exchange.rate'].search([('currency_id','=','USD'),('crawler_day','=',datetime.datetime(object.delivery_order_id.ATD.year,object.delivery_order_id.ATD.month,1).strftime('%Y.%m.%d'))],limit=1).rateorNone",{'env':objects.env,'object':object,'datetime':__import__('datetime')})}...