I want to load a field value (batch_course_name) into a variable ( loadthefield ) inside a create method in order to use it as a prefix to a sequence field (name). I just don't know how to do that. Can you help me?

class intrac_batches(osv.osv):

    def create(self, cr, uid, vals, context=None):
        if not vals:
            vals = {}
        if context is None:
           context = {}

         loadthefield =   what to put here to load the value of the field batch_course_name

        vals['name'] = loadthefield + self.pool.get('ir.sequence').get(cr, uid, 'intrac.batches.number')
        return super(intrac_batches, self).create(cr, uid, vals, context=context)

    _name = 'intrac.batches'
    _columns = {
        'name': fields.char('Batch Number'),

        'batch_course_name': fields.many2one('intrac.courses', 'Course'),

        '
    }
intrac_batches()