I have a non-iterable type error. the idea is to read one line of the dps_montant, you can one or more.
I read that you can not go int or float, but I can not find how to do it.
Thank you,

class UMAJournalEvennement(models.Model):
     _name = 'uma.debour.prestation'
     _description = 'Debour & Prestation et Service Uma'
     _rec_name = 'dps_prestation'

template_id = fields.Many2one('uma.template', string="Template UMA")
dps_debour = fields.Char(string="Debour")
dps_montant = fields.Monetary(currency_field='currency_id', string="Montant")
dps_prestation = fields.Char(string="Prestation et Service")
dps_tva = fields.Char(string="TVA")
dps_montant_ht = fields.Monetary(currency_field='currency_id', string="Montant HT")
dps_montant_tva = fields.Monetary(currency_field='currency_id', string="Montant TVA")
dps_montant_ttc = fields.Monetary(currency_field='currency_id', string="Montant TTC")
test_total = fields.Monetary(currency_field='currency_id', string="Montant test", compute="compute_total")
currency_id = fields.Many2one('res.currency')

def compute_total(self):
     for rec in self:
          rec.test_total = sum(rec.dps_montant)