period = period_obj.browse(cr, uid, line[0], context=context)
if prev_journal != journal or prev_period != period:
numero_piece += 1
year = int(period.code[3:7])
month = int(period.code[0:2])
day = calendar.monthrange(year, month)[1]
period = period_obj.browse(cr, uid, line[0], context=context)
if prev_journal != journal or prev_period != period:
numero_piece += 1
year = int(period.code[3:7])
month = int(period.code[0:2])
day = calendar.monthrange(year, month)[1]