in my custom model I defined the fields

time_from = fields.Datetime(string="Time From", default=datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S'))

time_to = fields.Datetime(string="Time To", default=datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S'))

tot_time = fields.Char("Time Difference", compute='_get_time')

this is my compute function

@api.depends('time_from', 'time_to')
def _get_time(self):
    t1 = datetime.datetime.strptime(self.time_from, '%Y-%m-%d %H:%M:%S')
    t2 = datetime.datetime.strptime(self.time_to, '%Y-%m-%d %H:%M:%S')
    if t2<t1:
        raise ValidationError('Time To must greater than Time From')
    time_diff = (t2-t1)
    self.tot_time = time_diff

This is success fully prints time difference. Time from and time to are mm/dd/yyyy hh:mm:ss format.

How to change this to mm/dd/yyyy hh:mm:ss format

I changed the format like this '%Y-%d-%m %H:%M:%S' .
but it is not getting correct result.
How to change the format?
is it possible to calculate time difference in this format?