datetime - how to get compare time values and difference in python

Question

i have 3 character type columns in my table has time format values i.e

while processing (in python 3.7) to in if condition i am using following statement;

t1 = '09:12' 
t2 = '09:10'
t3 = '20:00'

if datetime.strptime(t1, '%H:%M') > datetime.strptime(t2, '%H:%M'):
    print((datetime.strptime(t1, '%H:%M') - datetime.strptime(t2, '%H:%M')))
    # above prints 00:02 but i need it to be 00:12 but below statement raise error
    print((datetime.strptime(t1, '%H:%M') - datetime.strptime(t2, '%H:%M'))) + datetime.strptime(t2, '%M')

i need to ask

a) am i doing right thing to get compare above time values (string to date) or i have to compare it with strings values

b) i require difference of above subtract value with 00:12, please assist.

question from:https://stackoverflow.com/questions/65679863/how-to-get-compare-time-values-and-difference-in-python

Answer 1

what about flooring t2's minute?

from datetime import datetime

t1 = '09:12' 
t2 = '09:10'

if datetime.strptime(t1, '%H:%M') > datetime.strptime(t2, '%H:%M'):
    print(datetime.strptime(t1, '%H:%M') - datetime.strptime(t2, '%H:%M').replace(minute=0))
    
# 0:12:00