Replace method wont work with Datetime objects and IF statements in Python

Question

I am trying to run this code:

if initial_hour_obj.hour == 8:
    print (initial_hour_obj)
    initial_hour_obj.replace(hour = 10)
    print (initial_hour_obj)

2022-03-23 08:30:00
2022-03-23 08:30:00

but the replace method wont work. If I try to print a message after the if statement to see if my datetime obj hour is equal to the integer 8, it prints my message, so the evaluation is working, and if I try the .replace() method outside of the if, it also works, any ideas why they wont work together?

thanks

Replace() returns the result of said replacing, which you arent saving anywhere. — Josip Juros
– Josip Juros, Commented Mar 23, 2022 at 9:03
Thanks, got it now, initial_hour_obj = initial_hour_obj.replace(hour = 10) would have the effect I need — Ricardo de Castro
– Ricardo de Castro, Commented Mar 23, 2022 at 9:06

aashvikt · Accepted Answer · 2022-03-23 14:35:22Z

2

When you are running replace(), it is returning the result, it is not storing the result in initial_hour_obj.

So, you have to do this:

if initial_hour_obj.hour == 8:
    print (initial_hour_obj)
    initial_hour_obj = initial_hour_obj.replace(hour = 10)
    print (initial_hour_obj)

answered Mar 23, 2022 at 14:35

aashvikt

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