Python datetime comparison is incorrect in case of compare two time like: 12:00 and 11:59 -

so below example of code:

 >>> datetime import datetime  >>> future = datetime.strptime('12:00', '%i:%m')  >>> past = datetime.strptime('11:59', '%i:%m')  >>> future < past   >>> true # expected false, because '12:00' > '11:59'  >>> past_2 = datetime.strptime('11:58', '%i:%m')  >>> past < past_2  >>> false 

why datetime compare operation returns true instead of false?

%i hours twelve hour clock. unless supply or pm (%p), takes choice. 12:00 (i.e. midnight) before 11:59 am.

if use %h 24 hour clock, in 12:00 noon instead of midnight.

https://docs.python.org/2/library/datetime.html#strftime-and-strptime-behavior