Need to change 24:00 to 23:00 time for portion of data in Python

Question

I have data for 2018 and 2017 that uses 24:00 hour times like this:

Hour Ending         X           Y       Z
12/31/2017 24:00    11452.16    1834.87 2856.94         


        

Answer 1

I don't know how your data is structured, but just iterate through it and splice the string (if it's a string) to see if '24' shows up in the 5th to last chars to the 3rd to last char. Then add one to the date using the datetime module.

import datetime

lines = ['12/31/2017 24:00', '12/31/2017 23:00', '12/30/2017 24:00']
for line in lines:
    print('PREVIOUS : ' + line)
    # Convert a 24 hour to 0 hour
    if line[-5:-3] == '24':
        (date, time) = line.split()
        time = time[:-5] + '0' + time[-3:]
        date = datetime.datetime.strptime(date, '%m/%d/%Y') + datetime.timedelta(days=1)
        print('CHANGED  : ' + date.strftime('%m/%d/%Y') + ' ' + time)
    else:
        print('UNCHANGED: ' + line)

output:

PREVIOUS : 12/31/2017 24:00
AFTER    : 01/01/2018 0:00
PREVIOUS : 12/31/2017 23:00
UNCHANGED: 12/31/2017 23:00
PREVIOUS : 12/30/2017 24:00
AFTER    : 12/31/2017 0:00