Combining datetime (with time component) and time objects

Question

Well, I have datetime objects with information like 2013-10-01 14:15:00 and time objects like

1900-01-01 00:00:49.235000
1900-01-01 00:00:49.465000
1900-01-01 00:00:49.695000

The time objects are actually progressive increments which I'd like to add to the datetime object. As described here,

If date is a datetime object, its time components and tzinfo attributes are ignored.

I wrote the code below. How should it be updated to be able to add these time objects to the datetime object as increments?

def CombineDateTime(date_str, time_str, date_fmt, time_fmt, equipment, sample_name):

import datetime

try:
    date_obj = datetime.datetime.strptime(date_str, date_fmt)

    time_obj = datetime.datetime.strptime(time_str, time_fmt)

    return datetime.datetime.combine(date_obj.date(), time_obj.time())

except:
    return 'Error'

Output:

2013-10-01 00:00:49.235000
2013-10-01 00:00:49.465000
2013-10-01 00:00:49.695000

Expected output:

2013-10-01 14:15:49.235000
2013-10-01 14:15:49.465000
2013-10-01 14:15:49.695000

Keerthana Prabhakaran · Accepted Answer · 2017-05-17 02:52:17Z

The output that you get is because 2013-10-01 and 00:00:49.235000 to your datetime.datetime.combine() and the time present in date_obj 14:15:00 is not taken into consideration at that point!

Therefore, you have the add the date_obj timedelta to your time_obj before you combine!

date_time=date_obj.time()
time_obj += datetime.timedelta(hours=date_time.hour,minutes=date_time.minute,seconds=date_time.second,microseconds=date_time.microsecond)

That is,

def CombineDateTime(date_str, time_str, date_fmt, time_fmt, equipment, sample_name):
    import datetime
    try:
        date_obj = datetime.datetime.strptime(date_str, date_fmt)
        date_time=date_obj.time()

        time_obj = datetime.datetime.strptime(time_str, time_fmt)
        time_obj += datetime.timedelta(hours=date_time.hour,minutes=date_time.minute,seconds=date_time.second,microseconds=date_time.microsecond)

        return datetime.datetime.combine(date_obj.date(),time_obj.time())

    except Exception as e:
        #print e 
        return 'Error'

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