I have a date string like this and then use strptime() So its like this
my_time = datetime.datetime.strptime('07/05/15', '%m/%d/%Y') and now I want to add 23 hours and 59 minutes to my_time
I have tried .timedelta but it doesn't work? How could I do this?
Add time afterwards; you can do so with the datetime.replace() method to produce a new datetime object:
my_time = datetime.datetime.strptime('07/05/15', '%m/%d/%y') my_time = my_time.replace(hour=23, minute=59) The datetime.strptime() sets the hour and minute values to the default, 0. Note that for a two-digit year (like 15) you'd use %y, not %Y, which is for a four-digit year.
You could also use the datetime.combine() class method to pair up a date and a time object:
my_time = datetime.datetime.strptime('07/05/15', '%m/%d/%y') my_time = datetime.datetime.combine(my_time.date(), datetime.time(23, 59)) If you feel you must use a timedelta(), take into account that adding it will again produce a new datetime object. You could use augmented assignment to add it 'in-place':
my_time = datetime.datetime.strptime('07/05/15', '%m/%d/%y') my_time += datetime.timedelta(hours=23, minutes=59) Demo:
>>> import datetime >>> my_time = datetime.datetime.strptime('07/05/15', '%m/%d/%y') >>> my_time.replace(hour=23, minute=59) datetime.datetime(2015, 7, 5, 23, 59) >>> datetime.datetime.combine(my_time.date(), datetime.time(23, 59)) datetime.datetime(2015, 7, 5, 23, 59) >>> my_time + datetime.timedelta(hours=23, minutes=59) datetime.datetime(2015, 7, 5, 23, 59) 
timedelta() solution would work.Firstly, based on the date string you are providing, the format seems to be wrong , you should use %y (small y) for 2 digit years, %Y (capital Y) is for 4 digit years.
Then you can add time to my_time using timedelta as follows, but the addition operation produces a new datetime object, does not change the my_time in place.
Hence, you will need to assign it back to your my_time like this -
>>> import datetime >>> my_time = datetime.datetime.strptime('07/05/15', '%m/%d/%y') >>> my_time = my_time + datetime.timedelta(hours=23,minutes=59) >>> my_time datetime.datetime(2015, 7, 5, 23, 59) 
AttributeError: type object 'datetime.datetime' has no attribute 'timedelta'. My code looks like from datetime import datetime; newTime = passedTime + datetime.timedelta()
import datetime; newTime = passedTime + datetime.timedelta(). Alexey essentially did import datetime; newTime = passedTime + datetime.datetime.timedelta() because of how he structured his import as from datetime import datetime.pandas way:
import pandas as pd df['time'] = pd.to_datetime(ddf['time']) + pd.Timedelta('16:00:00') 