Python – How to Convert a Time String to Seconds

pythonpython-datetimetime

I need to convert time value strings given in the following format to seconds, for example:

1.'00:00:00,000' -> 0 seconds

2.'00:00:10,000' -> 10 seconds

3.'00:01:04,000' -> 64 seconds

4.'01:01:09,000' -> 3669 seconds

Do I need to use regex to do this? I tried to use the time module, but

time.strptime('00:00:00,000','%I:%M:%S')

throws:

ValueError: time data '00:00:00,000' does not match format '%I:%M:%S'

Edit:

Looks like this:

from datetime import datetime
pt = datetime.strptime(timestring,'%H:%M:%S,%f')
total_seconds = pt.second + pt.minute*60 + pt.hour*3600

gives the correct result. I was just using the wrong module.

Best Answer

import datetime
import time
x = time.strptime('00:01:00,000'.split(',')[0],'%H:%M:%S')
datetime.timedelta(hours=x.tm_hour,minutes=x.tm_min,seconds=x.tm_sec).total_seconds()
60.0

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Python – How to Convert Seconds to Hours, Minutes, and Seconds

You can use datetime.timedelta function:

>>> import datetime
>>> str(datetime.timedelta(seconds=666))
'0:11:06'

Python – How to Convert a datetime Object to Seconds

For the special date of January 1, 1970 there are multiple options.

For any other starting date you need to get the difference between the two dates in seconds. Subtracting two dates gives a timedelta object, which as of Python 2.7 has a total_seconds() function.

>>> (t-datetime.datetime(1970,1,1)).total_seconds()
1256083200.0

The starting date is usually specified in UTC, so for proper results the datetime you feed into this formula should be in UTC as well. If your datetime isn't in UTC already, you'll need to convert it before you use it, or attach a tzinfo class that has the proper offset.

As noted in the comments, if you have a tzinfo attached to your datetime then you'll need one on the starting date as well or the subtraction will fail; for the example above I would add tzinfo=pytz.utc if using Python 2 or tzinfo=timezone.utc if using Python 3.

Best Answer

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Python – How to Convert Seconds to Hours, Minutes, and Seconds

Python – How to Convert a datetime Object to Seconds

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