[Tutor] Converting String to Datetime

[Ed Singleton]

I seem to have a lot of questions today.  Sorry.

How can I convert a string in the format "%Y-%m-%d %H:%M:%S" into a
datetime object?

I can work out how to convert it to a time object by:

import time
timestring = "2005-09-01 12:30:09"
time_format = "%Y-%m-%d %H:%M:%S"
mytime = time.strptime(timestring,time_format)

I can't seem to work out how to convert the time object into a
datetime object...

Any help appreciated.

Thanks

Ed