Question

I’m using dateString = date.strftime('%Y-%m-%d %H:%M:%S.%f') on this date: 2012-06-28 16:11:17 which returns 2012-06-28 16:11:17.999771 which for some reason is unparseable by Objective-c. How can I limit the last part of the string to 3 decimal places rather than 6?

Answer 1

Use:

date.strftime('%Y-%m-%d %H:%M:%S.%f')[:-3]

This is slicing (syntax [from : to(but but not include) : step]):

>>> '123456'[:-3]
'123'
>>> '123456'[3:]
'456'
>>> '123456'[1:-1]
'2345'
>>> '123456'[::2]
'135'
>>> '123456'[::-1]
'654321'
>>> '123456'[-2::]
'56'