Python datetime weird behavior

Question

I trying this in Python. What is the difference of those:

>>> a = datetime.fromtimestamp(1373576406)
>>> a.replace(tzinfo=tzutc())
datetime.datetime(2013, 7, 12, 0, 0, 6, tzinfo=tzutc())
>>> a.strftime('%s')
'1373576406'

and

>>> datetime.fromtimestamp(1373576406).replace(tzinfo=tzutc()).strftime('%s')
'1373580006'

I don't really understand why this is happening. Shouldn't both timestamps be equal?

I tried these in both Python 3.3.2 and Python 2.7.1

Wessie · Accepted Answer · 2013-07-30 13:17:54Z

2

datetime.replace returns a new datetime instance.

In your first example you are ignoring the return value of datetime.replace and are then doing datetime.strftime on your old datetime instance.

This causes the inequality you are experiencing.

To make both examples equal you would have to edit the verbose one to look like:

>>> a = datetime.fromtimestamp(1373576406)
>>> a = a.replace(tzinfo=tzutc())
>>> a.strftime('%s')
'1373576406

answered Jul 30, 2013 at 13:17

Wessie

3,5302 gold badges15 silver badges17 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Python datetime weird behavior

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related