David (dblume) wrote,
David
dblume

python : don't trust time.altzone

Ran into a little trouble with Python's time module. TZ is not set on my system. Everything works, except for time.altzone, it's not in sync with the other time methods. I'd expected altzone to be the same as the difference between my time and gmtime.
>>> import time
>>> time.tzname
('Pacific Standard Time', 'Pacific Daylight Time')
>>> time.daylight
1
>>> time.altzone # "Only use this if daylight is nonzero."
25200
>>> time.mktime(time.gmtime()) - time.mktime(time.localtime())
28800.0
>>> time.localtime() # The last number should be 0 == not DST
(2006, 2, 2, 12, 31, 0, 3, 33, 0)
>>> time.localtime(1154549697.0) # The last number should be 1 == DST
(2006, 8, 2, 13, 14, 57, 2, 214, 1)
Tags: programming, python
Subscribe

  • My feed URL has changed

    If anyone here follows my personal blog with a feed reader, you'll have to change the feed URL manually. The old URL can't redirect to the new one.…

  • Progress on my Google+ and LJ backups

    Since Google is going to shut down Google+, I decided it was time to really make a home for my LiveJournal backup and my Google+ backup. Working…

  • In Case of Link-Rot

    If anything should happen to this journal, a backup of it should eventually appear at this location. I don't expect or plan for anything to happen…

  • Post a new comment

    Error

    Comments allowed for friends only

    Anonymous comments are disabled in this journal

    default userpic

    Your reply will be screened

    Your IP address will be recorded 

  • 0 comments