[Tutor] Hey.need help on time

Ray Jones crawlzone at gmail.com
Thu Sep 6 11:23:45 CEST 2012

On 09/06/2012 02:08 AM, eryksun wrote:
> On Thu, Sep 6, 2012 at 4:25 AM, Ray Jones <crawlzone at gmail.com> wrote:
>> Why the additional step of calling time.tzset()? Once os.environ['TZ']
>> is set, I've found that time.localtime() responds to the new TZ without
>> anything extra. Is that a difference in versions (2.7.3 here)?
> It shouldn't strictly be necessary using glibc. I checked the source.
> glibc localtime calls __tz_convert() on each call, which calls
> tzset_internal() to update the TZ setting. However, I don't think
> that's guaranteed in all C runtimes. As the Python docs say,
> "[c]hanging the TZ environment variable without calling tzset *may*
> change the local timezone used by methods such as localtime, but this
> behaviour should not be relied on."
Got ya. I'll remember that.


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