A better DateTime.rfc822() (Was: [Zope-Coders] Linux Test Results - Zope 2.6 branch - failures:1)

[Shane Hathaway]

Lennart Regebro wrote:
> How does this look to you guys? Should work, eh?
> 
> ----
> 
> def _tzoffset2rfc822zone(seconds):
>     return "%+03d%02d" % divmod( (seconds/60), 60)
> 
> 
>     def rfc822(self):
>         """Return the date in RFC 822 format"""
>         tzoffset = _tzoffset2rfc822zone(_tzoffset(self._tz, 0.0))
> 
>         return '%s, %2.2d %s %d %2.2d:%2.2d:%2.2d %s' % (
>             self._aday,self._day,self._amon,self._year,
>             self._hour,self._minute,self._nearsec,tzoffset)
> 
> ----
> 
> The good thing is that it's now as far as I can see, completely independant
> of what the local timezone is. I didn't find the _tzoffset method before,
> because I was looking at the DateTime object, but it's not located there,
> it's a module function, not a class method!

You'll want to use _tzoffset like this:

_tzoffset(self._tz, self._t)

That way, the actual zone offset can change over time, which follows the 
complicated time zone conventions.  If you have a moment, you could add 
a docstring to the _tzoffset function, too.

Guido is writing a replacement datetime module for Zope 3 and Python 
2.3.  (And there was much rejoicing.)

Shane