On Jul 5, 12:16 pm, Chris Angelico ros...@gmail.com wrote:
So it's even easier than I said. And bonus lesson for the day: Try
things in the interactive interpreter before you post. :)
but first: be sure to familiarize yourself with the many built-in
python classes(sic). Re-inventing the wheel
Thanks to all for further comments!
Just for completeness and in case somebody would like to provide some
suggestions or corrections;
the following trivial class should be able to deal with the initial
requirement of adding or subtracting dateless time values
(hour:minute).
regards,
vbr
# # # #
Many thanks to all for your suggestions!
@ChrisA
Yes, the calculations with seconds since the Unix epoch is very
convenient for real times, but trying to make it dateless seemed to
make it more complicated for me.
The expected output for the increments asked by Jason was already
correctly stated
On Thu, Jul 5, 2012 at 11:18 PM, Vlastimil Brom
vlastimil.b...@gmail.com wrote:
Yes, the calculations with seconds since the Unix epoch is very
convenient for real times, but trying to make it dateless seemed to
make it more complicated for me.
The expected output for the increments asked by
On Wednesday, July 4, 2012 6:29:10 PM UTC-6, Vlastimil Brom wrote:
Hi all,
I'd like to ask about the possibilities to do some basic manipulation
on timestamps - such as incrementing a given time (hour.minute -
string) by some minutes.
Very basic notion of time is assumed, i.e. dateless,
On Thu, 05 Jul 2012 23:56:37 +1000, Chris Angelico wrote:
(The magic number 86400 is a well-known number, being seconds in a
day.
Does that include leap seconds?
Feel free to replace it with 24*60*60 if it makes you feel better;
I'm pretty sure Python will translate it into a constant at
On Jul 5, 10:19 am, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
The number of seconds in a day (true solar day) varies by between 13 and
30 seconds depending on the time of the year and the position of the sun.
Indeed. Which proves that a time keeping system based on the
On Fri, Jul 6, 2012 at 1:19 AM, Steven D'Aprano
steve+comp.lang.pyt...@pearwood.info wrote:
On Thu, 05 Jul 2012 23:56:37 +1000, Chris Angelico wrote:
(The magic number 86400 is a well-known number, being seconds in a
day.
Does that include leap seconds?
No it doesn't, hence...
Feel free
On Fri, Jul 6, 2012 at 1:39 AM, Rick Johnson
rantingrickjohn...@gmail.com wrote:
On Jul 5, 10:19 am, Steven D'Aprano steve
+comp.lang.pyt...@pearwood.info wrote:
The number of seconds in a day (true solar day) varies by between 13 and
30 seconds depending on the time of the year and the
On Thu, Jul 5, 2012 at 7:56 AM, Chris Angelico ros...@gmail.com wrote:
I'm not familiar with the Python classes (I tend to think in terms of
language-agnostic algorithms first, and specific libraries/modules/etc
second), but if you're working with simple integer seconds, your
datelessness is
On Fri, Jul 6, 2012 at 3:06 AM, Ian Kelly ian.g.ke...@gmail.com wrote:
The + 86400 is redundant; you'll get the same answer with or without
it. There is nothing to fear from going negative when doing modulo
arithmetic, because unlike C, Python actually has well-defined
semantics regarding
On 7/4/2012 5:29 PM, Vlastimil Brom wrote:
Hi all,
I'd like to ask about the possibilities to do some basic manipulation
on timestamps - such as incrementing a given time (hour.minute -
string) by some minutes.
Very basic notion of time is assumed, i.e. dateless,
timezone-unaware, DST-less etc.
On Thursday, July 5, 2012 11:34:16 AM UTC-6, John Nagle wrote:
[...]
You can also call time.time(), and get the number of seconds
since the epoch (usually 1970-01-01 00:00:00 UTC). That's just
a number, and you can do arithmetic on that.
Adding a datetime.time to a datetime.timedelta
On Thu, 05 Jul 2012 11:15:04 -0700, rurpy wrote:
On Thursday, July 5, 2012 11:34:16 AM UTC-6, John Nagle wrote:
[...]
You can also call time.time(), and get the number of seconds
since the epoch (usually 1970-01-01 00:00:00 UTC). That's just a
number, and you can do arithmetic on that.
Hi all,
I'd like to ask about the possibilities to do some basic manipulation
on timestamps - such as incrementing a given time (hour.minute -
string) by some minutes.
Very basic notion of time is assumed, i.e. dateless,
timezone-unaware, DST-less etc.
I first thought, it would be possible to just
On Thu, Jul 5, 2012 at 10:29 AM, Vlastimil Brom
vlastimil.b...@gmail.com wrote:
I'd like to ask about the possibilities to do some basic manipulation
on timestamps - such as incrementing a given time (hour.minute -
string) by some minutes.
Very basic notion of time is assumed, i.e. dateless,
On 05/07/2012 01:29, Vlastimil Brom wrote:
Hi all,
I'd like to ask about the possibilities to do some basic manipulation
on timestamps - such as incrementing a given time (hour.minute -
string) by some minutes.
Very basic notion of time is assumed, i.e. dateless,
timezone-unaware, DST-less etc.
Hi all,
I'd like to ask about the possibilities to do some basic manipulation
on timestamps - such as incrementing a given time (hour.minute -
string) by some minutes.
Very basic notion of time is assumed, i.e. dateless,
timezone-unaware, DST-less etc.
I first thought, it would be possible
On Thu, Jul 5, 2012 at 12:57 AM, Jason Friedman ja...@powerpull.net wrote:
I have some thoughts on a solution, but first, what is 12:45 plus 12
hours? What is 12:45 minus 13 hours?
Is there anything unusual that can happen for a notion of time that is
dateless, timezone-unaware, and DST-free?
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