hi,
I'm new to python core development, and I've been advised to write to
python-dev concerning a feature/patch I've placed at
http://bugs.python.org/issue5434, with Rietveld at
http://codereview.appspot.com/25079.
This patch adds a monthdelta class and a monthmod function to the
datetime
Hi Jess,
I'm sorry if I'm failing to understand the use of this function from not
looking closely at your code. I'm a bit dubious about the usefulness of this
(I'm not sure I understand the use cases), but I'm very open to being
convinced. Datetime semantics are very important in some areas -- I
On Thu, Apr 16, 2009 at 01:18:01AM -0500, Jess Austin wrote:
I'm new to python core development, and I've been advised to write to
python-dev concerning a feature/patch I've placed at
http://bugs.python.org/issue5434, with Rietveld at
http://codereview.appspot.com/25079.
I have read the
date(2008, 1, 30) + monthdelta(1)
datetime.date(2008, 2, 29)
What would this loop would print?
for d in range(1, 32):
print date(2008, 1, d) + monthdelta(1)
I have this funny feeling that arithmetic using monthdelta wouldn't always
be intuitive.
Skip
On Apr 16, 2009, at 1:10 AM, Oleg Broytmann wrote:
This patch adds a monthdelta class and a monthmod function to the
datetime module. The monthdelta class is much like the existing
timedelta class, except that it represents months offset from a date,
rather than an exact period offset from a
On Thu, Apr 16, 2009 at 10:45, s...@pobox.com wrote:
date(2008, 1, 30) + monthdelta(1)
datetime.date(2008, 2, 29)
What would this loop would print?
for d in range(1, 32):
print date(2008, 1, d) + monthdelta(1)
I have this funny feeling that arithmetic using monthdelta
On Thu, Apr 16, 2009 at 11:54, Amaury Forgeot d'Arc amaur...@gmail.com wrote:
In my opinion:
arithmetic with months is a mess. There is no such month interval or
year interval with a precise definition.
If we adopt some kind of month manipulation, it should be a function
or a method, like you
On Thu, Apr 16, 2009 at 12:10:36PM +0400, Oleg Broytmann wrote:
This patch adds a monthdelta class and a monthmod function to the
datetime module. The monthdelta class is much like the existing
timedelta class, except that it represents months offset from a date,
rather than an exact
On 15 Apr, 2009, at 22:47, Russell E. Owen wrote:
Thank you for 2.6.2.
I see the Mac binary installer isn't out yet (at least it is not
listed
on the downloads page). Any chance that it will be compatible with 3rd
party Tcl/Tk?
The Mac installer is late because I missed the
2009/4/16 Jess Austin jess.aus...@gmail.com:
I'm new to python core development, and I've been advised to write to
python-dev concerning a feature/patch I've placed at
http://bugs.python.org/issue5434, with Rietveld at
http://codereview.appspot.com/25079.
This patch adds a monthdelta class
2009/4/16 s...@pobox.com:
date(2008, 1, 30) + monthdelta(1)
datetime.date(2008, 2, 29)
What would this loop would print?
for d in range(1, 32):
print date(2008, 1, d) + monthdelta(1)
I have this funny feeling that arithmetic using monthdelta wouldn't always
be
Paul Moore p.f.moore at gmail.com writes:
Oh, certainly! But in the absence of intuitive, I've found in the
past that standardised is often better than nothing (For
example, I use Oracle's add_months function fairly often - it's not
perfect, and not always intuitive, but at least it's
At 03:46 AM 4/16/2009 +, gl...@divmod.com wrote:
On 15 Apr, 09:11 pm, p...@telecommunity.com wrote:
I think that there is some confusion here. A main package or
buildout that assembles a larger project from components is not the
same thing as having a base package for a namespace
In article
b8ad139e0904152318p5473cbe5yb5f55a19894cc...@mail.gmail.com,
Jess Austin jess.aus...@gmail.com wrote:
I'm new to python core development, and I've been advised to write to
python-dev concerning a feature/patch I've placed at
http://bugs.python.org/issue5434, with Rietveld at
On Thu, Apr 16, 2009 at 3:45 AM, s...@pobox.com wrote:
date(2008, 1, 30) + monthdelta(1)
datetime.date(2008, 2, 29)
What would this loop would print?
for d in range(1, 32):
print date(2008, 1, d) + monthdelta(1)
for d in range(1, 32):
... print(date(2008, 1, d) +
2009/4/16 Antoine Pitrou solip...@pitrou.net:
Paul Moore p.f.moore at gmail.com writes:
Oh, certainly! But in the absence of intuitive, I've found in the
past that standardised is often better than nothing (For
example, I use Oracle's add_months function fairly often - it's not
perfect, and
On Thu, Apr 16, 2009 at 5:16 AM, Dirkjan Ochtman dirk...@ochtman.nl wrote:
On Thu, Apr 16, 2009 at 11:54, Amaury Forgeot d'Arc amaur...@gmail.com
wrote:
In my opinion:
arithmetic with months is a mess. There is no such month interval or
year interval with a precise definition.
If we adopt
Thanks for everyone's comments!
On Thu, Apr 16, 2009 at 9:54 AM, Paul Moore p.f.mo...@gmail.com wrote:
I like the idea in principle. In practice, of course, month
calculations are inherently ill-defined, so you need to be very
specific in documenting all of the edge cases, and you should have
I installed the Mac binary on my Intel 10.5.6 system and it works,
except it still uses Apple's system Tcl/Tk 8.4.7 instead of my
ActiveState 8.4.19 (which is in /Library/Frameworks where one would
expect).
I just built python from source and that version does use ActiveState
8.4.19.
I
On 16 Apr 2009, at 11:42, Paul Moore wrote:
The key thing missing (I believe) from dateutil is any equivalent of
monthmod.
I agree with that. It's well-defined and it makes a lot of sense. +1
But, I dont think monthdelta can be made to work... what should the
following be?
On 2009-04-16 13:42, Paul Moore wrote:
2009/4/16 Ned Deilyn...@acm.org:
In article
b8ad139e0904152318p5473cbe5yb5f55a19894cc...@mail.gmail.com,
Jess Austinjess.aus...@gmail.com wrote:
I'm new to python core development, and I've been advised to write to
python-dev concerning a feature/patch
Jared Grubb jared.gr...@gmail.com wrote:
On 16 Apr 2009, at 11:42, Paul Moore wrote:
The key thing missing (I believe) from dateutil is any equivalent of
monthmod.
I agree with that. It's well-defined and it makes a lot of sense. +1
But, I dont think monthdelta can be made to work... what
Jon Ribbens jon+python-...@unequivocal.co.uk wrote:
On Thu, Apr 16, 2009 at 12:10:36PM +0400, Oleg Broytmann wrote:
This patch adds a monthdelta class and a monthmod function to the
datetime module. The monthdelta class is much like the existing
timedelta class, except that it represents
Jess Austin jess.austin at gmail.com writes:
What other behavior options besides last-valid-day-of-the-month
would you like to see?
IMHO, the question is rather what the use case is for the behaviour you are
proposing. In which kind of situation is it acceptable to turn 31/2 silently
into
Jess Austin wrote:
What other behavior options besides last-valid-day-of-the-month
would you like to see?
- Add 30 days to the source date.
I'm sure there are others.
Followups to python-ideas.
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2009/4/16 Robert Kern robert.k...@gmail.com:
On 2009-04-16 13:42, Paul Moore wrote:
2009/4/16 Ned Deilyn...@acm.org:
In article
b8ad139e0904152318p5473cbe5yb5f55a19894cc...@mail.gmail.com,
Jess Austinjess.aus...@gmail.com wrote:
I'm new to python core development, and I've been advised
On 2009-04-16 17:17, Paul Moore wrote:
2009/4/16 Robert Kernrobert.k...@gmail.com:
from dateutil.relativedelta import *
dt = relativedelta(months=1)
dt
relativedelta(months=+1)
from datetime import datetime
datetime(2009, 1, 15) + dt
datetime.datetime(2009, 2, 15, 0, 0)
datetime(2009, 1,
Antoine Pitrou solip...@pitrou.net wrote:
Jess Austin jess.austin at gmail.com writes:
What other behavior options besides last-valid-day-of-the-month
would you like to see?
IMHO, the question is rather what the use case is for the behaviour you are
proposing. In which kind of situation is
On Apr 16, 2009, at 5:47 PM, Antoine Pitrou wrote:
IMHO, the question is rather what the use case is for the behaviour
you are
proposing. In which kind of situation is it acceptable to turn 31/2
silently
into 29/2?
Essentially any situation in which you'd actually want a next month
I have this funny feeling that arithmetic using monthdelta wouldn't
always be intuitive.
Jess I think that's true, especially since these calculations are not
Jess necessarily invertible:
date(2008, 1, 30) + monthdelta(1)
datetime.date(2008, 2, 29)
date(2008, 2,
My thoughts on balance regarding monthdeltas:
-- Month operations are useful, people will want to do them
-- I think having a monthdelta object rather than a method makes sense to
me
-- I think the documentation is severely underdone. The functionality is
not intuitive
and therefore the
On Thu, Apr 16, 2009 at 7:18 PM, s...@pobox.com wrote:
I have this funny feeling that arithmetic using monthdelta wouldn't
always be intuitive.
Jess I think that's true, especially since these calculations are not
Jess necessarily invertible:
date(2008, 1, 30) +
Jess Austin wrote:
This is a perceptive observation: in the absence of parentheses to
dictate a different order of operations, the third quantity will
differ from the second.
Another aspect of this is the use case mentioned right
at the beginning of this discussion concerning a recurring
Actually, that's a point.
If its' the 31st of Jan, then +1 monthdelta will be 28 Feb and another +1
will be 28 March whereas 31st Jan +2 monthdeltas will be 31 March.
That's the kind of thing which really needs to be documented, or I think
people really will make mistakes.
For example, should a
On Fri, 17 Apr 2009 07:41:19 am Jess Austin wrote:
Others have suggested raising an exception when a month calculation
lands on an invalid date. Python already has that; it's spelled like
this:
dt = date(2008, 1, 31)
dt.replace(month=dt.month + 1)
Traceback (most recent call last):
On Fri, 17 Apr 2009 12:29:11 pm Steven D'Aprano wrote:
Adding one month to 31st January could mean:
1: raise an exception
2: return 28th February (last day of February)
3: return 3rd April (1 month = 31 days)
4: return 2nd April (1 month = 30 days)
5: return 28th February (1 month = 4
On 16 Apr, 11:11 pm, f...@fuhm.net wrote:
On Apr 16, 2009, at 5:47 PM, Antoine Pitrou wrote:
It's a human-interface operation, and as such, everyone (ahem) knows
what it means to say 2 months from now, but the details don't
usually have to be thought about too much. Of course when you have
On Fri, 17 Apr 2009 07:47:14 am Antoine Pitrou wrote:
Jess Austin jess.austin at gmail.com writes:
What other behavior options besides last-valid-day-of-the-month
would you like to see?
IMHO, the question is rather what the use case is for the behaviour
you are proposing. In which kind of
Jess If, on the other hand, one of the committers wants to toss this in
Jess at some point, whether now or 3 versions down the road, the patch
Jess is up at bugs.python.org (and I'm happy to make any suggested
Jess modifications).
Again, I think it needs to bake a bit. I
Tennessee If its' the 31st of Jan, then +1 monthdelta will be 28 Feb
Tennessee and another +1 will be 28 March whereas 31st Jan +2
Tennessee monthdeltas will be 31 March.
Other possible arithmetics:
* 31 Jan 2008 + monthdelta(2) might be
31 Jan 2008 + 31 days (# days in
On Fri, 17 Apr 2009 12:10:59 pm Tennessee Leeuwenburg wrote:
Actually, that's a point.
If its' the 31st of Jan, then +1 monthdelta will be 28 Feb and
another +1 will be 28 March whereas 31st Jan +2 monthdeltas will be
31 March.
That's the kind of thing which really needs to be documented,
In article dd982bd4-02ab-4395-afee-cd3d0eeb7...@u.washington.edu,
Russell Owen ro...@u.washington.edu wrote:
I installed the Mac binary on my Intel 10.5.6 system and it works,
except it still uses Apple's system Tcl/Tk 8.4.7 instead of my
ActiveState 8.4.19 (which is in /Library/Frameworks
On 16 Apr, 03:36 pm, p...@telecommunity.com wrote:
At 03:46 AM 4/16/2009 +, gl...@divmod.com wrote:
On 15 Apr, 09:11 pm, p...@telecommunity.com wrote:
Twisted has its own system for namespace packages, and I'm not
really sure where we fall in this discussion. I haven't been able to
Steven D'Aprano wrote:
2rd of March on leap years,
^^^
The turd of March?
--
Greg
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At 03:58 AM 4/17/2009 +, gl...@divmod.com wrote:
Just as a use-case: would the Java com.* namespace be an example
of a pure package with no base? i.e. lots of projects are in it,
but no project owns it?
Er, I suppose. I was thinking more of the various 'com.foo' and
'org.bar' packages
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