#12518 closed enhancement (fixed)
Enumerated set from iterator
Reported by: | vdelecroix | Owned by: | vdelecroix |
---|---|---|---|
Priority: | major | Milestone: | sage-5.6 |
Component: | combinatorics | Keywords: | set, iterator |
Cc: | sstarosta | Merged in: | sage-5.6.beta2 |
Authors: | Vincent Delecroix | Reviewers: | Travis Scrimshaw |
Report Upstream: | N/A | Work issues: | |
Branch: | Commit: | ||
Dependencies: | #12653, #11795, #13778 | Stopgaps: |
Description (last modified by )
Implementation of a set (using the category framework) from a function that returns an iterator as in
sage: from sage.sets.set_from_iterator import EnumeratedSetFromIterator sage: E = EnumeratedSetFromIterator(graphs) {Graph on 0 vertices, Graph on 1 vertex, Graph on 2 vertices, Graph on 2 vertices, Graph on 3 vertices, Graph on 3 vertices, ...}
Note that in order to be able to pickle, we do not build directly a set from an iterator.
A previous implementation in sage-combinat was CombinatorialClassFromIterator? (in sage.combinat.combinat) which is now deprecated.
The patch depends on #12653 which allows to initialize a graph from a dictionnary of iterables.
Apply: trac_12518-enumerated_set_from_iterator-final.patch and trac_12518-enumerated_set_from_iterator-final_fix.patch
Attachments (4)
Change History (43)
comment:1 Changed 9 years ago by
comment:2 Changed 9 years ago by
- Cc sstarosta added
comment:3 Changed 9 years ago by
- Description modified (diff)
comment:4 Changed 9 years ago by
- Description modified (diff)
- Status changed from new to needs_review
comment:5 Changed 9 years ago by
I removed trailing whitespaces and correct a failing doctest.
comment:6 Changed 9 years ago by
I changed the attachment in order to make the patchbot happy :-)
comment:7 Changed 9 years ago by
- Reviewers set to PatchBot
- Status changed from needs_review to needs_work
But patchbot's not happy -- a bunch of doctests fail (as you can see from the latest patchbot logs). I reproduced this by hand on 5.0.beta7, so it's not just a patchbot issue. The failures all have something to do with dicts not being hashable. (I'm not sure what patch has caused this conflict, but it worked in 5.0.beta3; my guess would be #10998.)
comment:8 Changed 9 years ago by
- Dependencies set to #12653
- Description modified (diff)
- Status changed from needs_work to needs_review
comment:9 Changed 8 years ago by
I just remove the only trailing whitespace (in sage/combinat/combinat.py) that made the patchbot unhappy.
comment:10 follow-up: ↓ 11 Changed 8 years ago by
Hey Vincent,
I also get the patchbot errors when running the patch in the combinat queue on 5.5.rc0. Also from a quick look-through the patch, there are a few things which I believe needs to be addressed:
- Documentation and tests for the deprecated functions in
combinat/combinat.py
- An example in
iter_with_cache()
, I also don't quite understand the documentation. - You'll need to add
iter_with_cache
andset_from_iterator
to the documentation by adding/editing a.rst
file (probablymisc.rst
). - I prefer to see the reserved words in code blocks:
``None``
,``self``
,``True``
, and``False``
- Same for input parameters and private functions, even in private functions.
- I prefer to have as much linking as possible: ex.
:class:`EnumeratedSetFromIterator`
- Instead of
it is better to do
if x is True: ... if x is False: ...
in caseif x: ... if not x: ...
x
is not a boolean (ex.x = 1
).
Thanks,
Travis
comment:11 in reply to: ↑ 10 ; follow-up: ↓ 12 Changed 8 years ago by
Hi Travis,
I also get the patchbot errors when running the patch in the combinat queue on 5.5.rc0. Also from a quick look-through the patch, there are a few things which I believe needs to be addressed:
- Documentation and tests for the deprecated functions in
combinat/combinat.py
These functions were *only* in the sage-combinat queues and not inside Sage. So the deprecation is just intended for people from combinat who were using it (and I think that none of them uses it).
- An example in
iter_with_cache()
, I also don't quite understand the documentation.
I will open (few days) a new ticket for a better implementation of iter_with_cache. There is a similar construction in lazy power series and I would like to merge both. The idea is to have a Python data structure that behave like a list but with possibly infinitely many entries.
- I prefer to see the reserved words in code blocks:
``None``
,``self``
,``True``
, and``False``
Is there a difference for documentation ? I thought that code blocks open a new paragraph.
Thanks for careful reading, I will adress all remarks in a new patch.
Best, Vincent
comment:12 in reply to: ↑ 11 Changed 8 years ago by
Hey Vincent,
I also get the patchbot errors when running the patch in the combinat queue on 5.5.rc0. Also from a quick look-through the patch, there are a few things which I believe needs to be addressed:
- Documentation and tests for the deprecated functions in
combinat/combinat.py
These functions were *only* in the sage-combinat queues and not inside Sage. So the deprecation is just intended for people from combinat who were using it (and I think that none of them uses it).
Since these functions are not in sage, its probably best to remove these functions from this patch and then put a second patch in the combinat queue deprecating these functions.
- I prefer to see the reserved words in code blocks:
``None``
,``self``
,``True``
, and``False``
Is there a difference for documentation ? I thought that code blocks open a new paragraph.
I should have called it (inline) code format, and it just changes the format in the output html.
Thanks,
Travis
Changed 8 years ago by
comment:13 Changed 8 years ago by
- Dependencies changed from #12653 to #12653, #13778
comment:14 Changed 8 years ago by
Hi,
The error in patchbot comes from the lazy import of graphs (which does not support pickling). I modify a little bit the implementation to use the generic framework of lazy list (in #13778). In particular, there is no more iter_with_cache.
Best, Vincent
comment:15 follow-up: ↓ 17 Changed 8 years ago by
- Reviewers changed from PatchBot to Travis Scrimshaw
Hey Vincent,
I'm uploading a review patch which just makes some documentation tweaks. Functionally it looks good.
However I would like those functions in combinat/combinat.py
removed since they only exist in your patch (I grep'ed the patches in the queue and only found them in this patch), and I believe we don't need to follow the sage deprecation scheme within the combinat queue (please correct me if I'm wrong). If you're worried about it, I would place the functions in a separate patch.
Thank you,
Travis
Changed 8 years ago by
comment:16 Changed 8 years ago by
- Description modified (diff)
comment:17 in reply to: ↑ 15 Changed 8 years ago by
Hi Travis,
I'm uploading a review patch which just makes some documentation tweaks. Functionally it looks good.
I fold your patch in trac_12518-*-final-*
However I would like those functions in
combinat/combinat.py
removed since they only exist in your patch (I grep'ed the patches in the queue and only found them in this patch), and I believe we don't need to follow the sage deprecation scheme within the combinat queue (please correct me if I'm wrong). If you're worried about it, I would place the functions in a separate patch.
I removed it and I also delete the decorator on bruhat_succ adn bruhat_pred that was previously on the sage-combinat server.
Thanks, Vincent
comment:18 Changed 8 years ago by
Hey Vincent,
Thanks. However there's one small mistake (and it's mine in the review patch, sorry) in the class doc for EnumeratedSetFromIterator
, it should be .. NOTE::
, the space is missing.
Best,
Travis
Edit - Once you do this, feel free to set this to positive review.
For patchbot:
Apply only: trac_12518-enumerated_set_from_iterator-final.patch
comment:19 Changed 8 years ago by
- Status changed from needs_review to positive_review
All right... done
comment:20 Changed 8 years ago by
- Description modified (diff)
comment:21 Changed 8 years ago by
apply trac_12518-enumerated_set_from_iterator-final.patch
(for patchbot)
comment:22 Changed 8 years ago by
- Status changed from positive_review to needs_work
The following does not work
sage: from sage.sets.set_from_iterator import set_from_method sage: class A: ... a = 10 ... @set_from_method ... def f(self): ... return xsrange(self.a) sage: a = A() sage: a.f() # works perfectly {0, 1, 2, 3, 4, ...} sage: A.f(a) # does not work at all Traceback (most recent call last): ... TypeError: f() takes exactly 1 argument (2 given)
It causes many problems with element classes which are Cython classes.
I am on this. Sorry. Vincent
comment:23 Changed 8 years ago by
apply trac_12518-enumerated_set_from_iterator-final.patch
(for patchbot)
comment:24 Changed 8 years ago by
- Status changed from needs_work to needs_review
comment:25 follow-up: ↓ 26 Changed 8 years ago by
Hey Vincent,
Could you remove all of your (commented) print statements and move the DummyExampleForPicklingTest
into the doctest for __init__()
where you use it?
Thanks,
Travis
comment:26 in reply to: ↑ 25 ; follow-up: ↓ 27 Changed 8 years ago by
Hey Travis,
Could you remove all of your (commented) print statements
This I can.
and move the
DummyExampleForPicklingTest
into the doctest for__init__()
where you use it?
Do you mean put the whole class DummyExampleForPicklingTest? into the doctest ? If it is the case, I can not because pickling classes defined in an interactive console is not (easily) possible.
Cheers, Vincent
comment:27 in reply to: ↑ 26 Changed 8 years ago by
Replying to vdelecroix:
and move the
DummyExampleForPicklingTest
into the doctest for__init__()
where you use it?Do you mean put the whole class DummyExampleForPicklingTest? into the doctest ? If it is the case, I can not because pickling classes defined in an interactive console is not (easily) possible.
Ah okay, then a quick doctest for the f()
method and something like:
.. WARNING:: This class is used for pickling tests only. Do not use.
docstring for the class. Thanks.
Changed 8 years ago by
comment:28 Changed 8 years ago by
apply trac_12518-enumerated_set_from_iterator-final.patch
(for patchbot)
comment:29 follow-up: ↓ 30 Changed 8 years ago by
- Status changed from needs_review to positive_review
Looks good to me now. Thanks Vincent.
comment:30 in reply to: ↑ 29 Changed 8 years ago by
comment:31 Changed 8 years ago by
- Description modified (diff)
apply trac_12518-enumerated_set_from_iterator-final.patch trac_12518-enumerated_set_from_iterator-final_fix.patch
(for patchbot)
comment:32 Changed 8 years ago by
- Dependencies changed from #12653, #13778 to #12653, #11795, #13778
- Milestone changed from sage-5.6 to sage-pending
comment:33 Changed 8 years ago by
- Milestone changed from sage-pending to sage-5.6
comment:34 Changed 8 years ago by
- Description modified (diff)
comment:35 follow-up: ↓ 36 Changed 8 years ago by
- Status changed from positive_review to needs_work
trac_12518-enumerated_set_from_iterator-final_fix.patch is missing a commit message.
Changed 8 years ago by
comment:36 in reply to: ↑ 35 Changed 8 years ago by
Replying to jdemeyer:
trac_12518-enumerated_set_from_iterator-final_fix.patch is missing a commit message.
Thanks. Done.
comment:37 Changed 8 years ago by
- Merged in set to sage-5.6.beta2
- Resolution set to fixed
- Status changed from needs_work to closed
comment:38 follow-up: ↓ 39 Changed 6 years ago by
Could you please explain the motivation behind the doctests
TESTS:: sage: from sage.sets.set_from_iterator import set_from_method sage: from sage.structure.misc import getattr_from_other_class sage: class A: ... stop = 10000 ... @set_from_method ... def f(self,start): ... return xsrange(start,self.stop) sage: a = A() sage: getattr_from_other_class(a, A, 'f')(4) {4, 5, 6, 7, 8, ...} sage: class B: ... stop = 10000 ... @set_from_method(category=FiniteEnumeratedSets()) ... def f(self,start): ... return xsrange(start,self.stop) sage: b = B() sage: getattr_from_other_class(b, B, 'f')(2) {2, 3, 4, 5, 6, ...}
However, the documentation of getattr_from_other_class
says:
If self is an instance of cls, raises an ``AttributeError``, to avoid a double lookup. This function is intended to be called from __getattr__, and so should not be called if name is an attribute of self.
But this is precisely what that doctest is doing! Due to a bug in getattr_from_other_class
(see #17801), the AttributeError
is not always raised when it should. The obvious fix for that bug gives doctest failures in the above doctests.
comment:39 in reply to: ↑ 38 Changed 6 years ago by
Replying to jdemeyer:
Could you please explain the motivation behind the doctests ...
No idea. I guess it would be safe to replace them with sage: A.f(a,4)
and sage: B.f(b,2)
.
Hi,
I'm in trouble with two points:
1) What to do with the equality test when the set are both infinite ? (see in the patch the warning printing on stderr)
2) What is the good way to implement the decorator for a method ? The implementation for functions work quite well but in sage.misc.cachefunc the implementation for methods rather than functions seem more tricky.