Status: Accepted
Owner: smi...@gmail.com
Labels: Type-Defect Priority-Medium EasyToFix
New issue 2689 by smi...@gmail.com: Set and Dict args should be sorted
http://code.google.com/p/sympy/issues/detail?id=2689
Dict and Set should compare the same regardless of order that args are
input. This
Comment #1 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
I'm running into a lot of attribute problems with these containers:
Why doesn't tuple Sort nicely?
sorted([Tuple(1,2),Tuple(3,2)])
[(1, 2), (3, 2)]
Comment #2 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
Dict doesn't sort:
sorted([Dict((1,2)),Dict((2,1))])
[{2: 1}, {1: 2}]
sorted(reversed([Dict((1,2)),Dict((2,1))])
[{2: 1}, {1: 2}]
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Comment #3 on issue 2689 by christian.muise: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
Why not overload equality, and check every element in one is in the other
(and vice versa)?
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Comment #4 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
OK, I have the basics defined (__eq__, __cmp__, __iter__ and sort the
args) so now:
args = [(1,2),(2,1)]
for o in [Dict, Tuple, Set]:
... if
Comment #5 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
OK, now it's working. I wanted to have the multiset_partitions to be
turned into a set to show only the unique permutations:
from
Updates:
Labels: smichr NeedsReview
Comment #6 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
https://github.com/sympy/sympy/pull/604
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Comment #3 on issue 2654 by asmeurer: lambdify() does not convert abs()
http://code.google.com/p/sympy/issues/detail?id=2654
Does the built-in abs() not work correctly? That would have been what was
happening before.
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Comment #7 on issue 2689 by asmeurer: Set and Dict args should be sorted
http://code.google.com/p/sympy/issues/detail?id=2689
for a Set (which is not a python-like set() in that it can contain
duplicate)
When can this happen? This shouldn't be the case for a mathematical set.
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Comment #8 on issue 2689 by ronan.l...@gmail.com: Set and Dict args should
be sorted
http://code.google.com/p/sympy/issues/detail?id=2689
When can this happen? This shouldn't be the case for a mathematical set.
ProductSet(Interval(0, 1), Interval(0, 1))
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Comment #9 on issue 2689 by ronan.l...@gmail.com: Set and Dict args should
be sorted
http://code.google.com/p/sympy/issues/detail?id=2689
More generally, Set doesn't mean at all what you think it means: it's a
base class for all symbolic objects representing sets (e.g. Interval,
Comment #10 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
Set(1, 1, 2, 3)
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Comment #11 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
I've had my head in combinations today...right now a set looks like a
collection of items and so when I see sympy's Set I think that it
should behave like
Comment #13 on issue 2689 by asmeurer: Set and Dict args should be sorted
http://code.google.com/p/sympy/issues/detail?id=2689
So what does Set(1, 2) mean then?
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Comment #14 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
I'm leaving Set alone. Ronan's comments have helped clear up the
confusion and I left a breadcrumb in the docstring to help someone
else stay away from
Comment #15 on issue 2689 by asmeurer: Set and Dict args should be sorted
http://code.google.com/p/sympy/issues/detail?id=2689
So should Set by imported by from sympy import *? That seems like it
would lead to confusion. Actually, what should be our policy on importing
base classes and
Comment #16 on issue 2689 by smi...@gmail.com: Set and Dict args should be
sorted
http://code.google.com/p/sympy/issues/detail?id=2689
Well, I got stung by it today. I think it would have been better to
not load the base class.
Also, re what Set(1,2) means...it means that Set is a Basic
Comment #7 on issue 1475 by someb...@bluewin.ch: New implementation
of .eval in trigonometric functions, implementing sec, csc
http://code.google.com/p/sympy/issues/detail?id=1475
I'm currently working on this and will finish a first version
of all missing trigonometric and hyperbolic
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