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Status: Duplicate
Mergedinto: 1884
Comment #1 on issue 1615 by Vinzent.Steinberg: Symbol('x', real=True)
should create global assumption
http://code.google.com/p/sympy/issues/detail?id=1615
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Comment #9 on issue 1884 by Vinzent.Steinberg: remove old assumptions
http://code.google.com/p/sympy/issues/detail?id=1884
Issue 1615 has been merged into this issue.
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Comment #3 on issue 1384 by Vinzent.Steinberg: assumptions docs are wrong
http://code.google.com/p/sympy/issues/detail?id=1384
is_real actually returns None.
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Comment #4 on issue 1384 by Vinzent.Steinberg: assumptions docs are wrong
http://code.google.com/p/sympy/issues/detail?id=1384
I send a patch just removing the offending line.
Why have we is_comparable=False? IMHO, this is redundant to is_real.
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Comment #10 on issue 1884 by Vinzent.Steinberg: remove old assumptions
http://code.google.com/p/sympy/issues/detail?id=1884
Mateusz, I addressed the concerns you raised (except the slow And) in my
new_assump
branch. Is this what you meant? Do you think these change
Comment #11 on issue 1884 by Vinzent.Steinberg: remove old assumptions
http://code.google.com/p/sympy/issues/detail?id=1884
Actually, the speed difference is not as big as I expected:
In [6]: %timeit x.is_positive
100 loops, best of 3: 393 ns per loop
In [7]: %timeit ask(x, Q.positive)
100
Comment #6 on issue 1860 by Vinzent.Steinberg: Symbols with shape
http://code.google.com/p/sympy/issues/detail?id=1860
I think this should be implemented using new-style assumptions. Maybe Mul()
should
raise an exception when used for incompatible shapes. But this would really
be a
great ad
Comment #12 on issue 1884 by ronan.l...@gmail.com: remove old assumptions
http://code.google.com/p/sympy/issues/detail?id=1884
I don't quite understand the point of this inspect magic. What is the
difference with
explicitly creating an AssumptionsContext() instance? (which, BTW, is just a
str
Comment #13 on issue 1884 by Vinzent.Steinberg: remove old assumptions
http://code.google.com/p/sympy/issues/detail?id=1884
The point is to stay backward compatible. Without inspect magic you would
have to write
a = AssumptionsContext()
x = Symbol('x', real=True, ctx=a)
instead of
x = Symb
Comment #14 on issue 1884 by Vinzent.Steinberg: remove old assumptions
http://code.google.com/p/sympy/issues/detail?id=1884
For reference, the failure I'm getting in my branch:
$ bin/test assum # hangs
^CTraceback (most recent call last):
File "bin/test", line 16, in
import sympy
File
Updates:
Summary: clean-up Symbol's assumptions
Status: Started
Labels: -Type-Defect -Priority-High -WrongResult -NeedsReview
Type-Enhancement Priority-Medium
Comment #5 on issue 1384 by Vinzent.Steinberg: clean-up Symbol's assumptions
http://code.google.com/p/sympy/issues/det
Comment #20 on issue 1798 by ronan.l...@gmail.com: Refactoring Basic
http://code.google.com/p/sympy/issues/detail?id=1798
"Expr" is just a placeholder name so it would be nice to find a better
alternative.
I'm not really convinced by "Term", however. It suggests that the class
represents
pa
Comment #21 on issue 1798 by Vinzent.Steinberg: Refactoring Basic
http://code.google.com/p/sympy/issues/detail?id=1798
-if not hasattr(a,i):
+if not hasattr(a,i) or i in ['__dict__']:
Why was this change necessary? Please add the reason to the commit message.
Th
Comment #3 on issue 1729 by Vinzent.Steinberg: doctest failure on new
master for Windows 32 sys
http://code.google.com/p/sympy/issues/detail?id=1729
Is this fixed now?
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Comment #15 on issue 1884 by Vinzent.Steinberg: remove old assumptions
http://code.google.com/p/sympy/issues/detail?id=1884
I fixed this and some bugs, however currently symbols() and probably also
var() are
not correctly creating local assumptions.
Just to clarify: The new_assump branch is
Comment #22 on issue 1798 by ronan.l...@gmail.com: Refactoring Basic
http://code.google.com/p/sympy/issues/detail?id=1798
Thanks, I had forgotten about this. There were test failures related to
pickling that
I didn't really understand. It turns out that many classes had gained a
__dict__
att
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