Updates:
Status: Started
Blockedon: -1047 1717
Comment #10 on issue 1723 by ronan.l...@gmail.com: .is_real == False for a
real number
http://code.google.com/p/sympy/issues/detail?id=1723
".is_real will be deprecated, so let's not try to fix it. Please feel free
to reopen
in case of disagreement."
Well, I disagree. There's no telling when the new assumptions system will
replace the
old and it's not certain either that this will cause .is_real to be
deprecated.
Anyway, here's a patch without tests that gives z.is_real = None. I've run
into issue
1717, so the patch includes a solution for it as well. I'm not sure how and
where
this should be tested (I thought of z = (-1)**Rational(1,3)*(1-I*sqrt(3));
assert
z.is_real in [True, None]).
Attachments:
0001-Make-Mul.is_real-and-Mul.is_imaginary-always-return-.patch 5.0 KB
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