gh-155966: Correct handling of tanpi(0.5) (#155966) - #155980
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As pointed out in the issue, the exceptional half-integer (0.5, 1.5, etc) inputs of tanpi were not handled properly. Now, these raise ValueError and this is tested by `test.test_math` through its list of test cases.
skirpichev
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Aug 18, 2026
…YOADY.rst Co-authored-by: Sergey B Kirpichev <skirpichev@gmail.com>
the test harness cannot verify the sign of infinity, it can only verify the exception; but it's good for it to be correct anyhow.
This reverts commit faa1799.
skirpichev
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Aug 18, 2026
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CC @picnixz |
mdickinson
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skirpichev
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Mildly off-topic: in case anyone's interested, there's some fun reading here: https://grouper.ieee.org/groups/msc/ANSI_IEEE-Std-754-2019/background/tanpi.txt |
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As pointed out in #155966, the exceptional half-integer (0.5, 1.5, etc) inputs of tanpi were not handled properly.
Now, these raise ValueError and this is tested by
test.test_maththrough its list of test cases.In the process of working on this, I noticed that I had incorrectly added duplicate test ids and that this was not treated as an error by the test harness. I have corrected this and made it part of the test.
math.tanpiis untested at its poles and no test-file flag fits #155966