Re: [Numpy-discussion] Corner case complex log error.

On Tue, Jul 22, 2008 at 2:21 PM, Pauli Virtanen wrote:

Tue, 22 Jul 2008 15:13:09 -0500, Robert Kern wrote:

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On Tue, Jul 22, 2008 at 14:57, Pauli Virtanen wrote:

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Tue, 22 Jul 2008 00:34:46 -0600, Charles R Harris wrote:

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FAIL: test_umath.TestC99.test_clog(, (-0.0, -0.0), (-inf, -0.0), 'divide') AssertionError: ('(-inf, 3.1415926535897931)', '(-inf, 0.0)')

The interesting thing is that there is no test like this in test_umath.py. The closest thing is the second test in test_clog, which is (+0., 0.), (-inf, 0.). Does this vanish if you comment it out?

I think it's a weirdness in the way that Python can handle literals in the same statement.

If so, it seems like a platform-dependent quirk:

Python 2.5.2 (r252:60911, Apr 21 2008, 11:12:42) [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2

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(-0.0, 0.0) (-0.0, 0.0)

Anyway, I marked the probable culprit as skipped for now.

Or maybe a Python bug Python 2.5.1 (r251:54863, Jun 15 2008, 18:24:51) [GCC 4.3.0 20080428 (Red Hat 4.3.0-8)] on linux2 I doesn't show up in Python 2.3.7 either. Chuck