Python-announce-list June 2016

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ANN: numexpr 2.6.0 released
by Francesc Alted 01 Jun '16

01 Jun '16

========================= Announcing Numexpr 2.6.0 ========================= Numexpr is a fast numerical expression evaluator for NumPy. With it, expressions that operate on arrays (like "3*a+4*b") are accelerated and use less memory than doing the same calculation in Python. It wears multi-threaded capabilities, as well as support for Intel's MKL (Math Kernel Library), which allows an extremely fast evaluation of transcendental functions (sin, cos, tan, exp, log...) while squeezing the last drop of performance out of your multi-core processors. Look here for a some benchmarks of numexpr using MKL: https://github.com/pydata/numexpr/wiki/NumexprMKL Its only dependency is NumPy (MKL is optional), so it works well as an easy-to-deploy, easy-to-use, computational engine for projects that don't want to adopt other solutions requiring more heavy dependencies. What's new ========== This is a minor version bump because it introduces a new function. Also some minor fine tuning for recent CPUs has been done. More specifically: - Introduced a new re_evaluate() function for re-evaluating the previous executed array expression without any check. This is meant for accelerating loops that are re-evaluating the same expression repeatedly without changing anything else than the operands. If unsure, use evaluate() which is safer. - The BLOCK_SIZE1 and BLOCK_SIZE2 constants have been re-checked in order to find a value maximizing most of the benchmarks in bench/ directory. The new values (8192 and 16 respectively) give somewhat better results (~5%) overall. The CPU used for fine tuning is a relatively new Haswell processor (E3-1240 v3). In case you want to know more in detail what has changed in this version, see: https://github.com/pydata/numexpr/blob/master/RELEASE_NOTES.rst Where I can find Numexpr? ========================= The project is hosted at GitHub in: https://github.com/pydata/numexpr You can get the packages from PyPI as well (but not for RC releases): http://pypi.python.org/pypi/numexpr Share your experience ===================== Let us know of any bugs, suggestions, gripes, kudos, etc. you may have. Enjoy data! -- Francesc Alted

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py.test 2.9.2 released
by Ronny Pfannschmidt 01 Jun '16

01 Jun '16

pytest-2.9.2 ============ pytest is a mature Python testing tool with more than a 1100 tests against itself, passing on many different interpreters and platforms. See below for the changes and see docs at: http://pytest.org As usual, you can upgrade from pypi via:: pip install -U pytest Thanks to all who contributed to this release, among them: Adam Chainz Benjamin Dopplinger Bruno Oliveira Florian Bruhin John Towler Martin Prusse Meng Jue MengJueM Omar Kohl Quentin Pradet Ronny Pfannschmidt Thomas Güttler TomV Tyler Goodlet Happy testing, The py.test Development Team 2.9.2 (compared to 2.9.1) --------------------------- **Bug Fixes** * fix `#510`_: skip tests where one parameterize dimension was empty thanks Alex Stapleton for the Report and `@RonnyPfannschmidt`_ for the PR * Fix Xfail does not work with condition keyword argument. Thanks `@astraw38`_ for reporting the issue (`#1496`_) and `@tomviner`_ for PR the (`#1524`_). * Fix win32 path issue when puttinging custom config file with absolute path in ``pytest.main("-c your_absolute_path")``. * Fix maximum recursion depth detection when raised error class is not aware of unicode/encoded bytes. Thanks `@prusse-martin`_ for the PR (`#1506`_). * Fix ``pytest.mark.skip`` mark when used in strict mode. Thanks `@pquentin`_ for the PR and `@RonnyPfannschmidt`_ for showing how to fix the bug. * Minor improvements and fixes to the documentation. Thanks `@omarkohl`_ for the PR. * Fix ``--fixtures`` to show all fixture definitions as opposed to just one per fixture name. Thanks to `@hackebrot`_ for the PR. .. _#510: https://github.com/pytest-dev/pytest/issues/510 .. _#1506: https://github.com/pytest-dev/pytest/pull/1506 .. _#1496: https://github.com/pytest-dev/pytest/issue/1496 .. _#1524: https://github.com/pytest-dev/pytest/issue/1524 .. _@prusse-martin: https://github.com/prusse-martin .. _@astraw38: https://github.com/astraw38

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py.test 2.9.2 released
by Ronny Pfannschmidt 01 Jun '16

01 Jun '16

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Python-announce-list June 2016