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  • [Python-announce] ANN: NumExpr 2.8.7

    From Francesc Alted@faltet@gmail.com to comp.lang.python.announce on Tue Sep 26 11:10:36 2023
    From Newsgroup: comp.lang.python.announce

    Hi everyone,

    NumExpr 2.8.7 is a release to deal with issues related to downstream
    `pandas`
    and other projects where the sanitization blacklist was triggering issues
    in their
    evaluate. Hopefully, the new sanitization code would be much more robust
    now.

    For those who do not wish to have sanitization on by default, it can be
    changed
    by setting an environment variable, `NUMEXPR_SANITIZE=0`.

    If you use `pandas` in your packages it is advisable you pin

    `numexpr >= 2.8.7`

    in your requirements.

    Project documentation is available at:

    http://numexpr.readthedocs.io/

    Changes from 2.8.6 to 2.8.7
    ---------------------------

    * More permissive rules in sanitizing regular expression: allow to access digits
    after the . with scientific notation. Thanks to Thomas Vincent.

    * Don't reject double underscores that are not at the start or end of a variable
    name (pandas uses those), or scientific-notation numbers with digits
    after the
    decimal point. Thanks to Rebecca Palmer.

    * Do not use `numpy.alltrue` in the test suite, as it has been deprecated
    (replaced by `numpy.all`). Thanks to Rebecca Chen.

    * Wheels for Python 3.12. Wheels for 3.7 and 3.8 are not generated anymore.

    What's Numexpr?
    ---------------

    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 has 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.

    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

    Documentation is hosted at:

    http://numexpr.readthedocs.io/en/latest/

    Share your experience
    ---------------------

    Let us know of any bugs, suggestions, gripes, kudos, etc. you may
    have.

    Enjoy data!
    --
    Francesc Alted
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