NumPy 1.16.2 Release Notes#
NumPy 1.16.2 is a quick release fixing several problems encountered on Windows. The Python versions supported are 2.7 and 3.5-3.7. The Windows problems addressed are:
DLL load problems for NumPy wheels on Windows,
distutils command line parsing on Windows.
There is also a regression fix correcting signed zeros produced by divmod, see below for details.
Downstream developers building this release should use Cython >= 0.29.2 and, if using OpenBLAS, OpenBLAS > v0.3.4.
If you are installing using pip, you may encounter a problem with older
installed versions of NumPy that pip did not delete becoming mixed with the
current version, resulting in an ImportError
. That problem is particularly
common on Debian derived distributions due to a modified pip. The fix is to
make sure all previous NumPy versions installed by pip have been removed. See
#12736 for discussion of the
issue.
Compatibility notes#
Signed zero when using divmod#
Starting in version 1.12.0, numpy incorrectly returned a negatively signed zero
when using the divmod
and floor_divide
functions when the result was
zero. For example:
>>> np.zeros(10)//1
array([-0., -0., -0., -0., -0., -0., -0., -0., -0., -0.])
With this release, the result is correctly returned as a positively signed zero:
>>> np.zeros(10)//1
array([0., 0., 0., 0., 0., 0., 0., 0., 0., 0.])
Contributors#
A total of 5 people contributed to this release. People with a “+” by their names contributed a patch for the first time.
Charles Harris
Eric Wieser
Matti Picus
Tyler Reddy
Tony LaTorre +
Pull requests merged#
A total of 7 pull requests were merged for this release.
#12909: TST: fix vmImage dispatch in Azure
#12923: MAINT: remove complicated test of multiarray import failure mode
#13020: BUG: fix signed zero behavior in npy_divmod
#13026: MAINT: Add functions to parse shell-strings in the platform-native…
#13028: BUG: Fix regression in parsing of F90 and F77 environment variables
#13038: BUG: parse shell escaping in extra_compile_args and extra_link_args
#13041: BLD: Windows absolute path DLL loading