On Tue, Aug 20, 2019 at 6:14 AM Matthew Brett <matthew.brett@gmail.com> wrote:

On Tue, Aug 20, 2019 at 11:10 AM Brian Skinn <brian.skinn@gmail.com> wrote:
> On Tue, Aug 20, 2019, 06:05 Matthew Brett <matthew.brett@gmail.com> wrote:
>> Hi,
>> See the links that Wes posted for more details, or try pip installing
>> Numpy and Scipy in a new virtualenv, and see what happens.
> Probably needs to:
>    pip install --only-binary :all: numpy scipy

Pip doesn't build from source by default - here's the output from my
machine just now:

 $ pip install numpy scipy
Collecting numpy
  Downloading https://files.pythonhosted.org/packages/4a/2e/cf0a2fea6d97604a0e058e804b50d589c31b360b317be9f5c126b22a560e/numpy-1.17.0-cp35-cp35m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
     |████████████████████████████████| 15.0MB 38.9MB/s
Collecting scipy
  Downloading https://files.pythonhosted.org/packages/c5/40/f73bc951b060ba143f2092a3a2dd755f5ef2b52376fc3f4d297942aef04b/scipy-1.3.1-cp35-cp35m-macosx_10_6_intel.macosx_10_9_intel.macosx_10_9_x86_64.macosx_10_10_intel.macosx_10_10_x86_64.whl
     |████████████████████████████████| 27.6MB 35.8MB/s
Installing collected packages: numpy, scipy
Successfully installed numpy-1.17.0 scipy-1.3.1

Hard to argue with concrete data -- my bad!

I wonder if there's an OS dependence here, though -- I'm almost certain I've had to use `--only-binary` in the past, to avoid pip on my Windows machines trying to download and build sdists, even when wheels were available.