pip failing to build wheels for scipy

scipy pip pep python-3.8
alex_lewis picture alex_lewis · Oct 18, 2019 · Viewed 11.2k times · Source

I've just downloaded the new python 3.8 and I'm trying to install the scipy package using the following:

pip3.8 install scipy

However the build fails with the following error:

**Failed to build scipy**

**ERROR: Could not build wheels for scipy which use PEP 517 and cannot be installed directly**

How can I install this using pip? I tried using the --no-binary version:

pip3.8 install --no-binary :all: scipy

but ended up with an even scarier error:

**ERROR: Command errored out with exit status 1: /Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/8p/01_5ykld02v61rtjl8k_8j200000gp/T/pip-install-wlnk_0jg/scipy/setup.py'"'"'; __file__='"'"'/private/var/folders/8p/01_5ykld02v61rtjl8k_8j200000gp/T/pip-install-wlnk_0jg/scipy/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' install --record /private/var/folders/8p/01_5ykld02v61rtjl8k_8j200000gp/T/pip-record-01j_ddt8/install-record.txt --single-version-externally-managed --compile Check the logs for full command output.**

Answer

S. R. Colledge picture S. R. Colledge · Oct 24, 2019

I think I got the same issue as you did. Did the error code have this message

error: library dfftpack has Fortran sources but no Fortran compiler found?

Because to me, it sounds like a Fortran compiler error, and not a mistake of python per se. I think what happens is that the wheel requires some sort of Fortran compiler and when the installation doesn't find one it simply terminates the build. Here is the solution that I found:

Linux

sudo apt install gfortran

Windows / Mac

Download it from here: https://gcc.gnu.org/wiki/GFortran#download

This solution fixed it for me. Check out: Still can't install scipy due to missing fortran compiler after brew install gcc on Mac OS X for more details.

Related questions

Installing SciPy with pip

It is possible to install NumPy with pip using pip install numpy. Is there a similar possibility with SciPy? (Doing pip install scipy does not work.) Update The package SciPy is now available to be installed with pip!

Read More
Installing SciPy and NumPy using pip

I'm trying to create required libraries in a package I'm distributing. It requires both the SciPy and NumPy libraries. While developing, I installed both using apt-get install scipy which installed SciPy 0.9.0 and NumPy 1.5.1, and it worked fine. I would like …

Read More
Build wheel for a package (like scipy) lacking dependency declaration

I think it doesn't make a difference here but I'm using Python 2.7. So the general part of my question is the following: I use a separate virtualenv for each of my projects. I don't have administrator access and I don't …

Read More