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I'm trying to install Scipy in a virtual env through pip and I'm getting an error that says numpy.distutils.system_info.BlasNotFoundError I've never run into this before and I installed numpy from pip, so it should've installed everything correctly. I looked on the Blas website and I could only find a version for FORTRAN and I don't know if that's what I need. Any help would be appreciated!

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    Yeah, BLAS is written in FORTRAN. You need the shared library.
    – Alex Chamberlain
    Aug 26, 2012 at 19:10
  • I downloaded the tar with the FORTRAn files. How do I install it as a shared library? Or am I looking for something else?
    – ohblahitsme
    Aug 26, 2012 at 19:20
  • What distro are you using? It's probably in the repositories tbh.
    – Alex Chamberlain
    Aug 26, 2012 at 19:23

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If you're on Raspbian, install the package libblas-dev though apt. It should work fine after that.

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  • I additionally had to install gfortran, libopenblas-base and libatlas-base-dev to make it work.
    – leosh
    Jan 12, 2020 at 10:58

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