Yes, NumPy depends on BLAS/LAPACK libraries which are written on Fortran. In tur...

marmaduke · on June 20, 2016

All of this is wrong. Numpy does not depend on fortran code and TF and theano implement their arithmetic without fortran code.

shepardrtc · on June 20, 2016

From http://docs.scipy.org/doc/numpy/user/building.html

> Various NumPy modules use FORTRAN 77 libraries

inlineint · on June 21, 2016

    $ pip show tensorflow theano
    
    Name: tensorflow
    Version: 0.7.1
    ...
    Requires: six, protobuf, wheel, numpy
    ---
    Name: Theano
    Version: 0.8.2
    ...
    Requires: six, scipy, numpy

You are right that arithmetic in both of them is not written on Fortran, but the packages do use NumPy as you can see in the pip output.