I want to know if and where [LAPACK][1], [BLAS][2], [ATLAS][3] packages are installed. I have been reading that these libraries speed up data crunching with numpy(python). 

How can it find the location of these packages (if they are installed) and turn them off? 


  [1]: https://en.wikipedia.org/wiki/LAPACK
  [2]: http://www.netlib.org/blas/
  [3]: https://en.wikipedia.org/wiki/Automatically_Tuned_Linear_Algebra_Software