BLAS1_D a Python library which constitutes the Level 1 Basic Linear Algebra Subprograms (BLAS), for vector-vector operations using double precision real arithmetic, by Charles Lawson, Richard Hanson, David Kincaid, Fred Krogh.
The BLAS are a small core library of linear algebra utilities, which can be highly optimized for various architectures.
The Level 1 BLAS are primarily for use in vector operations. In certain cases, they may also be used to operate on the rows or columns of a two-dimensional array.
The computer code and data files described and made available on this web page are distributed under the GNU LGPL license.
BLAS1_D is available in a C version and a C++ version and a FORTRAN90 version and a MATLAB version and a Python version.
LINPACK_D, a library which is a linear algebra package using double precision real arithmetic.
Original FORTRAN77 version by Charles Lawson, Richard Hanson, David Kincaid, Fred Krogh. Python version by John Burkardt.
You can go up one level to the Python source codes.