Why not just use the library function?

This post captures some good reasons for having an algorithm in Python, rather than simply calling a fast library function:

https://jakevdp.github.io/blog/2015/02/24/optimizing-python-with-numpy-and-numba/

• Pure-Python code is easier to read, understand, and contribute to. 

• Pure-python packages are much easier to install than Python-wrapped C or Fortran code. 

• Pure-python code often works for many data types. 

• Pure-python is easier to use at scale.

-Doug