What is the numpy pypi package naming convention

Question

Trying to determine which numpy package is compatible with my python environment. My server has no internet access, so I need to download and install the package locally.

I know the cp27 refers to Python 2.7, but what is the difference between these two packages:

numpy-1.12.0rc1-cp27-cp27m-manylinux1_x86_64.whl
numpy-1.12.0rc1-cp27-cp27mu-manylinux1_x86_64.whl

Answer 1

The differing part is an ABI tag.

• mu indicates --enable-unicode=ucs4

• m on its own is --enable-unicode=ucs2

See UCS-2 vs UCS-4 builds; to determine which you need for your current installation, see How to find out if Python is compiled with UCS-2 or UCS-4?