Tensorflow 1.13.1 wheel built for Python 2.7 without GPU on Ubuntu 16.04 running on a Westmere CPU that does not support AVX instructions (one generation older than Sandy Bridge).
Usage:
pip install tensorflow-1.13.1-cp27-cp27mu-linux_x86_64.whl
This could be useful if your CPU is too old for the official Tensorflow package on PyPI.