Command "python egg_info" failed with error code 1 in /tmp/pip-build-rnhk49o3/opencv-python/

How to fix the pip9.exceptions.InstallationError

Make sure the version of your pip and setuptools is sufficient for manylinux2014 wheels.

sudo python3 -m pip install -U pip
sudo python3 -m pip install -U setuptools


For me, python egg_info probably failed because of a recent change in python wheels, as manylinux1 wheels were replaced by manylinux2014 wheels according to open-cv faq.