How to fix 'error: option --rednose not recognized'

Problem:

You want to test a Python package e.g. using python setup.py test. However, you see the following error message:

usage: setup.py [global_opts] cmd1 [cmd1_opts] [cmd2 [cmd2_opts] ...]
   or: setup.py --help [cmd1 cmd2 ...]
   or: setup.py --help-commands
   or: setup.py cmd --help

error: option --rednose not recognized

Solution

Rednose is a Python package that you need to install:

sudo pip3 install rednose

or, if you don’t have pip3, try

sudo pip install rednose