How to Fix Python Nose: Coverage not available: unable to import coverage module

Question

I can't seem to get code coverage with Nose to work, despite having the plugin installed.

Any ideas on how to fix this?

12:15:25 ~/sandbox/ec$ nosetests --plugins
Plugin xunit
Plugin deprecated
Plugin skip
Plugin multiprocess
Plugin failuredetail
Plugin capture
Plugin logcapture
Plugin coverage
Plugin attributeselector
Plugin doctest
Plugin profile
Plugin id
Plugin allmodules
Plugin collect-only
Plugin isolation
Plugin pdb

12:15:34 ~/sandbox/ec$ nosetests -v --with-coverage
nose.plugins.cover: ERROR: Coverage not available: unable to import coverage module
tests.edgecast_client_tests.test_log ... ok

----------------------------------------------------------------------
Ran 1 test in 0.206s

OK

Melamine

Answer 1

Have you tried pip install coverage? The coverage plugin depends on separate coverage module, which is not a nose's dependency, so needs to be installed manually.

Phelps

on debian/ubuntu you could install via apt-get install python-coverage as well – Exorcist

I've installed it both ways and it still gives me the same error. – Firehouse

I received the same error in the original question even though I have the coverage package installed in my virtualenv. My problem was that the nosetests command was coming from my system-wide installation of nose, and I didn't have coverage installed system-wide. By prepending the full path to the executable in my virtualenv, /path/to/virtualenv/bin/nosetests --with-coverage worked. – Calabresi

@velotron Strangely, the same solution worked for me despite the fact that I don't have a system-wide installation of nose – Damascus

@Exorcist @Diego You may need to use apt-get install python3-coverage if you have Python3. – Nur

@velotron I tried installing nose into my virtualenv (along with coverage), which seemed to work. – Tanh

My virtualenv has python3.4.2. I did pip install coverage and the issue went away. So the accepted answer worked for me. – Geest

Updating both packages pip install coverage -U and pip install nose -U did it for me. But with older nose (1.3.0) I am getting coverage (4.0.3) that shows me which line numbers are not covered. – Volcano

Answer 2

Validate if the coverage module is working by itself via coverage --version. I had a case that it was not working due to the lack of SQLite modules in my python installation from the source. I reinstalled python with SQLite extension to fix the issue.

Vanhomrigh

See https://mcmap.net/q/116540/-no-module-named-_sqlite3/… for details when using pyenv. – Violence