A couple of tips so I don't have to look it up again. A few months back I wanted to generate coverage data for a stand-alone application, with a few tweaks.
Combining the output of Trial and Python unit tests
$ coverage run -p tests/my_python_tests.py $ coverage run -p tests/my_trial_tests.py $ coverage combine $ coverage html -d tests/coverage_html --include=./*py --omit='lib/*.py,tests/*.py'
Helpful resources to get used to combine:
Getting coverage report for a simple project
$ coverage run tests/python_tests.py $ coverage report --include=./*py --omit='lib/*.py,tests/*.py' # For a text summary $ coverage html -d tests/reports --include=./*py --omit='lib/*.py,tests/*.py' # For a nice HTML report
Installing the latest version
To get access to the command line tools, I had to install Coverage in a virtualenv to get around some other constraints on the system. I thought I'd build it from master while I was at it :)
$ virtualenv coverage $ cd coverage $ source bin/activate $ pip install hg+http://bitbucket.org/ned/coveragepy
Coverage is a lovely library and a wonderful way to encourage yourself to think more about your unit tests -- give it a try if you haven't already. (PS: For Django, see django-coverage)