Contained in a directory, conventionally either named venv or .venv in the project directory, or under a container directory for lots of virtual environments, such as ~/.virtualenvs.
This PR updates the pep8 test so that if the venv is in the project directory, the site-packages won't be tested.
The venv doc says that a virtual environment is:
This PR updates the pep8 test so that if the venv is in the project directory, the site-packages won't be tested.