def get_or_create_project_venv():
venv_dir = get_project_venv_dir()<EOL>if os.path.exists(venv_dir):<EOL><INDENT>return VirtualEnv(venv_dir)<EOL><DEDENT>else:<EOL><INDENT>return create_project_venv()<EOL><DEDENT>
Create a project-level virtualenv (if it does not already exist).

:return: ``VirtualEnv`` object