docs: def create_venv(local='y', test='y', general='y'):
      """Create virtualenv w/requirements. Specify y/n for local/test/general to control installation."""
      if not path.isdir(project_paths.venv):
          execute('virtualenv', '--distribute', '--no-site-packages', project_paths.venv)
          project.execute_python('-m', 'easy_install', 'pip')
      if local.lower() == 'y' and project_paths.local_requirements:
          project.execute_pip('install', '--upgrade', '-r', project_paths.local_requirements)
      if test.lower() == 'y' and project_paths.test_requirements:
          project.execute_pip('install', '--upgrade', '-r', project_paths.test_requirements)
      if general.lower() == 'y' and project_paths.requirements_txt:
          project.execute_pip('install', '--upgrade', '-r', project_paths.requirements_txt)