More infos:
      https://powerline.readthedocs.io/en/latest/installation.html#pip-installation

def install_upgrade_powerline():
    '''
    More infos:
      https://powerline.readthedocs.io/en/latest/installation.html#pip-installation
    '''
    checkup_git_repo_legacy('https://github.com/powerline/powerline.git')
    path_to_powerline = os.path.expanduser('~/repos/powerline')
    run(flo('pip install --user --editable={path_to_powerline}'))
    run('pip show powerline-status')  # only for information
    install_special_glyphs()
    bindings_dir = '~/repos/powerline/powerline/bindings'
    scripts_dir = '~/repos/powerline/scripts'
    return bindings_dir, scripts_dir