def append_use_flags(atom, uses=None, overwrite=False):
    if not uses:
        uses = portage.dep.dep_getusedeps(atom)
    if len(uses) == 0:
        return
    atom = atom[:atom.rfind('[')]
    append_to_package_conf('use', atom=atom, flags=uses, overwrite=overwrite)
Perform achallenges without IDisplay interaction.
dataset/ETHPy150Open saltstack/salt/salt/modules/portage_config.py/append_use_flags--crossover with--dataset/ETHPy150Open letsencrypt/letsencrypt/certbot/plugins/standalone.py/Authenticator.perform2