app.py

# condition originelle

(new_app_dict['lastUpdate'] > current_app_dict['lastUpdate']) \

or ('update_time' not in current_app_dict['settings'] \
   and (new_app_dict['lastUpdate'] > current_app_dict['settings']['install_time'])) \

or ('update_time' in current_app_dict['settings'] \
    and (new_app_dict['lastUpdate'] > current_app_dict['settings']['update_time']))

# hypothèse que new_app_dict == current_app_dict d'après
# https://github.com/YunoHost/yunohost/blob/unstable/src/yunohost/app.py#L366-L367

('update_time' not in current_app_dict['settings'] \
    and (new_app_dict['lastUpdate'] > current_app_dict['settings']['install_time'])) \

or ('update_time' in current_app_dict['settings'] \
    and (new_app_dict['lastUpdate'] > current_app_dict['settings']['update_time']))

# réécriture

last_app_update_time = current_app_dict["settings"].get("update_time" current_app_dict["settings"]["install_time"])

new_app_dict['lastUpdate'] > last_app_update_time