SciFi Wallpaper: Python3: Set desktop wallpaper image in Bash CLI; center it; tile it: os.listdir(), datetime.date(), subprocess.run(), click

scifi_wallpaper.py

#! /bin/python3
'''`scifi_wallpaper` module contains methods for setting background image.
Along with the display mode. Help: $ python3 scifi_wallpaper.py
opensource.org/licenses/MIT'''
from os import listdir
from datetime import date
from subprocess import run
import click


SET_DESK_BG = ['gsettings', 'set', 'org.gnome.desktop.background']  # args 1

@click.group(chain=True)  # group the methods
def scifi_wallpaper():
    '''scifi_wallpaper group method.'''

@scifi_wallpaper.command()  # scifi-wallpaper group
def setimg():
    '''Set desktop wallpaper image of the day.'''
    list_imgs = listdir('/home/foo/scripts/scifi_wallpaper/img/')  # img dir
    list_imgs.sort()  # sort filenames d01 thru d31
    img_uri_args = ['picture-uri',
                    'file:///home/foo/scripts/scifi_wallpaper/img/' +
                    list_imgs[date.today().day - 1]]  # args 2
    run(SET_DESK_BG + img_uri_args, check=True)  # run cli args
    print(f'wallpaper img: \x1b[1;34m{list_imgs[date.today().day - 1]}\x1b[0m')

@scifi_wallpaper.command()  # scifi-wallpaper group
def center():
    '''Centered mode for desktop wallpaper image.'''
    args_center = ['picture-options', 'centered']  # args 2
    run(SET_DESK_BG + args_center, check=True)  # run cli args

@scifi_wallpaper.command()  # scifi-wallpaper group
def tile():
    '''Tile mode for desktop wallpaper image.'''
    args_tile = ['picture-options', 'wallpaper']  # args 2
    run(SET_DESK_BG + args_tile, check=True)  # run cli args


if __name__ == '__main__':
    scifi_wallpaper()  # if standalone

The /img directory needs to contain at least 31 images for a 31-day month. Set new image after midnight.

help: $ python3 scifi_wallpaper.py
set image: $ python3 scifi_wallpaper.py setimg
center image: $ python3 scifi_wallpaper.py center
tile image: $ python3 scifi_wallpaper.py tile

Copyright © 2020 nick3499

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.