Here’s how you can programmatically change your wallpaper in KDE.
You need to execute the following script inside the Plasma Shell.
desktops().forEach(d => {
d.currentConfigGroup = Array(
"Wallpaper",
"org.kde.image",
"General");
d.writeConfig("Image", "file://[FILE_PATH]");
d.reloadConfig();
});
You can construct this as a string, replace [FILE_PATH] with the path to the image file, and then send a d-bus message to the Plasma Shell. For this, I use the following command.
qdbus6 org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.evaluateScript $scriptText
Python script
Here’s a Python script that downloads a random Anime picture and sets it as wallpaper.
#!/usr/bin/env python
import requests
import subprocess
from pathlib import Path
import tempfile
def set_wallpaper(p: Path):
p = p.resolve()
script = """
desktops().forEach(d => {
d.currentConfigGroup = Array("Wallpaper",
"org.kde.image",
"General");
d.writeConfig("Image", "file://FILEPATH");
d.reloadConfig();
});
""".replace("FILEPATH", str(p))
cmd = [
"qdbus6",
"org.kde.plasmashell",
"/PlasmaShell",
"org.kde.PlasmaShell.evaluateScript",
script,
]
subprocess.check_call(cmd, stdout=subprocess.DEVNULL)
def main():
with tempfile.NamedTemporaryFile() as f:
p = Path(f.name).resolve()
url = "https://pic.re/image"
p.write_bytes(requests.get(url).content)
set_wallpaper(p)
if __name__ == "__main__":
main()
