Struggling with pyscript

[stain3565]

I have been struggling with pyscript code for a while now. I have a script that takes in the name of a jpeg file and then calls some compiled python code to overwrite a theme with this name (hopefully to replace the lovelace background).

The current code is below:

`import fileinput
import sys
import os
import time
from contextlib import chdir

@service
def changefilepyscript(currentbackground):

contents, exception = task.executor(changetheme, currentbackground)
if exception:
raise exception
log.info(f"contents = {contents}")

@pyscript_compile
def changetheme(file_selected):

path = '/config/themes/myhouse'
yamlfile = 'myhouse.yaml'
with chdir(path):
with open(yamlfile) as file:
data = file.readlines()
data[13] = f' lovelace-background: "center / cover no-repeat url('local/images/backgrounds/{ file_selected }')"\n'

with open(yamlfile, 'w') as file:

file.writelines(data)`

For the time being, I have commented out the actual overwrite until I am sure the rest of the code works.

I have run it with the following action:

action: pyscript.changefilepyscript data: currentbackground: housedayverycloudy.jpg

Currently, the error I am getting is:

`This error originated from a custom integration.

Logger: custom_components.pyscript.file.edit_myhouse_theme.changefilepyscript
Source: custom_components/pyscript/eval.py:510
integration: Pyscript Python scripting (documentation, issues)
First occurred: 10:45:20 (1 occurrences)
Last logged: 10:45:20

Exception in <file.edit_myhouse_theme.changefilepyscript> line 21: contents, exception = task.executor(changetheme, currentbackground) ^ TypeError: cannot unpack non-iterable object`

I am struggling to understand this error. Note: I did attempt to use Jupyter but my laptop browser has consistently failed to attach to the hass pyscript kernel so I am stuck with manual debugging in Home Assistant.

Also, apologies for how the formatted code looks. This discussion template doesn't seem to format as expected and whatever I do, it seems to be applying its own formatting