[Python] Reading a file to get a directory from it but the file has more than just the...

I made a program that's supposed to monitor the world_path.json with watchdog in order to find a directory to events.log, then it monitors it to read keywords from it and then based on that keywords it changes the wallpaper.

When I run this program it shows the current path to event.log every 5 seconds for debug purposes. So right now it gets stuck on monitoring the latest_world.json and never actually finds the path to events.log even though it detects changes to it. What causes it to not update when it's supposed to?

import os
import json
import tkinter as tk
from tkinter import filedialog, ttk
from watchdog.observers import Observer
from watchdog.events import FileSystemEventHandler
import ctypes
import threading
import time


def set_wallpaper(image_path):
print(f"Attempting to change wallpaper: {image_path}")
if os.path.exists(image_path):
print(f"Changing wallpaper to: {image_path}")
ctypes.windll.user32.SystemParametersInfoW(20, 0,
image_path, 3)
else:
print(f"Wallpaper file not found: {image_path}")


class PaceWallpapersApp:
def __init__(self, root):
self.root = root
self.root.title("Pace Wallpapers")
self.root.geometry("500x400")

self.latest_world_path = ""
self.events_log_path =
"E:/multimc/MultiMC/instances/Instance 1/.minecraft/events.log"
self.wallpapers = {i: "" for i in range(8)}

self.notebook = ttk.Notebook(root)
self.main_frame = ttk.Frame(self.notebook)
self.wallpapers_frame = ttk.Frame(self.notebook)

self.notebook.add(self.main_frame, text="Main")
self.notebook.add(self.wallpapers_frame, text="Wallpapers")
self.notebook.pack(expand=True, fill="both")

ttk.Button(self.main_frame, text="Select latest_world.json",
command=self.select_latest_world).pack(pady=5)
ttk.Button(self.main_frame, text="Start Monitoring",
command=self.start_monitoring).pack(pady=5)
ttk.Button(self.main_frame, text="Stop Monitoring",
command=self.stop_monitoring).pack(pady=5)

self.wallpaper_labels = {}
for i in range(8):
frame = ttk.Frame(self.wallpapers_frame)
frame.pack(pady=2, fill="x")
btn = ttk.Button(frame, text=f"Select Wallpaper {i}",
command=lambda n=i: self.select_wallpaper(n))
btn.pack(side="left")
lbl = ttk.Label(frame, text="None", width=30)
lbl.pack(side="left", padx=5)
self.wallpaper_labels = lbl

self.observer = Observer()
self.latest_world_handler = LatestWorldHandler(self)
self.events_handler = EventsLogHandler(self)

self.monitor_thread =
threading.Thread(target=self.monitor_events_log_path,
daemon=True)
self.monitor_thread.start()

def monitor_events_log_path(self):
while True:
print(f"Current events.log path:
{self.events_log_path}")
time.sleep(5)

def select_latest_world(self):
file_path = filedialog.askopenfilename(filetypes=[("JSON
files", "*.json")])
if file_path:
self.latest_world_path = file_path
print(f"Selected latest_world.json: {file_path}")

def start_monitoring(self):
if not self.latest_world_path:
print("No latest_world.json selected.")
return
print("Starting monitoring latest_world.json...")
self.observer.schedule(self.latest_world_handler,
os.path.dirname(self.latest_world_path), recursive=False)
self.observer.start()

def stop_monitoring(self):
print("Stopping monitoring...")
self.observer.stop()
self.observer.join()
self.observer = Observer()

def select_wallpaper(self, index):
file_path = filedialog.askopenfilename(filetypes=[("Image
files", "*.jpg;*.png;*.bmp")])
if file_path:
self.wallpapers[index] = file_path

self.wallpaper_labels[index].config(text=os.path.basename
(file_path) )
print(f"Selected wallpaper {index}: {file_path}")
class LatestWorldHandler(FileSystemEventHandler):
def __init__(self, app):
self.app = app

def on_modified(self, event):
print(f"Detected change in latest_world.json:
{event.src_path}")
if event.src_path == self.app.latest_world_path:
with open(self.app.latest_world_path, "r") as file:
data = json.load(file)
world_path = data.get("world_path", "")
if world_path:
self.app.events_log_path =
os.path.join(world_path, "speedrunigt", "events.log")
print(f"Updated events.log path:
{self.app.events_log_path}")
if os.path.exists(self.app.events_log_path):
print(f"events.log found at:
{self.app.events_log_path}, monitoring started.")
else:
print("Warning: events.log does not exist at
the expected location!")

self.app.observer.schedule(self.app.events_handler,
os.path.dirname(self.app.events_log_path),
recursive=False)


class EventsLogHandler(FileSystemEventHandler):
def __init__(self, app):
self.app = app

def on_modified(self, event):
if event.src_path == self.app.events_log_path:
print(f"Detected change in events.log:
{event.src_path}")
with open(self.app.events_log_path, "r") as file:
lines = file.readlines()
for line in reversed(lines):
for keyword, wallpaper_num in {
"enter_nether": 1,
"enter_bastion": 2,
"enter_fortress": 3,
"first_portal": 4,
"enter_stronghold": 5,
"enter_end": 6,
"credits": 7,
"leave_world": 0
}.items():
if keyword in line:
print(f"Detected: {keyword}, new
wallpapre {wallpaper_num}")

set_wallpaper(self.app.wallpapers.get(wallpaper_num, ""))
return


if __name__ == "__main__":
root = tk.Tk()
app = PaceWallpapersApp(root)
app.start_monitoring()
root.mainloop()




self.wallpaper_labels[index].config(text=os.path.basename(file_path) )
print(f"Selected wallpaper {index}: {file_path}")


class LatestWorldHandler(FileSystemEventHandler):
def __init__(self, app):
self.app = app

def on_modified(self, event):
print(f"Detected change in latest_world.json:
{event.src_path}")
if event.src_path == self.app.latest_world_path:
with open(self.app.latest_world_path, "r") as file:
data = json.load(file)
world_path = data.get("world_path", "")
if world_path:
self.app.events_log_path =
os.path.join(world_path, "speedrunigt", "events.log")
print(f"Updated events.log path:
{self.app.events_log_path}")
if os.path.exists(self.app.events_log_path):
print(f"events.log found at:
{self.app.events_log_path}, monitoring started.")
else:
print("Warning: events.log does not exist at
the expected location!")

self.app.observer.schedule(self.app.events_handler,
os.path.dirname(self.app.events_log_path),
recursive=False)


class EventsLogHandler(FileSystemEventHandler):
def __init__(self, app):
self.app = app

def on_modified(self, event):
if event.src_path == self.app.events_log_path:
print(f"Detected change in events.log:
{event.src_path}")
with open(self.app.events_log_path, "r") as file:
lines = file.readlines()
for line in reversed(lines):
for keyword, wallpaper_num in {
"enter_nether": 1,
"enter_bastion": 2,
"enter_fortress": 3,
"first_portal": 4,
"enter_stronghold": 5,
"enter_end": 6,
"credits": 7,
"leave_world": 0
}.items():
if keyword in line:
print(f"Detected: {keyword}, new
wallpapre {wallpaper_num}")

set_wallpaper(self.app.wallpapers.get(wallpaper_num, ""))
return


if __name__ == "__main__":
root = tk.Tk()
app = PaceWallpapersApp(root)
app.start_monitoring()
root.mainloop()


The content of the latest_world.json file looks like this:

{"world_path":"E:/multimc/MultiMC/instances/psesjeisheesse/.minecraft/saves/New sea (11)","mods":["antigone","antiresourcereload","atum","chunkumulator","extra-options","fabricloader","fast_reset","forceport","java","krypton","lazydfu","lazystronghold","lithium","minecraft","mixinextras","sleepbackground","sodium","speedrunigt","standardsettings","starlight","state-output","state-output-common","voyager","worldpreview"],"version":"1.16.1","mod_version":"14.1+1.16.1","category":"ANY"}

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