Added setup.py and made all imports relative so it will work as a module.

setup.py

@@ -0,0 +1,28 @@
+#!/usr/bin/python3
+
+import setuptools
+from pathlib import Path
+
+# use readme file as long description
+this_directory = Path(__file__).parent
+long_description = (this_directory / "README.md").read_text()
+
+setuptools.setup(
+    name="Wobuzz",
+    version="0.0",
+    description="An audio player made by The Wobbler",
+    long_description=long_description,
+    long_description_content_type="text/markdown",
+    url="https://teapot.informationsanarchistik.de/Wobbl/Wobuzz",
+    author="The Wobbler",
+    author_email="emil@i21k.de",
+    packages=["wobuzz"],
+    package_data={"": ["*.txt"]},
+    install_requires=[
+        "PyQt6",
+        "wobbl_tools @ git+https://teapot.informationsanarchistik.de/Wobbl/wobbl_tools@main#egg=wobbl_tools"
+    ],
+    entry_points={
+        "console_scripts": ["wobuzz=wobuzz.command_line"],
+    }
+)

wobuzz/command_line.py

@@ -2,8 +2,7 @@
 
 import sys
 import argparse
-from main import Wobuzz
-from player.playlist import Playlist
+from .main import Wobuzz
 
 
 description = "A music player made by The Wobbler."

wobuzz/gui.py

@@ -2,7 +2,7 @@
 
 from PyQt6.QtCore import Qt
 from PyQt6.QtWidgets import QDockWidget
-from ui.main_window import MainWindow
+from .ui.main_window import MainWindow
 
 
 class GUI:

wobuzz/library/library.py

@@ -3,9 +3,9 @@
 from PyQt6.QtCore import Qt
 from PyQt6.QtGui import QIcon
 from PyQt6.QtWidgets import QTabWidget, QTreeWidgetItem, QAbstractItemView
-from player.playlist import Playlist
-from ui.library_dock import LibraryDock
-from ui.playlist import PlaylistView
+from ..player.playlist import Playlist
+from ..ui.library_dock import LibraryDock
+from ..ui.playlist import PlaylistView
 
 
 class Library:

wobuzz/main.py

@@ -3,12 +3,12 @@
 import sys
 from PyQt6.QtWidgets import QApplication
 from wobbl_tools.data_file import load_dataclass_json
-from settings import Settings
-from utils import Utils
-from player.player import Player
-from library.library import Library
-from gui import GUI
-from gui_communication.gui_communication import GUICommunication
+from .settings import Settings
+from .utils import Utils
+from .player.player import Player
+from .library.library import Library
+from .gui import GUI
+from .gui_communication.gui_communication import GUICommunication
 
 
 class Wobuzz: