make code compatible with PyInstaller

src/main_window.py

@@ -3,6 +3,7 @@ from PyQt6.QtWidgets import QMainWindow, QWidget
 from PyQt6 import uic
 
 import output_window
+import resource_finder
 
 
 class SIPPCompare(QMainWindow):
@@ -10,7 +11,7 @@ class SIPPCompare(QMainWindow):
     def __init__(self, plat_edit_win: QWidget):
         super().__init__()
         # Import Qt Designer UI XML file
-        uic.loadUi("gui/main_gui.ui", self)
+        uic.loadUi(resource_finder.get_res_path("gui/main_gui.ui"), self)
 
         # Initialise class variables
         # Inputs

src/output_window.py

@@ -4,12 +4,14 @@ from PyQt6 import uic
 import datetime
 import os
 
+import resource_finder
+
 
 class OutputWindow(QWidget):
     def __init__(self):
         super().__init__()
         # Import Qt Designer UI XML file
-        uic.loadUi("gui/output_window.ui", self)
+        uic.loadUi(resource_finder.get_res_path("gui/output_window.ui"), self)
 
         # Initialise class variables
         self.results_str = ""

src/platform_edit.py

@@ -5,13 +5,14 @@ from PyQt6 import uic
 
 from widgets.fastedit_spinbox import FastEditQDoubleSpinBox
 import main_window
+import resource_finder
 
 
 class PlatformEdit(QWidget):
     def __init__(self, autofill: bool):
         super().__init__()
         # Import Qt Designer UI XML file
-        uic.loadUi("gui/platform_edit.ui", self)
+        uic.loadUi(resource_finder.get_res_path("gui/platform_edit.ui"), self)
 
         # Initialise class variables
         # Create main window object, passing this instance as param

src/resource_finder.py

@@ -0,0 +1,13 @@
+import os.path
+import sys
+
+
+# If using PyInstaller, use it's temporary path, otherwise use cwd
+# Credit: https://stackoverflow.com/questions/7674790/bundling-data-files-with-pyinstaller-onefile/13790741#13790741
+def get_res_path(relative_path):
+    try:
+        base_path = sys._MEIPASS
+    except AttributeError:
+        base_path = os.path.abspath(".")
+
+    return os.path.join(base_path, relative_path)