initial prototype

util.py

@@ -0,0 +1,17 @@
+#!/usr/bin/env python3.11
+from pygame.image import load
+from pygame import Surface
+import os
+
+def load_image(filename: str) -> Surface:
+  if '.' in filename and filename.split('.')[1] not in ['png', 'jpg', 'jpeg']:
+    raise Exception(f'Invalid filename: must be of filetype \'.png\' \'.jpg\' or \'.jpeg\' not of .{filename.split(".")[1]}')
+  
+  cwd = os.getcwd()
+  dirName = '' if cwd.endswith('formula2D') else '/formula2D'
+  path = f'{cwd}{dirName}/resources/{filename}'
+  
+  if not os.path.isfile(path):
+    raise Exception(f'Filepath not found: \'{path}\' cannot be found')
+
+  return load(path)