tidy up and added a script to help you cut img into grid

split_img_to_grid.py

@@ -0,0 +1,34 @@
+import os
+
+from PIL import Image
+
+def split_image_to_grid(image_path, output_folder):
+    img = Image.open(image_path)
+    basename = os.path.basename(image_path).split(".")[0]
+
+    width, height = img.size
+    if width != height:
+        raise ValueError("The picture must be square!")
+
+    grid_size = width // 3
+
+    for row in range(3):
+        for col in range(3):
+            left = col * grid_size
+            top = row * grid_size
+            right = left + grid_size
+            bottom = top + grid_size
+
+            grid_img = img.crop((left, top, right, bottom))
+            os.makedirs(output_folder, exist_ok=True)
+            grid_img.save(f"{output_folder}/{basename}_{row}_{col}.png")
+
+    print("Success!")
+
+def main():
+    image_path = input("Please type in input file path:\n").replace("'", "")
+    output_folder = input("Please type in output dir path:\n").replace("'", "")
+    split_image_to_grid(image_path, output_folder)
+
+if __name__ == "__main__":
+    main()