Update app.py

app.py

@@ -154,9 +154,9 @@ def main():
         puzzle = np.asarray(puzzle)
      
         # Resizing puzzle to be solved
-        puzzle = cv2.resize(puzzle, (450,450))
+        sudoku_a = cv2.resize(puzzle, (450,450))
         # Preprocessing Puzzle 
-        su_puzzle = preprocess(puzzle)
+        su_puzzle = preprocess(sudoku_a)
         
         # Finding the outline of the sudoku puzzle in the image
         su_contour_1= su_puzzle.copy()