Update app.py

app.py

@@ -10,6 +10,7 @@ from svglib.svglib import svg2rlg
 from reportlab.graphics import renderPM
 from PIL import Image
 import os
+from uuid import uuid4
 
 
 vocab_size=33
@@ -46,7 +47,7 @@ def generate(prompt):
     except Exception as e:
         if 'illegal san' in str(e):
             return pgn, invalid_move_plot
-    filename = f'./moves-{pgn}'
+    filename = f'./moves-{str(uuid4())}'
     with open(filename + '.svg', 'w') as f:
         f.write(img)
     drawing = svg2rlg(filename + '.svg')