Update app.py

app.py

@@ -28,6 +28,7 @@ from diffusion.script_util import create_model_and_diffusion, model_and_diffusio
 import numpy as np
 import imageio
 
+
 def fetch(url_or_path):
     if str(url_or_path).startswith('http://') or str(url_or_path).startswith('https://'):
         r = requests.get(url_or_path)