Update

gradio/demo.py

@@ -7,6 +7,7 @@ def compare_face(frame1, frame2):
     files = {'image1': open(frame1, 'rb'), 'image2': open(frame2, 'rb')}
 
     r = requests.post(url=url, files=files)
+    faces = None
 
     try:
         image1 = Image.open(frame1)