Update demo.py

demo.py

@@ -6,7 +6,10 @@ from PIL import Image
 
 def idcard_recognition(frame1, frame2):
     url = "http://127.0.0.1:8080/idcard_recognition_multi_page"
-    files = {'file1': open(frame1, 'rb'), 'file2': open(frame2, 'rb')}
+    if frame2 is None:
+        files = {'file1': open(frame1, 'rb')}
+    else
+        files = {'file1': open(frame1, 'rb'), 'file2': open(frame2, 'rb')}
 
     r = requests.post(url=url, files=files)