Update app.py

app.py

@@ -27,7 +27,7 @@ def greet(image):
 #     x = torch.ones([1,3,224,224])
     if(image is None):
         bn_data = print_bn()
-        return ','.join([f{x:.5f} for x in bn_data])
+        return ','.join([f'{x:.5f}' for x in bn_data])
     else:  
         print(type(image))
         image = torch.tensor(image).float()