Update app.py

app.py

@@ -36,7 +36,7 @@ def get_model(model_type):
     
     model = keras.models.load_model(model_type)
 
-    if 'W877' in model_type:
+    if 'K400' in model_type:
         data_type = 'K400'
     else:
         data_type = 'SSv2'