Update app.py

app.py

@@ -41,6 +41,9 @@ def bag_of_words(s, words):
         for i, w in enumerate(words):
             if w == se:
                 bag[i] = 1
+
+    if not any(bag):  # Check if bag is all zeros
+        print("Warning: No matching words found in vocabulary.")
     return np.array(bag)
 
 
@@ -51,12 +54,17 @@ def chat(message, history=None):
     try:
         print("User message:", message)  # Debugging
         bag = bag_of_words(message, words)
-        print("Bag of words:", bag)  # Debugging
+        print("Bag representation:", bag)  # Debugging
         results = model.predict([bag])
         print("Prediction results:", results)  # Debugging
+
+        if not results.any():  # Handle empty or invalid predictions
+            raise ValueError("Model returned no valid predictions.")
+
         results_index = np.argmax(results)
         tag = labels[results_index]
         print("Predicted tag:", tag)  # Debugging
+
     except Exception as e:
         print(f"Error during processing: {e}")  # Log the error
         response = "I'm sorry, I couldn't understand your message."