Update app.py

app.py

@@ -2,14 +2,17 @@ import os
 from flask import Flask, jsonify, request, render_template
 import config  # <--- Imported configuration module
 from extensions import mongo, mail 
-# from services.evaluation import evaluate_answer # This line is already present
+# We need to import urllib for proper URL escaping in case the MONGO_URI needs to be manually cleaned.
+from urllib.parse import quote_plus
+# --- END IMPORTS ---
+
 
 # --- START DATABASE CONNECTION FIX ---
 # Reads the MONGO_URI from the environment/secrets (set via Hugging Face Secrets).
 MONGO_URI_SECRET = os.environ.get('MONGO_URI') 
 
 # Define the database name to be used (ensure this name exists in your Atlas cluster)
-DB_NAME = "assessment_db" # <--- FIXED: Using the confirmed database name from Atlas
+DB_NAME = "assessment_db" # FIXED: Using the confirmed database name from Atlas
 
 if MONGO_URI_SECRET:
     # Use the MONGO_URI from the environment (Hugging Face Secret) for deployment
@@ -42,7 +45,7 @@ app.register_blueprint(test_bp)
 from services.feedback_agent import build_feedback_agent
 app.feedback_agent = build_feedback_agent()
 
-# Import the evaluation logic (models load here)
+# Import the evaluation logic (models load here, all NLTK/HF caching fixed)
 from services.evaluation import evaluate_answer # Imported, models loaded here
 
 @app.route("/")
@@ -50,10 +53,9 @@ def home():
     # This line uses the explicit client connection (mongo.cx) and database name (DB_NAME)
     # to avoid the 'AttributeError: NoneType' object has no attribute 'tests' crash.
     global DB_NAME 
+    # Use mongo.cx[DB_NAME] for reliable database access in Flask-PyMongo setups.
     tests = list(mongo.cx[DB_NAME].tests.find({}, {"_id": 0})) 
     return render_template("home.html", tests=tests)
 
 if __name__ == "__main__":
-    app.run(debug=True)
-
-![image](https://cdn-uploads.huggingface.co/production/uploads/6793bf93ee8348777299a7ce/zeypqrWO2BHJ3gr4UPCcS.png)
+    app.run(debug=True)