Update course_recommender.py

course_recommender.py

@@ -27,6 +27,10 @@ class CourseRecommender:
         """Preprocess the data for training"""
         df_processed = df.copy()
         
+        # Normalize strand to uppercase for case-insensitive matching
+        if 'strand' in df_processed.columns:
+            df_processed['strand'] = df_processed['strand'].astype(str).str.upper()
+        
         # Encode categorical variables
         categorical_columns = ['strand', 'hobbies']
         
@@ -343,4 +347,4 @@ class CourseRecommender:
     def add_feedback(self, course: str, stanine: int, gwa: float, strand: str, 
                     rating: int, hobbies: str) -> bool:
         """Add user feedback to the database"""
-        return self.db_connection.add_feedback(course, stanine, gwa, strand, rating, hobbies)
+        return self.db_connection.add_feedback(course, stanine, gwa, strand, rating, hobbies)