Update app.py

app.py

@@ -73,6 +73,7 @@ disease_dict = {
 
 # Function to prepare data
 def prepare_data(df):
+    """Prepares data for training/testing."""
     X = df.iloc[:, :-1]  # Features
     y = df.iloc[:, -1]   # Target
     label_encoder = LabelEncoder()