Enhance lineup optimization in app.py: Added constraint to ensure exactly 9 players are selected in the lineup, improving the accuracy of the optimization function.

app.py

@@ -141,6 +141,9 @@ def optimize_lineup(player_data):
     
     # Constraint: Salary cap
     prob += pulp.lpSum([players[row['Player']] * row['Salary'] for idx, row in player_data.iterrows()]) <= 50000
+
+    # Constraint: 9 players
+    prob += pulp.lpSum([players[row['Player']] for idx, row in player_data.iterrows()]) == 9
     
     # Position constraints
     qbs = player_data[player_data['Position'] == 'QB']['Player'].tolist()