Python problem. Please find the eror and solve it [closed]

db.execute(
            "INSERT INTO stocks (userID, symbol, shares, price, operation) VALUES (?, ?, ?, ?, ?)",
            session["user_id"],
            symbol.upper(),
            -shares,
            price,
            "sell",
        )

        db.execute(
            "UPDATE users SET cash = cash + ? WHERE id = ?",
            shares_value,
            session["user_id"],
        )

        flash("Sold!")
        return redirect("/")
    else:
        stocks = db.execute(
            "SELECT symbol FROM stocks WHERE userID = ? GROUP BY symbol",
            session["user_id"],
        )
        return render_template("sell.html",