ค้นหาชื่อผู้ใช้ที่ให้คะแนนสูงสุด
Find the name of the user who gave the highest rating.
df_review = pd.DataFrame(columns=['u_id', 'rating']); df_useracct = pd.DataFrame(columns=['name', 'u_id'])
df_review.loc[df_review['rating'].idxmax()]['u_id']