หนังที่ได้ 3 ดาว และ 4 ดาว ชื่ออะไรคะ?
What are the names of movies that get 3 star and 4 star?
df1 = pd.DataFrame(columns=['mID', 'stars']); df2 = pd.DataFrame(columns=['title', 'mID'])
df2[df2['mID'].isin(df1[df1['stars'] == '3']['mID']) & df2['mID'].isin(df1[df1['stars'] == '4']['mID'])]['title']