ขออุณหภูมิเซี่ยงไฮ้เดือนมกราคมหน่อยค่ะ
Give me the temperature of Shanghai in January.
df_city = pd.DataFrame(columns=['city_id', 'city']); df_temperature = pd.DataFrame(columns=['Jan', 'city_id'])
df_temperature[df_temperature['city_id']==df_city[df_city['city']=='Shanghai']['city_id'].values[0]]['Jan']