python 数组的计算（pandas）

import pandas as pd
dict = {"a":[10,20,30],"b":[40,50,60],"c":[40,60,80]}
df = pd.DataFrame(dict,index=["语文","数学","英语"])
print(df)
#总分
print(df.sum())
#平均分
print(df.mean())

#"语文"的总分
print("a",df.iloc[0].sum())