This is for pandas

pd6.py

import pandas as pd

#
data = pd.DataFrame({
    "name":["Amy", "Bob", "Chole"],
    "score":[100, 80, 69]
})

#1.計算三位學生的成績平均值
score = data["score"]
print("成績平均值:", score.mean())

#2.在欄位中新增一欄,內容為學生的操行成績
data["grade"] = ["C", "A", "B+"]
print(data)

#打印出
"""
成績平均值: 83.0
    name  score grade
0    Amy    100     C
1    Bob     80     A
2  Chole     69    B+
"""