019_求和_求平均_统计引导

import pandas as pd

if __name__ == '__main__':
    student = pd.read_excel("C:/Users/18124/Desktop/pandas/019_求和_求平均_统计引导/Students.xlsx", 
                            engine="openpyxl")
    print(student)

    # 求和 求平均值
    row_sum = student[["Test_1", "Test_2", "Test_3"]].sum(axis=1)        # 从左到右 axis=1
    row_mean = student[["Test_1", "Test_2", "Test_3"]].mean(axis=1)        # 从左到右 axis=1
    student["Total"] = row_sum
    student["Average"] = row_mean
    print(student)

    # 添加一列
    col_mean = student[["Test_1", "Test_2", "Test_3", "Total", "Average"]].mean()   # 求平均值
    col_mean["Name"] = "Summary"    # 增加名称
    student = student.append(col_mean, ignore_index = True) # 添加一列
    print(student)

    student.set_index("ID", inplace = True)
    print(student)

    student.to_excel("C:/Users/18124/Desktop/output.xlsx")