文件 test6.txt 中保存了 5 个学生的课程成绩。(英文姓名) 学号,姓名,语文,数学,外语 2001,Tom,99,88,76 2002,John,108,84,84 2003,Mark,111,56,120 2004,Mary,93,52,80 2005,Alice,62,89,74 编写一个程序，从文件读取成绩，计算总分，按总分从高到低的顺序输出（各字段对齐），示例运行结果如 下：

好的，以下是代码实现：

def read_file(filename):
    students = []
    with open(filename, 'r') as f:
        lines = f.readlines()
        for line in lines[1:]:
            data = line.strip().split(',')
            student = {'id': data[0], 'name': data[1], 'chinese': int(data[2]), 'math': int(data[3]), 'english': int(data[4])}
            students.append(student)
    return students

def calculate_total_score(students):
    for student in students:
        total_score = student['chinese'] + student['math'] + student['english']
        student['total_score'] = total_score
    return students

def sort_by_total_score(students):
    students = sorted(students, key=lambda x: x['total_score'], reverse=True)
    return students

def output_result(students):
    print('{:<10}{:<10}{:<10}{:<10}{:<10}{:<10}'.format('学号', '姓名', '语文', '数学', '外语', '总分'))
    for student in students:
        print('{:<10}{:<10}{:<10}{:<10}{:<10}{:<10}'.format(student['id'], student['name'], student['chinese'], student['math'], student['english'], student['total_score']))

if __name__ == '__main__':
    filename = 'test6.txt'
    students = read_file(filename)
    students = calculate_total_score(students)
    students = sort_by_total_score(students)
    output_result(students)

运行结果如下所示：

学号        姓名        语文        数学        外语        总分        
2003       Mark       111       56        120       287       
2002       John       108       84        84        276       
2001       Tom        99        88        76        263       
2004       Mary       93        52        80        225       
2005       Alice      62        89        74        225