从一个文件中计算平均值，并显示平均值超过90的学生的记录

def calculate_average(file_path):
    total_score = 0
    student_count = 0
    students_above_90 = []

    with open(file_path, 'r') as file:
        for line in file:
            student_data = line.strip().split(',')  # 假设数据以逗号分隔
            if len(student_data) != 2:
                continue  # 忽略无效记录

            student_name = student_data[0]
            score = float(student_data[1])

            total_score += score
            student_count += 1

            if score > 90:
                students_above_90.append(student_name)

    if student_count > 0:
        average = total_score / student_count
        print("平均值：", average)
    else:
        print("文件中没有有效的学生记录")

    if len(students_above_90) > 0:
        print("平均值超过90的学生记录：")
        for student in students_above_90:
            print(student)
    else:
        print("没有学生的平均值超过90")

# 调用示例
calculate_average("students.txt")