数据分类:录入若千名同学的姓名和成绩，把高于平均分的和低于平均分的分成两个部分然后输出。用python

可以使用Python中的列表和循环语句来实现这个任务。下面是一个简单的示例代码：

# 定义一个空列表用于存储学生姓名和成绩
students = []

# 录入学生信息
while True:
    name = input("请输入学生姓名：")
    if not name:
        break
    score = float(input("请输入学生成绩："))
    students.append({'name': name, 'score': score})

# 计算平均分
total_score = 0
for student in students:
    total_score += student['score']
avg_score = total_score / len(students)

# 分类输出
high_score_students = []
low_score_students = []
for student in students:
    if student['score'] >= avg_score:
        high_score_students.append(student)
    else:
        low_score_students.append(student)

print("高于平均分的学生：")
for student in high_score_students:
    print(student['name'], student['score'])

print("低于平均分的学生：")
for student in low_score_students:
    print(student['name'], student['score'])

此代码需要用户输入每个学生的姓名和成绩，然后计算平均分并将学生分类为高于平均分和低于平均分。最后，程序输出两个列表，分别包含高于平均分和低于平均分的学生姓名和成绩。