python函数！，。

1.用def定义函数求数列平均值
2.用def定义函数成绩等级排序 并计算出每个等级人数

from random import randint

def average(a,b):
    """求列表a到b的平均值"""
    average = sum(range(a,b))/len(range(a,b))
    print(f"平均值是{average}")
average(1,25)

def chengji(n):
    
    all_chengji=[]
    jige = []
    flag = 0
    while flag <= n:
        chengji = randint(1,100)
        all_chengji.append(chengji)
        flag += 1

    for i in all_chengji:
        if i >= 60:
            jige.append(i)

    print(f"{n}人的成绩是：{all_chengji}")
    print(f"及格（高于60分）的人数是：{len(jige)}人")
chengji(11)