Python_求列表s=[]求 元素个数，最大值，最小值，元素和，平均值

#编写程序，求列表s=[]求 元素个数，最大值，最小值，元素和，平均值
def choose(s):
    sum = 0
    all = 0
    maxnum = max(s)
    minnum = min(s)
    for i in s:
        sum = sum + 1 #元素个数
        all = all + i
    average = all / sum
    print(str("元素个数{0}，最大值{1}，最小值{2}，元素和{3}，平均值{4}").format(sum, maxnum, minnum, all, average))
def main():
    s = [9,7,8,3,2,1,55,6]
    choose(s)
main()