i = 0

sum = 0

list_num = []

while i <10:

ran_num = random.randint(1,20)

if ran_num not in list_num:

list_num.append(ran_num)

i+=1 #当条件满足的时候在将i+1,来控制循环次数

sum+=ran_num

print(list_num,len(list_num),'十个随机数的和是：%d' %sum )

print('-----------取出列表中最大值和最小值-------------')

min_num = list_num[0] #当list是空的时候不能这样写，会产生list index out of range

max_num = list_num[0]

for j in list_num:

if min_num > j: #这个位置不能这样写 if max_num < list_num[i]: 报错TypeError: '<' not supported between instances of 'list' and 'int'

min_num = j

if max_num < j:

max_num = j

print('最大值{}'.format(max_num),'最小值{}'.format(min_num))