题解 | #统计每个学校的答过题的用户的平均答题数#

niukele的位置用list.index()获取

for name in guest_list:
    print('%s, do you want to come to my celebration party?'%name)
print()
guest_list.insert(0, 'GURR')
guest_list.insert(guest_list.index('Niu Ke Le'), 'Niumei')
guest_list.append('LOLO')
for name in guest_list:
    print('%s, thank you for coming to my celebration party!'%name)