import random
 
lsGiftIn = [['Jack','apple'],['June','ball'],['Mary','card'],['Duke','doll'],['James','egg'],['Tina','flute'],['Tom','coffee']]#存储参与者的姓名和自己带来的礼物
lsGiftOut = []#存储交换后的结果
n = len(lsGiftIn)#参与人数
gifts = [i[1] for i in lsGiftIn]#未分配出去的礼物
for x in range(n):
  flag = 0
  person = lsGiftIn[x][0]
  myGift = lsGiftIn[x][1]
  if myGift in gifts:
    flag = 1
    gifts.remove(myGift)
  getGift = random.choice(gifts)#随机分配礼物
  lsGiftOut.append([person,getGift])
  gifts.remove(getGift)
  if flag:
    gifts.append(myGift)
 
print(lsGiftOut)

dictGiftIn = {'Jack':'apple','Peter':'beer','Tom':'card','Duke':'doll','Mary':'pineapple','James':'flute','Tina':'coffee'}
dictGiftOut = {}
persons = list(dictGiftIn.keys())
for p in persons:
  flag = 0#标记自己带来的礼物是否还未分配出去
  if p in dictGiftIn:
    flag = 1
    myGift = dictGiftIn.pop(p)#如果自己带来的礼物还未分配，则去掉该礼物
  getGift = dictGiftIn.popitem()#随机返回并移除一对key-value值
  dictGiftOut[p] = getGift[1]#得到的礼物
  if flag:
    dictGiftIn[p] = myGift#将自己的礼物添到未分配礼物中
 
print(dictGiftOut)#输出礼物分配情况