啥数据类型set补充、深浅拷贝与函数

#s1 = {1,2,3,1}
"""
s2 = ([2,5,6])
print(s1)
s1.add(5)      #添加元素"5"
print(s1)
s3 = s1.difference(s2)     #返回一个s1中存在而不存在于s2的字典
print(s3)
"""
#s1.discard(1)    #删除元素"1"
#print(s1)
#s1.remove(3)      #
#print(s1)   

#s1.update([11, 2, 3])   #更新s1的元素，添加
#print(s1)

#s1.pop()         #删除元素，无序的，所以不知道删除谁，随机的
#print(s1)

#-------------------------分割线--------------------------
##s2 = {3,4,5,6}
#r1 = s1.intersection(s2)   # 取交集，并返回一个新的交集 r1={3,4}
#print(r1)

#s1.intersection_update(s2)  #取交集，并将s1更新为取交集的结果 s1={3,3}
#print(s1)

#s1.issubset(s2)
#print(s2)

 1 li = ["手机","电脑","鼠标垫","游艇"]
 for i,j in enumerate(li):
     print(i+1,j)

 num= input("num:")
 num = int(num)
 len_li = len(li)
 if num >0 and num < len_li:

     good = li[num-1]
     print(good)
 else:
     print("商品不存在")

--------------分割线-----------------

 asset_all = 1999
 car_list = []

 i1 = input('请输入总资产:')
 asset_all = int(i1)

 goods = [
     {"name":"电脑","price":1999},
     {"name":"鼠标","price":10},
     {"name":"游艇","price":20},
     {"name":"美女","price":998},
 ]

 for i in goods:
     print(i['name'],i['price'])

 while True:
     i2 = input('请输入商品：')
     if i2 == "y":
         break
     for j in goods:
         if j ['name'] == i2:
             car_list.append(j)

 print(car_list)
 all_price = 0
 for item in car_list:
     p = item['price']
     all_price = all_price + p
 print(asset_all,all_price)
 if all_price > asset_all:
     print('你个穷逼')
 else:
     print("购买成功")