''
集合：可变的数据类型，他里面的元素必须是不可变的数据类型，无序，不重复。
{}
'''
# set1 = set({1,2,3})
# set2 = {1,2,3,[2,3],{'name':'alex'}} # 错的 集合和字典是可变数据类型
# print(set1)
# print(set2)
# set1 = {'alex','wusir','ritian','egon','barry',}
#增
#add
# set1.add('女神')
# print(set1)
#update #迭代增加
# set1.update('abc')
# print(set1)
#删除 # set1.pop() # 随机删除
# print(set1.pop()) # 有返回值
# print(set1) # set1.remove('alex') # 按元素
# print(set1) #空字典{} 空集合set()
# set1.clear()
# print(set1) # set() # del set1 #删除集合
# print(set1) #查
# for i in set1:
# print(i) # set1 = {1,2,3,4,5}
# set2 = {4,5,6,7,8}
# set3 = set1 & set2 #交集
# print(set3) # {4, 5}
# print(set1.intersection(set2)) # {4, 5} # set1 = {1,2,3,4,5}
# set2 = {4,5,6,7,8}
# print(set1 | set2) # {1, 2, 3, 4, 5, 6, 7,8} #并集
# print(set2.union(set1)) # {1, 2, 3, 4, 5, 6, 7} # set1 = {1,2,3,4,5}
# set2 = {4,5,6,7,8}
# print(set1 ^ set2) # {1, 2, 3, 6, 7, 8}
# print(set1.symmetric_difference(set2)) # {1, 2, 3, 6, 7, 8} # set1 = {1,2,3,4,5}
# set2 = {4,5,6,7,8}
# print(set1 - set2) # {1, 2, 3} #差集
# #set1独有的
# print(set1.difference(set2)) # {1, 2, 3} # set1 = {1,2,3,}
# set2 = {1,2,3,4,5,6}
#
# print(set1 < set2)
# print(set1.issubset(set2)) # 这两个相同，都是说明set1是set2子集。 # print(set2 > set1)
# print(set2.issuperset(set1)) # 这两个相同，都是说明set2是set1超集。 #去重
# li = [1,2,33,33,2,1,4,5,6,6]
# set1 = set(li)
# # print(set1)
# li = list(set1)
# print(li)
# s1 = {1,2,3}
# print(s1,type(s1)) # s = frozenset('barry')
# print(s,type(s))
# for i in s:
# print(i)
深浅copy
# 赋值运算
# l1 = [1,2,3]
# l2 = l1
# l1.append('a')
# print(l1,l2) #copy
# l1 = [1,2,3]
# l2 = l1.copy()
# print(l1,l2)
# print(id(l1),id(l2))
# l2.append('a')
# print(l1,l2) # l1 = [1,2,[4,5,6],3]
# l2 = l1.copy()
#
# print(l1,id(l1))
# print(l2,id(l2))
# l1.append('a')
# print(l1,l2)
# l1[2].append('a')
# print(l1,l2)
# print(id(l1[2]))
# print(id(l2[2]))
import copy
# l1 = [1,2,[4,5,6],3]
# l2 = copy.deepcopy(l1)
# print(l1,id(l1))
# print(l2,id(l2))
# l1[2].append('a')
# print(l1,l2) # l1 = [1,[1],2,3,4]
# l2 = l1
# # l1[1].append('a')
# # l2 的结果是什么?
#
#
# print(l1,id(l1))
# print(l2,id(l2))
# print(l1[1] is l2[1])
enumerate 用法
# li = ['alex','taibai','wusir','egon']
# for i in li:
# print(li.index(i),i) # for index,i in enumerate(li,1):
# print(index,i)