print('----------------编码编码练习1----------------------')
s1='太白'
b1=s1.encode('gbk')
print(b1) #b'\xcc\xab\xb0\xd7'
s2=b1.decode('gbk')
b2=s2.encode('utf-8')
print(b2) #b'\xe5\xa4\xaa\xe7\x99\xbd'
print('----------------练习2----------------------')
s1='alex'
b1=s1.encode('gbk')
s2=b1.decode('utf-8')
print(s2)#alex
print('----------------基础数据类型补充内容----------------------')
s1='taiBAI'
print(s1.capitalize()) #Taibai 首字母大写，其余全部小写
print(s1.swapcase()) #TAIbai 大小写翻转
print(s1.upper()) #TAIBAI 全部大写
print(s1.lower()) #taibai 全部小写
msg='taibai say hello'
print(msg.title()) #Taibai Say Hello 每个单词的首字母大写
msg1='taibai 1say h2e3ll0o5'
print(msg1.title()) #Taibai 1Say H2E3Ll0O5 每个非数字首字母大写
s1='barry'
print(s1.center(20,'*')) #*******barry******** 居中并填充
s2='barryaabb'
print(s2.find('b')) #0 通过元素找索引，找到第一个就返回，找不到就返回-1
print(s2.find('r'))#2
print(s2.find('k'))#-1
print(s2.index('b'))#0
# print(s2.index('k'))#报错 通过元素找索引，找到第一个就返回，找不到就报错
tu1=(2,3,4)
#元组中如果tu2=(2,)
tu3=(2)
tu4=('太白')
tu5=([1,2,3])
print(tu1,type(tu1)) #(2, 3, 4) <class 'tuple'>
print(tu2,type(tu2)) #(2,) <class 'tuple'>
print(tu3,type(tu3)) #2 <class 'int'>
print(tu4,type(tu4)) #太白 <class 'str'>
print(tu5,type(tu5)) #[1, 2, 3] <class 'list'>只有一个元素，并且没有逗号，那么他不是元组，他与该元素的数据类型一致
tu=(1,2,3,4,3,3,2,2,3)
print(tu.count(3)) #4 计数
tu=('太白','小甲鱼','太白')
print(tu.index('太白')) #0 根据元素找索引
l1=['太白','123','女神','大壮']
print(l1.index('大壮'))#3
print(l1.count('大壮'))#1
l2=[5,4,3,7,8,9,1,6]
l2.sort()
print(l2) #[1, 3, 4, 5, 6, 7, 8, 9] 从小到大
l2.sort(reverse=True)
print(l2) #[9, 8, 7, 6, 5, 4, 3, 1] 从大到小
l2.reverse()
print(l2) #[6, 1, 9, 8, 7, 3, 4, 5] 翻转
l1=[1,2,3]
l2=['太白','123','女神']
print(l1+l2) #[1, 2, 3, '太白', '123', '女神']
l3=l1*3
print(l3) #[1, 2, 3, 1, 2, 3, 1, 2, 3]
l1 = [11, 22, 33, 44, 55]
for i in l1:
print(i) #11 22 33 44 55 返回元素
l1 = [11, 22, 33, 44, 55]
for i in range(len(l1)):
print(i) #0 1 2 3 4 返回索引
l1 = [11, 22, 33, 44, 55] #请把索引为奇数对应的元素删除（不能一个一个删除，此l1只是举个例子，里面的元素不定）。
del l1[1::2]
print(l1) #[11, 33, 55]
new_l1=[]
for index in range(len(l1)):
if index%2==0:
new_l1.append(l1[index])
l1=new_l1
print(l1) #[11, 33, 55]
l1 = [11, 22, 33, 44, 55]
# for index in range(len(l1)-1,-1,-1):
# if index%2==1:
# l1.pop(index)
# print(l1) #[11, 33, 55]
dic = {'name': '太白', 'age': 18}
dic.update(hobby='运到',hight='175')
'}print(dic) #{'name': '太白', 'age': 18, 'hobby': '运到', 'hight':'
dic = {'name': '太白', 'age': 18}
dic.update(name='太白金星')
print(dic) #{'name': '太白金星', 'age': 18}
dic = {'name': '太白', 'age': 18}
dic.update([(1,'a'),(2,'b'),(3,'c'),(4,'d')])
print(dic) #{'name': '太白', 'age': 18, 1: 'a', 2: 'b', 3: 'c', 4: 'd'}
dic1={'name':'xiaojiayu','age':22,'sex':'男'}
dic2={'name':'alex','age':22,'weight':75}
dic1.update(dic2) #更新，有则覆盖，无则增加
print(dic1) #{'name': 'alex', 'age': 22, 'sex': '男', 'weight': 75}
dic=dict.fromkeys('abc',100)
print(dic) #{'a': 100, 'b': 100, 'c': 100}
dic=dict.fromkeys([1,2,3], )
print(dic) #{1: None, 2: None, 3: None}
dic=dict.fromkeys([1,2,3],' ')
print(dic) #{1: ' ', 2: ' ', 3: ' '}
dic=dict.fromkeys([1,2,3],[])
dic[1].append(666)
print(dic) #{1: [666], 2: [666], 3: [666]}
dic={'k1':'太白','k2':'barry','k3':'白白','age':18}
# for key in range(len(dic)):
# if 'k' in key:
# dic.pop(key)
# print(key)
dic={'k1':'太白','k2':'barry','k3':'白白','age':18}
l1=[]
for key in dic:
if 'k' in key:
l1.append(key)
for i in l1:
dic.pop(i)
print(dic) #{'age': 18}
for key in list(dic.keys()):
print(key) #k1 k2 k3 age
dic={'k1':'太白','k2':'barry','k3':'白白','age':18}
for key in list(dic.keys()):
if 'k' in key:
dic.pop(key)
print(dic) #{'age': 18}
#str---->list
# s1='alex wusir taibai'
# l1=s1.split()
# print(l1) #['alex', 'wusir', 'taibai']
#list--->str 此list中的元素全部是str类型
# l1=['alex', 'wusir', 'taibai']
# s2=' '.join(l1)
# print(s2) #alex wusir taibai
#tuple--->list
# l1=[1,2,3]
# tu1=tuple(l1)
# print(tu1) #(1, 2, 3)
#list--->tuple
# tu2=(0,1,2)
# l1=list(tu2)
# print(l1) # [0, 1, 2]
#dict-->list
# dic1={'name':'alex','age':1000}
# l1=list(dic1)
# print(l1) #['name', 'age']
set1={'alex',1,2,3}
set2={'alex','wusir'}
set3=set({1,2,3})
print(set1,set2) #{3, 1, 'alex', 2} {'alex', 'wusir'}
print(set3) #{1, 2, 3}
set1={'alex','wusir','ritian','egon','barry'}
set1.add('女神')
print(set1) #{'barry', 'alex', 'wusir', 'ritian', 'egon', '女神'}
set1.update('abc')
print(set1) #{'alex', 'barry', '女神', 'egon', 'a', 'b', 'c', 'wusir', 'ritian'}
set1.remove('alex')
print(set1)
set1.pop()
print(set1) #{'alex', 'barry', 'ritian', 'wusir'}
set1.clear()
print(set1) #set()
set1={'alex','wusir','ritian','egon','barry'}
del set1
print(set1)
set1={1,2,3,4,5,6}
set2={5,6,7,8,9,10}
print(set1&set2) #{5, 6}
print(set1.intersection(set2)) #{5, 6}
print(set1^set2) #{1, 2, 3, 4, 7, 8, 9, 10}
print(set1.symmetric_difference(set2)) #{{1, 2, 3, 4, 7, 8, 9, 10}
print(set1 | set2) #{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
print(set1.union(set2)) #{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}
print(set1-set2) #{1, 2, 3, 4}
print(set1.difference(set2)) #{1, 2, 3, 4}
set1={1,2,3}
set2={1,2,3,4,5}
print(set1<set2) #True
print(set1.issubset(set2))
set1={1,2,3}
set2={1,2,3,4,5}
print(set2>set1) #True
print(set2.issuperset(set1)) ##True
set1=(1,23,3)
set3=frozenset(set1)
print(set3) #frozenset({1, 3, 23})
l1=[1,2,3]
l2=l1.copy()
l1.append(666)
print(l1,l2) #[1, 2, 3, 666] [1, 2, 3]
l1=[1,2,3,[22,]]
l2=l1.copy()
l1.append(666)
print(l1,l2) #[1, 2, 3, [22], 666] [1, 2, 3, [22]]
l1=[1,2,3,[22,]]
l2=l1.copy()
l1[-1].append('taibai')
print(l1,l2) #[1, 2, 3, [22, 'taibai']] [1, 2, 3, [22, 'taibai']]
l1=[1,2,3,[22,]]
l2=l1.copy()
l1[-1].append('taibai')
print(l1,l2) #[1, 2, 3, [22, 'taibai']] [1, 2, 3, [22, 'taibai']]
print(id(l1),id(l2)) #2022479746696 2022479745864
print(id(l1[-1]),id(l2[-1])) #2022479746696 2022479745864
l1=[1,2,3,4,['alex']]
l2=l1[::]
# l1.append(666)
# print(l2) #[1, 2, 3, 4, ['alex']]
l1[-1].append(666)
print(l2) #[1, 2, 3, 4, ['alex', 666]]