(八)元组

#######元组##########
#tuple
#元组中的元素不能被修改，不能被删除增加。是可迭代对象
# tu = (11,22,33,44,(112.33,),['awd'])
#1 索引
# v = tu[0]
# print(v)

#2 切片
# v = tu[2:4]
# print(v)

#3 for循环,k
# for i in tu:
#     print(i)

#字符串、列表、元组之间的转换
# s = 'abc'
# li = [123,'qwe']
# tu = (345,'rty',890,)
# v = str(tu)
# v1 = list(tu)
# v2 = tuple(s)
# v3 = tuple(li)
# print(v)
# print(v1)
# print(v2)
# print(v3)


#都是字符串类型的时候可以用join
# tu = ('345','rty','890',)
# v = ''.join(tu)
# print(v)

#可以使列表的extend方法，把元组加到列表后面。
# li = ['345','rty','890']
# li.extend((111,'222',333,))
# print(li)

#6 元组的一级元素不可以修改、删除、增加
# tu = (111,'aaaaa',('111',222),['333',44],123,)
# v = tu[3][0][0]
# print(v)
# tu[3][0]='W'
# print(tu)


#count() 获取出现次数

# index()