python下的元组功能

一.元组的创建

元组(tuple): 不可变数据类型
元组内可以存储任意数据类型

 t = (1,2.3,True,'westos')

t1 = ([1,2,3],4)

t2 = ('westos',)

二.元组的特性

users = ('root','westos','redhat')
passwds = ('123','456','789')

索引 切片

print(users[0])
print(users[-1])
print(users[1:])
print(users[:-1])
print(users[::-1])

重复

print(users * 3)

连接

print(passwds + ('012','230'))

成员操作符

print('redhat' in users)
print('redhat' not in users)

迭代 （遍历）

for user in users:
    print(user)

for index,user in enumerate(users):
    print('第%d个用户: %s' %(index+1,user))

for user,passwd in zip(users,passwds):
    print(user,':',passwd)