python笔记 - 元组tuple（七）

元组中元素不能修改，用小括号()表示，(1, 2, “python”)

>>> tuple = ()
>>> type(tuple)

元组中只包含一个元素时，需要在元素后面添加逗号，否则括号会被当做运算符使用

>>> tuple = (50)
>>> type(tuple)

>>> tuple = (50,)
>>> type(tuple)

使用下标索引来访问元组中的值

>>> tuple = (50, 30 , 10)
>>> tuple[2]
10

元组中的元素值不能修改，但可以对元组进行连接组合

>>> tup1 = (12, 34.56);
>>> tup2 = ('abc', 'xyz')
>>> tup1 + tup2
(12, 34.56, 'abc', 'xyz')

元组中的元素值不能删除，但可以使用del语句来删除整个元组

>>> tup = (1, 3, 5)
>>> del tup[1]
Traceback (most recent call last):
  File "", line 1, in 
TypeError: 'tuple' object doesn't support item deletion
>>> del tup
>>> tup
Traceback (most recent call last):
  File "", line 1, in 
NameError: name 'tup' is not defined

>>> tup = (1, 3, 5)
>>> tup[::-1]
(5, 3, 1)
>>> tup[1:2]
(3,)

max(tuple)
min(tuple)

>>> tup = (1, 3, 5)
>>> max(tup)
5
>>> min(tup)
1

list(tuple)
tuple(list)

>>> tup = (1, 3, 5)
>>> li = list(tup)
>>> li
[1, 3, 5]
>>> tuple(li)
(1, 3, 5)

>>> tup = (1, 3, 5)
>>> a, b, c = tup
>>> print(a, b, c)
1 3 5