tuple

###1. 创建元祖

>>> tup1 = ('Google', 'Runoob', 1997, 2000); >>> tup2 = (1, 2, 3, 4, 5 ); >>> type(tup2) <class 'tuple'> >>> type(tup1) <class 'tuple'> #特别注意：不需要括号也可以 >>> tup3 = "a", "b", "c", "d"; >>> type(tup3) <class 'tuple'>

??? note “注意” 元组使用小括号,元组的元素不能修改,元素用逗号隔开 元组中只包含一个元素时，需要在元素后面添加逗号，否则括号会被当作运算符使用

###2. 访问元组

#用法和list一样 >>>tup1 = ('Google', 'Runoob', 1997, 2000) >>> tup1[0] 'Google' >>> tup1[0:2] ('Google', 'Runoob') >>> tup1[:] ('Google', 'Runoob', 1997, 2000) >>> tup1[::-1] (2000, 1997, 'Runoob', 'Google')

###3. 删除元组

#不允许删除元祖元素，可以删除整个元组 >>> tup1 = ('Google', 'Runoob', 1997, 2000) >>> tup1.remove() Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'tuple' object has no attribute 'remove' >>> del tup1 >>> tup1 Traceback (most recent call last): File "<stdin>", line 1, in <module> NameError: name 'tup1' is not defined

###4. 元组更新

#使用截取，添加的方式 >>> tup1=(1,2,3,4,5) >>> tup1=tup1[0:2]+tup1[4:5] >>> tup1 (1, 2, 5) >>>tup2=(7,8) >>>tup2=tup1[:] + tup2[:] >>tup2 (1, 2, 5, 7, 8)

###5. 元组内置函数 ####5.1 计算元组元素个数

>>> tuple1 = ('Google', 'Runoob', 'Taobao') >>> len(tuple1) 3

####5.2 元组中元素最大值

>>> tuple2 = ('5', '4', '8') >>> max(tuple2) '8'

####5.3 元组中元素最小值

>>> tuple2 = ('5', '4', '8') >>> min(tuple2) '4'

####5.4 列表转换为元组

>>> list1= ['Google', 'Taobao', 'Runoob', 'Baidu'] >>> tuple1=tuple(list1) >>> tuple1 ('Google', 'Taobao', 'Runoob', 'Baidu')