窝的Python学习之路002 元组

元组列表 非常相似,但元组不能 插入删除 元素。

创建和访问一个元组

>>> tuple1 = (1, 2, 3, 4, 5, 6, 7)
>>> tuple1
(1, 2, 3, 4, 5, 6, 7)
>>> tuple1[0]
1
>>> tuple1[:5]
(1, 2, 3, 4, 5)
>>> tuple2 = tuple1[:]
>>> tuple2
(1, 2, 3, 4, 5, 6, 7)

元组的核心是逗号,,不是括号

>>> temp = (1)
>>> temp
1
>>> type(temp)


>>> tuple3 = 2, 3, 4, 5
>>> tuple3
(2, 3, 4, 5)
>>> type(tuple3)


>>> tuple4 = ()
>>> type(tuple4)


>>> tuple5 = (1,)
>>> type(tuple5)


>>> tuple6 = 1,
>>> type(tuple6)

更新元组:切片方法

>>> temp = (1,2,3,5,6)
>>> temp = temp[:3] + (4,) + temp[3:]
>>> temp
(1, 2, 3, 4, 5, 6)

删除元组中的一个元素:切片方法

不举例了

删除整个元组:del()

>>> temp
(1, 2, 3, 4, 5, 6)
>>> del temp
>>> temp
Traceback (most recent call last):
  File "", line 1, in 
    temp
NameError: name 'temp' is not defined

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