《零基础入门学习Python》13元组

Gabber

元组
0. 创建和访问一个元组
创建：
>>> tuple1 = (1,2,3,4,5)   #重点是 ',' 符号，即元组的标志符，例如列表的标配是'[ ]'
>>> tuple1 = (1,)             #创建1个元素的元组
>>> tuple1 = ()                 #创建1个空元组
>>> 8 * (8,)                         #重复操作符，得到(8，8，8，8，8，8，8，8)
访问：tuple1[1],tuple[:],tuple2=tuple1[:]  #通过下标或者切片的方式

1. 更新和删除一个分组
更新，使用切片的方式构成新元组
>>> temp = temp[:2]+('新元素'，)+temp[2:]    # '（）' 和'，'缺一不可
删除：
>>> del temp                #较少使用，元组没有标签指向的时候，内存将会被回收。回收机制。

2. 元组相关的操作符：拼接操作符 +，重复操作符 *，关系操作符<,> ,<=,>=，逻辑操作符and,or,not，成员操作符 in,not in

小明1201

Python 3.5.2 (v3.5.2:4def2a2901a5, Jun 25 2016, 22:01:18) [MSC v.1900 32 bit (Intel)] on win32
Type "copyright", "credits" or "license()" for more information.
>>> tuple1 = (1,2,3,4,5,6,7)
>>> tuple1
(1, 2, 3, 4, 5, 6, 7)
>>> tuple1[1]
2
>>> tuple1[5:]
(6, 7)
>>> tuple1 = (1,2,3,4,5,6,7,8,)
>>> type(tuple1)
<class 'tuple'>
>>> tuple1
(1, 2, 3, 4, 5, 6, 7, 8)
>>> tuple1[1]
2
>>> tuple1[5:]
(6, 7, 8)
>>> tuple1[:5]
(1, 2, 3, 4, 5)
>>> tuple2 =tuple1
>>> tuole2
Traceback (most recent call last):
  File "<pyshell#13>", line 1, in <module>
    tuole2
NameError: name 'tuole2' is not defined
>>> tuple2
(1, 2, 3, 4, 5, 6, 7, 8)
>>> tuple1[1]
2
>>> tuple1[1] = 3
Traceback (most recent call last):
  File "<pyshell#16>", line 1, in <module>
    tuple1[1] = 3
TypeError: 'tuple' object does not support item assignment
>>> temp = (1)
>>> temp
1
>>> type(temp)
<class 'int'>
>>> type (temp)
<class 'int'>
>>> temp2 = 2, 3, 4
>>> type(temp2)
<class 'tuple'>
>>> temp = ()
>>> type(temp)
<class 'tuple'>
>>> temp(1,)
Traceback (most recent call last):
  File "<pyshell#25>", line 1, in <module>
    temp(1,)
TypeError: 'tuple' object is not callable
>>> temp = (1,)
>>> type(temp)
<class 'tuple'>
>>> temp = 1,
>>> type(temp)
<class 'tuple'>
>>> 8 * (8)
64
>>> 8 * (8,)
(8, 8, 8, 8, 8, 8, 8, 8)
>>> temp = ('小明', '小花', '小强', '小李')
>>> temp
('小明', '小花', '小强', '小李')
>>> temp = temp[2:] + ('六六')+ temp[:2]
Traceback (most recent call last):
  File "<pyshell#36>", line 1, in <module>
    temp = temp[2:] + ('六六')+ temp[:2]
TypeError: can only concatenate tuple (not "str") to tuple
>>> temp = temp[2:] + ('六六',)+ temp[:2]
>>> temp
('小强', '小李', '六六', '小明', '小花')
>>> del temp
>>> temp
Traceback (most recent call last):
  File "<pyshell#40>", line 1, in <module>
    temp
NameError: name 'temp' is not defined
>>>

足迹

我忘了还有连接操作符和重复操作符