10.python内置数据--元组

 1 >>> t = (1,3,6,7,3,7,12)
 2 >>> t
 3 (1, 3, 6, 7, 3, 7, 12)
 4 >>> type(t)
 5 <class ‘tuple‘>
 6 >>> t1 = (1)
 7 >>> type(t1)
 8 <class ‘int‘>
 9 >>> t1 = (1,)
10 >>> type(t1)
11 <class ‘tuple‘>
12 >>> t1
13 (1,)
14 >>> t2 = (1,2,3)*3
15 >>> t2
16 (1, 2, 3, 1, 2, 3, 1, 2, 3)
17 >>>

 1 >>> t = tuple(range(5))
 2 >>> t
 3 (0, 1, 2, 3, 4)
 4 >>> t[1]
 5 1
 6 >>> t[1] = 4
 7 Traceback (most recent call last):
 8   File "<stdin>", line 1, in <module>
 9 TypeError: ‘tuple‘ object does not support item assignment
10 >>>

 1 >>> t = (1,5,[4,11,6],5,9)
 2 >>> t
 3 (1, 5, [4, 11, 6], 5, 9)
 4 >>> t[0] = 11
 5 Traceback (most recent call last):
 6   File "<stdin>", line 1, in <module>
 7 TypeError: ‘tuple‘ object does not support item assignment
 8 >>> t[2][0] = 8
 9 >>> t
10 (1, 5, [8, 11, 6], 5, 9)
11 >>>

 1 >>> from collections import namedtuple
 2 # 导入该模块
 3 >>> Point = namedtuple(‘_Point‘,‘x,y‘)
 4 # Point是类型，_Point是类名称，x与y可以理解成变量实例
 5 >>> type(Point)
 6 <class ‘type‘>
 7 # 可以看到Point是个类型
 8 >>> p1 = Point(11,22)
 9 >>> p1
10 _Point(x=11, y=22)
11 >>> p1.x
12 11
13 >>> p1.y
14 22
15 >>> Student = namedtuple(‘Student‘,‘name age‘)
16 >>> tom = Student(‘tom‘,20)
17 >>> jerry = Student(‘jerry‘,18)
18 >>> tom.name
19 ‘tom‘
20 >>> tom.age
21 20
22 >>>