2021-2022学年高中信息技术浙教版（2019）必修1 数据与计算3.2.7 列表 课件-（31张PPT）

(共31张PPT)
3.2 Python程序设计
7、列表
python
>>>11st1
2,3,4,1,32
>>>1en(1ist1)
5
>>>max(list1)
32
>>>min (list1)
>>>sum(list1)
42
>>>import random
>>>random shuffle(list1)
>>>11st1
[32,2,3,1,4]
>>>1ist1=[5.6,4.5,3.3,13.2,4.8,34.33,34.0,45.45,99.993,11123]
>>>1ist1[8]
5,6
>>>1ist1[9]
11123
>>>1ist1[10]
raceback (most recent call last):
File ", line 1, in
ist1[10]
IndexError: list index out of range
>>>1ist1=[2,3,5,2,33,21
>>>1ist1[-1]
21
>>>1ist1[-1+1en(1ist1)]
21
>>>1ist1[-3]
2
>>>1ist1[-3+1en(1ist1)]
2
>>>1ist1=[2,3,5,7,9,1]
>>>1ist1[2:4]
[5,7]
>>>1ist1
2,3,5,2,33,21
>>>1ist1[:2]
>>>1ist1[e:2]
[2,3]
>>>1ist1[3:]
[2,33,21]
>>>1ist1[3:1en(1ist1)]
2,33,21
>>>1ist1[:2]
2,5,33
>>>1ist1=[2,3,5,2,33,21
>>>1ist1[1:-3]
[3,5]
>>>1ist1[1:-3+1en(1ist1)
3,5
>>>1ist1[-4:-2]
>>>1ist1[-4+1en(1ist1):-2+1en(1ist1)]
5,2
>>>1ist1=[2,3,5,2,33,21]
>>>1ist1[3:3]
>>>1ist1[2:18]
[5,2,33,21]
>>>1ist1[2:1en(1ist1)]
5,2,33,21
>>>1ist1=[2,3
>>>1ist2=[1,9]
>>>11st3=1ist1+1ist2
>>>1ist3
[2,3,1,9]
>>>11st4=3*11st1
>>>11st4
[2,3,2,3,2,3]
>>>1ist5=1ist1*3
>>>11st5
2,3,2,3,2,3]