python3学习笔记---hzh

doraemon · 发表于 2024-5-26 18:32:52

本帖最后由 doraemon 于 2024-5-26 22:47 编辑

学习笔记11

doraemon · 发表于 2024-5-27 20:31:23

Puthon的基本数据类型
Numder ; 数字

整数小数    整数：int    浮点数：float

整数浮点数

其他语言：单精度 (float)  双精度 (double)
其他语言： short  int  long

doraemon · 发表于 2024-5-29 21:47:15

本帖最后由 doraemon 于 2024-6-1 13:24 编辑

>>>type([1,2,3,4,5,6,])<class'list'>
>>>tupe(["hello","world",1,9])
<class'list'>
>>>["hello","world",1,9,True,False]
[''hello,'world',1,9,True,False]
>>>type([1,2],[3,4],[True,False])
<class'list'>
>>>嵌套列表

doraemon · 发表于 2024-6-13 22:34:25

type([1,2,3,4,5,6])
<class 'list'>
type(["hello","world"])
<class 'list'>
type(["hello","world",1,9])
<class 'list'>
type(["hello","world",1,9,True,False])
<class 'list'>
type([[1,2],[3,4],[True,False]])
<class 'list'>
二维数组

doraemon · 发表于 2024-6-13 22:56:26

Python 3.12.4 (tags/v3.12.4:8e8a4ba, Jun 6 2024, 19:30:16) [MSC v.1940 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license()" for more information.
["新月打击","苍白之瀑","月之降临","月神冲刺"][0]
'新月打击'
["新月打击","苍白之瀑","月之降临","月神冲刺"][3]
'月神冲刺'
["新月打击","苍白之瀑","月之降临","月神冲刺"][3]
'月神冲刺'
["新月打击","苍白之瀑","月之降临","月神冲刺"][2:]
['月之降临', '月神冲刺']
["新月打击","苍白之瀑","月之降临","月神冲刺"][:2]
['新月打击', '苍白之瀑']
["新月打击","苍白之瀑","月之降临","月神冲刺"][0:2]
['新月打击', '苍白之瀑']
["新月打击","苍白之瀑","月之降临","月神冲刺"][-1:]
['月神冲刺']

doraemon · 发表于 2024-6-14 23:09:18

doraemon 发表于 2024-6-13 22:56
Python 3.12.4 (tags/v3.12.4:8e8a4ba, Jun 6 2024, 19:30:16) [MSC v.1940 64 bit (AMD64)] on win32
Ty ...

(1,2,3,4,5)
(1, 2, 3, 4, 5)
(1,'-1',True)
(1, '-1', True)
(1,2,3,4)[0]
1
(1,2,3,4)[0:2]
(1, 2)
(1,2,3)+(4,5,6)
(1, 2, 3, 4, 5, 6)
(1,2,3)*3
(1, 2, 3, 1, 2, 3, 1, 2, 3)

doraemon · 发表于 2024-6-14 23:12:44

doraemon 发表于 2024-6-14 23:09
(1,2,3,4,5)
(1, 2, 3, 4, 5)
(1,'-1',True)

type((1,2,3))
<class 'tuple'>
type(1)
<class 'int'>
type([1,2,3])
<class 'list'>
type('hello')
<class 'str'>
type((1))
<class 'int'>
type(('hello'))
<class 'str'>

doraemon · 发表于 2024-6-14 23:15:56

doraemon 发表于 2024-6-14 23:12
type((1,2,3))

type(1)

type((1))
<class 'int'>
(1+1)*2
4
type((1))
<class 'int'>
type(1)
<class 'int'>
(1,2,3)
(1, 2, 3)
(1)
1
(1,)
(1,)
type((1,))
<class 'tuple'>

doraemon · 发表于 2024-6-14 23:39:35

本帖最后由 doraemon 于 2024-6-14 23:41 编辑

doraemon 发表于 2024-6-14 23:15
type((1))

(1+1)*2

int ;国际性组织（International organizations）；整数（integer，编程语言中的数据类型）；感叹词(interjection的缩写)                                                                                                                                                                                        float ;v. 浮动；漂浮；提出，提请考虑（想法或计划）；（使货币汇率）自由浮动；使漂流；飘动；飘移；（公司或企业）发行（股票）上市；轻盈走动
n.浮子；(学游泳用的)浮板；彩车；鱼漂；（商店的）备用零钱；加冰激凌的饮料          复数：floats第三人称单数：  floats现在进行时：  floating过去式：  floated过去分词：  floated
bool n.布尔；<英方>弯曲件
str abbr.(=submarine thermal reactor)潜水艇用热中子反应堆
list n.列表；清单；名单；目录；一览表；(船的)倾斜
v.(按某次序)把…列表，列清单，拟订清单; 列举; （向一侧）倾斜; (被)列入销售清单，列入价目表; 把…列入一览表
tuple  n.元组；元组，数组
单词意思  以上都是

doraemon · 发表于 2024-6-14 23:51:04

doraemon 发表于 2024-6-14 23:39
int ;国际性组织（International organizations）；整数（integer，编程语言中的数据类型）；感叹词(inte ...

type([1])
<class 'list'>
int,float,bool,str,list,tuple
(<class 'int'>, <class 'float'>, <class 'bool'>, <class 'str'>, <class 'list'>, <class 'tuple'>)
str list tuple 序列
'hello world'[2]
[1,2,3][2]
3
[1,2,3,4,5][0:3]
[1, 2, 3]
[1,2,3,4,5][-1:]
[5]
"hello world"[0:8:2]
'hlow'

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