python-009基本数据类型常用功能（详解）
2021-01-23 01:15
标签：int none div 参数 code count one center 详解 基本数据类型常用功能：数字 intn1 = 2n2 = 3print (n1 + n2)print (n1.__add__(n2)) python-009基本数据类型常用功能（详解） 标签：int none div 参数 code count one center 详解 原文地址：https://www.cnblogs.com/bigdata-6/p/12885957.html 1 基本数据类型常用功能：
2 数字 int
3 n1 = 2
4 n2 = 3
5 print (n1 + n2)
6 print (n1.__add__(n2))
7
8
9 # 获取二进制的最短位数
10 # i = 4
11 # ret = i.bit_length()
12 # print (ret)
13
14 字符串 str
15 1.capitalize
16 a1 = ‘alex‘
17 rex = a1.capitalize()
18 print (rex)
19 2.center(self, width, fillchar=None)
20 width：总长度；fillchar：空白处填充内容
21 a1 = ‘alex‘
22 rex = a1.center(20, ‘*‘)
23 print (rex)
24
25 3.count：查看子序列的个数
26 a1 = ‘alex is fskfdj‘
27 rex = a1.count(‘s‘)
28 print (rex)
29 4.指定范围内，某个值出现的次数
30 a1 = ‘alex is fskfdj‘
31 rex = a1.count(‘f‘,0,12)
32 print (rex)
33
34 5.endswith:是否以 ***结束
35 a1 = ‘alex‘
36 rex = a1.endswith(‘x‘)
37 print (rex)
38 6.从0开始，小于2的值
39 a1 = ‘alex‘
40 rex = a1.endswith(‘l‘,0,2)
41 print (rex)
42
43 7.find：寻找子序列的位置，如果没有找到，返回-1
44 a1 = ‘alex‘
45 rex = a1.find(‘g‘)
46 print (rex)
47
48 8.format：字符串格式化，动态参数
49 a1 = ‘helle {0} ,age (1)‘
50 print (a1)
51 # {0}，{1} 是占位符
52 new1 = a1.format("alex",19)
53 print (new1)
# 获取二进制的最短位数# i = 4# ret = i.bit_length()# print (ret)
字符串 str1.capitalizea1 = ‘alex‘rex = a1.capitalize()print (rex)2.center(self, width, fillchar=None) width：总长度；fillchar：空白处填充内容a1 = ‘alex‘rex = a1.center(20, ‘*‘)print (rex)
3.count：查看子序列的个数a1 = ‘alex is fskfdj‘rex = a1.count(‘s‘)print (rex)4.指定范围内，某个值出现的次数a1 = ‘alex is fskfdj‘rex = a1.count(‘f‘,0,12)print (rex)
5.endswith:是否以 ***结束a1 = ‘alex‘rex = a1.endswith(‘x‘)print (rex)6.从0开始，小于2的值a1 = ‘alex‘rex = a1.endswith(‘l‘,0,2)print (rex)
7.find：寻找子序列的位置，如果没有找到，返回-1a1 = ‘alex‘rex = a1.find(‘g‘)print (rex)
8.format：字符串格式化，动态参数a1 = ‘helle {0} ,age (1)‘print (a1)# {0}，{1} 是占位符new1 = a1.format("alex",19)print (new1)
布尔型 bool列表 list元祖 tuple字典 dict
下一篇：python邮件和网络的简单使用
文章标题：python-009基本数据类型常用功能（详解）
文章链接：http://soscw.com/index.php/essay/45684.html