Python len函数 - Python零基础入门教程

你的名字 2022-08-29 15:59 137阅读 0赞

*  一.Python len 函数简介
 *  二.Python len 函数使用
 *  三.猜你喜欢

> 零基础 Python 学习路线推荐 : [Python 学习目录][Python] >> [Python 基础入门][Python 1]

在 [Python][Python 2] 中除了 [print 函数][print]之外，len 函数和 type 函数应该算是使用最频繁的 API 了，操作都比较简单。

## 一.Python len 函数简介 ##

返回对象的长度（项目数）参数可以是序列（例如\*\*[字符串 str][str]\*\* 、**[元组 tuple][tuple]** 、**[列表 list][list]** ）或集合（例如\*\*[字典 dict][dict]\*\* 、[集合 set][set] 或[冻结集合 frozenset][frozenset] ）,**语法如下：**

'''
    参数：
        s – 对象或者序列（例如字符串str、元组tuple、列表list）或集合（例如字典dict、集合set或冻结集合）
    
    返回值：返回长度(>=0)
    '''
    
    len(s)

## 二.Python len 函数使用 ##

# !usr/bin/env python
    # -*- coding:utf-8 _*-
    """
    @Author:猿说编程
    @Blog(个人博客地址): www.codersrc.com
    @File:Python len 函数.py
    @Time:2021/04/29 07:37
    @Motto:不积跬步无以至千里，不积小流无以成江海，程序人生的精彩需要坚持不懈地积累！
    
    """
    
    
    a = (1,2,3,4,5,6) #元组
    b = [1,2,3,4] #列表
    c = range(0,11) #range
    d = {'name':'lisi','age':14} #字典
    e = 'helloworld' #字符串
    f = {1,2,3,4,5} #集合
    g = frozenset([1,2,3,4,5,8]) #冻结集合
    
    print("a:",len(a))
    print("b:",len(b))
    print("c:",len(c))
    print("d:",len(d))
    print("e:",len(e))
    print("f:",len(f))
    
    
    ‘’‘
    输出结果：
    
    a: 6
    b: 4
    c: 11
    d: 2
    e: 10
    f: 5
    ’‘’

## 三.**猜你喜欢** ##

1.  [Python for 循环][Python for]
2.  [Python 字符串][str]
3.  [Python 列表 list][list]
4.  [Python 元组 tuple][tuple]
5.  [Python 字典 dict][dict]
6.  [Python 条件推导式][Python 3]
7.  [Python 列表推导式][Python 4]
8.  [Python 字典推导式][Python 5]
9.  [Python 函数声明和调用][Python 6]
10. [Python 不定长参数 \*argc/\*\*kargcs][Python _ _argc_kargcs]
11. [Python 匿名函数 lambda][Python _ lambda]
12. [Python return 逻辑判断表达式][Python return]
13. [Python 字符串/列表/元组/字典之间的相互转换][Python 7]
14. [Python 局部变量和全局变量][Python 8]
15. [Python type 函数和 isinstance 函数区别][Python type _ isinstance]
16. [Python is 和 == 区别][Python is _ _]
17. [Python 可变数据类型和不可变数据类型][Python 9]
18. [Python 浅拷贝和深拷贝][Python 10]

未经允许不得转载：[猿说编程][Link 1] » [Python len 函数][Python len]

[Python]: https://www.codersrc.com/python
[Python 1]: https://www.codersrc.com/pythonsimple
[Python 2]: https://www.codersrc.com/
[print]: https://www.codersrc.com/archives/6194.html
[str]: https://www.codersrc.com/archives/4996.html
[tuple]: https://www.codersrc.com/archives/5088.html
[list]: https://www.codersrc.com/archives/5061.html
[dict]: https://www.codersrc.com/archives/5114.html
[set]: https://www.codersrc.com/archives/5653.html
[frozenset]: https://www.codersrc.com/archives/5672.html
[Python for]: https://www.codersrc.com/archives/4953.html
[Python 3]: https://www.codersrc.com/archives/5346.html
[Python 4]: https://www.codersrc.com/archives/5359.html
[Python 5]: https://www.codersrc.com/archives/5377.html
[Python 6]: https://www.codersrc.com/archives/5405.html
[Python _ _argc_kargcs]: https://www.codersrc.com/archives/5443.html
[Python _ lambda]: https://www.codersrc.com/archives/5756.html
[Python return]: https://www.codersrc.com/archives/5759.html
[Python 7]: https://www.codersrc.com/archives/5137.html
[Python 8]: https://www.codersrc.com/archives/5156.html
[Python type _ isinstance]: https://www.codersrc.com/archives/5214.html
[Python is _ _]: https://www.codersrc.com/archives/5288.html
[Python 9]: https://www.codersrc.com/archives/5271.html
[Python 10]: https://www.codersrc.com/archives/5492.html
[Link 1]: https://www.codersrc.com
[Python len]: https://www.codersrc.com/archives/6203.html