# python-small-examples

**Repository Path**: AmosLeeDay/python-small-examples

## Basic Information

- **Project Name**: python-small-examples
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2020-09-12
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

<div align="center">
<img src="https://img.shields.io/badge/-Python-brightgreen">
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<img src="https://img.shields.io/badge/-%E6%9C%BA%E5%99%A8%E5%AD%A6%E4%B9%A0-lightgrey">
<a href="https://static01.imgkr.com/temp/c6e10a16c4764dcdb32587760f6769ec.png" width="28%"><img src="https://img.shields.io/badge/%E5%85%AC%E4%BC%97%E5%8F%B7-Python%E5%B0%8F%E4%BE%8B%E5%AD%90-orange"></a>
</div>
<br>

<div align="center">
<img src="https://static01.imgkr.com/temp/9785963f175849d7bbc8a49ea02a54ea.png" width="20%" />
<img src="https://static01.imgkr.com/temp/f379139a2c5d463799c35c1aa68911d7.png" width="18%"/>
</div>

<br>

<br>
</div>

## 介绍

告别枯燥，告别枯燥，致力于打造 Python 经典小例子、小案例。 如果转载本库小例子、小案例，请备注下方链接：Python小例子 https://github.com/jackzhenguo/python-small-examples

查看完整的旧版本：[改版前V3.0](V3.md)

## 贡献

欢迎贡献小例子到此库

## License

允许按照要求转载，但禁止用于任何商用目的。

## Python 原创教程
这是经过很久打磨的一个Python教程，全部是个人原创，已首发在公众号，并且托管在我的[个人网站](http://www.zglg.work/?page_id=535)。想系统入门Python的欢迎学习：

[Python教程](http://www.zglg.work/?page_id=535)

- [1 数字专题](http://www.zglg.work/?page_id=530)
- [2 字符串专题](http://www.zglg.work/?page_id=540)
- 3 列表专题
  - [3.1 列表基础](http://www.zglg.work/?page_id=563)
  - [3.2 列表进阶](http://www.zglg.work/?page_id=575)
- 4 流程控制专题
  - [4.1 流程控制基础](http://www.zglg.work/?page_id=618)
  - [4.2 流程控制进阶](http://www.zglg.work/?page_id=621)
- 5 编程风格
  - [5.1 基本编程习惯](http://www.zglg.work/?page_id=654)
  - [5.2 EAFP 防御编程风格](http://www.zglg.work/?page_id=657)
  - [5.3 LBYL 防御编程风格](http://www.zglg.work/?page_id=659)

后续章节正在整理推送中。

## Python 小例子

| 编号 | 链接                    | 标签              | 版本          | 难度 |
| ---- | ---------------------------------- | ---- | ---- | ---- |
| 1    | [实现 relu](md/1.md) | max   | V4.0        | ⭐️⭐️ |
| 2    | [进制转化](md/2.md)                | bin,oct,hex | V4.0            |  ⭐️⭐️    |
| 3    | [整数和ASCII互转](md/3.md)         | chr,ord | V1.0     | ⭐️⭐️ |
| 4    | [元素都为真检查](md/4.md)          | all   | V2.0      | ⭐️⭐️⭐️ |
| 5    | [至少一个为真检查](md/5.md)        | any | V2.0    | ⭐️⭐️⭐️ |
| 6    | [判断是真是假](md/6.md)            | bool        | V2.0        | ⭐️⭐️⭐️ |
| 7    | [创建复数](md/7.md)                | complex         | V1.0            | ⭐️⭐️⭐️ |
| 8    | [取商和余数](md/8.md)              | divmod        | V1.0          | ⭐️⭐️ |
| 9    | [转为浮点类型](md/9.md)            | float       | V1.0        | ⭐️⭐️ |
| 10   | [转为整型](md/10.md)               | int            | V1.0           | ⭐️ |
| 11   | [次幂](md/11.md)                   | pow                | V1.0               | ⭐️ |
| 12   | [四舍五入](md/12.md)               | round          | V1.0           | ⭐️ |
| 13   | [链式比较](md/13.md)               | compare       | V1.0           | ⭐️⭐️ |
| 14   | [字符串转字节](md/14.md)           | bytes,utf-8 | V1.0       | ⭐️⭐️ |
| 15   | [任意对象转为字符串](md/15.md)     | str  | V1.0 | ⭐️⭐️ |
| 16   | [执行字符串表示的代码](md/16.md)   | compile | V1.0 | ⭐️⭐️⭐️ |
| 17   | [计算表达式](md/17.md)             | eval         | V1.0         | ⭐️⭐️⭐️⭐️ |
| 18   | [字符串格式化](md/18.md)           | format     | V1.0       | ⭐️⭐️⭐️⭐️ |
| 19   | [拿来就用的排序函数](md/19.md)     | sorted | V1.0 | ⭐️⭐️⭐️ |
| 20   | [求和函数](md/20.md)               | sum            | V1.0           | ⭐️⭐️ |
| 21   | [nonlocal用于内嵌函数中](md/21.md) | nonlocal | V2.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 22   | [global 声明全局变量](md/22.md)    | global | V2.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 23   | [交换两元素](md/23.md)             | pack,unpack | V1.0         | ⭐️⭐️ |
| 24   | [操作函数对象](md/24.md)           | operator   | V2.0       | ⭐️⭐️⭐️⭐️ |
| 25   | [生成逆序序列](md/25.md)           | range | V1.0       | ⭐️⭐️ |
| 26   | [函数的五类参数使用例子](md/26.md) | variable parameter | V2.0 | ⭐️⭐️⭐️⭐️ |
| 27   | [使用slice对象](md/27.md)          | slice     | V2.0      | ⭐️⭐️⭐️⭐️⭐️ |
| 28   | [lambda 函数](md/28.md)  | lambda | V3.0 | ⭐️⭐️⭐️⭐️ |
| 29   | [转为字典](md/29.md)               | dict           | V1.0           | ⭐️⭐️ |
| 30   | [冻结集合](md/30.md)               | frozenset | V1.0           | ⭐️⭐️ |
| 31   | [转为集合类型](md/31.md)           | set        | V1.0       | ⭐️⭐️ |
| 32   | [转元组](md/32.md)                 | tuple            | V1.0             | ⭐️⭐️ |
| 33   | [对象是否可调用](md/33.md)         | callable | V2.5   | ⭐️⭐️⭐️⭐️ |
| 34   | [ascii 展示对象](md/34.md)         | `__repr__` | V2.5     | ⭐️⭐️⭐️ |
| 35   | [类方法](md/35.md)                 | classmethod      | V1.5             | ⭐️⭐️⭐️ |
| 36   | [动态删除属性](md/36.md)           | delattr,hasattr | V1.5       | ⭐️⭐️ |
| 37   | [一键查看对象所有方法](md/37.md)   | dir | V1.5 | ⭐️⭐️ |
| 38   | [动态获取对象属性](md/38.md)       | getattr | V1.5   | ⭐️⭐️ |
| 39   | [对象是否有某个属性](md/39.md)     | hasattr | V1.5 | ⭐️⭐️⭐️ |
| 40   | [对象门牌号](md/40.md)             | id           | V1.0         | ⭐️ |
| 41   | [实例和对象关系判断](md/41.md)    | isinstance   | V1.5         | ⭐️⭐️⭐️ |
| 42   | [issubclass父子关系鉴定](md/42.md) | issubclass | V1.5 | ⭐️⭐️⭐️ |
| 43   | [所有对象之根](md/43.md)           | object     | V1.0       | ⭐️ |
| 44   | [创建属性的两种方法](md/44.md)     | property | V2.5 | ⭐️⭐️⭐️⭐️⭐️ |
| 45   | [查看对象类型](md/45.md)           | type      | V1.0       | ⭐️ |
| 46   | [元类使用介绍](md/46.md)     | type,`__class__` | V2.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 47   | [枚举对象](md/47.md)       | enumerate | V1.0   | ⭐️⭐️⭐️ |
| 48   | [查看变量所占字节数](md/48.md)  | getsizeof | V1.0 | ⭐️⭐️⭐️ |
| 49   | [过滤器filter](md/49.md)  | filter | V1.5 | ⭐️⭐️⭐️ |
| 50   | [返回对象哈希值](md/50.md)    | hash | V1.0 | ⭐️⭐️ |
| 51   | [help 一键帮助](md/51.md)  | help | V1.0 | ⭐️ |
| 52   | [获取用户输入](md/52.md)     | input | V1.0 | ⭐️ |
| 53   | [创建迭代器](md/53.md)      | iter,`__iter__` | V1.5  | ⭐️⭐️⭐️ |
| 54   | [文件读写和mode 取值表](md/54.md) | open,read,write,with,mode | V2.0 | ⭐️⭐️⭐️ |
| 55   | [创建range序列](md/55.md) | range | V1.0 | ⭐️⭐️ |
| 56   | [反向迭代器reversed](md/56.md) | reversed | V1.0 | ⭐️⭐️ |
| 57   | [zip迭代器](md/57.md)     | zip  | V1.5 | ⭐️⭐️⭐️ |
| 58   | [operator使用举例](md/58.md) | operator | V1.0 | ⭐️⭐️⭐️⭐️ |
| 59   | [传输json对象](md/59.md)  | json | V2.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 60   | [不用else和if实现计算器](md/60.md) | operator | V1.0 | ⭐️⭐️⭐️ |
| 61   | [去最求平均](md/61.md)      | list,sort,round | V1.0  | ⭐️⭐️⭐️⭐️ |
| 62   | [打印99乘法表](md/62.md)    | for,range,format | V1.0 | ⭐️⭐️⭐️ |
| 63   | [递归版flatten函数](md/63.md) | recursion,list,isinstance | V1.0 | ⭐️⭐️⭐️⭐️ |
| 64   | [列表等分为n份](md/64.md)  | list,ceil | V1.0 | ⭐️⭐️⭐️ |
| 65   | [压缩列表](md/65.md)       | list,filter | V1.0   | ⭐️⭐️⭐️⭐️ |
| 66   | [求更长的列表](md/66.md)     | max,lambda | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 67   | [求列表众数](md/67.md)     | max,lambda,count | V1.0 | ⭐️⭐️⭐️⭐️ |
| 68   | [所有多个列表的最大值](md/68.md) | max,lambda | V1.0 | ⭐️⭐️⭐️⭐️ |
| 69   | [列表检查重复](md/69.md)     | set  | V1.0 | ⭐️⭐️⭐️ |
| 70   | [一行代码实现列表反转](md/70.md) | reverse | V1.0 | ⭐️⭐️ |
| 71   | [浮点数等差数列](md/71.md)    | range,float | V1.0 | ⭐️⭐️⭐️⭐️ |
| 72   | [按条件分组](md/72.md)      | lambda | V1.0  | ⭐️⭐️⭐️⭐️ |
| 73   | [map实现向量运算](md/73.md)  | map,lambda | V1.0 | ⭐️⭐️⭐️ |
| 74   | [值最大的字典](md/74.md)     | max,lambda | V1.0 | ⭐️⭐️⭐️⭐️ |
| 75   | [合并两个字典](md/75.md)     | **   | V1.0 | ⭐️⭐️⭐️ |
| 76   | [Topn 字典](md/76.md)    | heapq,nlargest | V1.0 | ⭐️⭐️⭐️ |
| 77   | [判断是否为异位词](md/77.md) | collections,Counter | V1.0 | ⭐️⭐️⭐️ |
| 78   | [逻辑上合并字典](md/78.md) | ChainMap | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 79   | [带名字的元组](md/79.md) | namedtuple | V1.0 | ⭐️⭐️⭐️ |
| 80   | [sample 样本抽样](md/80.md) | random,sample | V1.0 | ⭐️⭐️⭐️ |
| 81   | [重洗数据集](md/81.md) | shuffle | V1.0 | ⭐️⭐️⭐️ |
| 82   | [10个均匀分布的坐标点](md/82.md) | random,uniform | V1.0 | ⭐️⭐️⭐️ |
| 83   | [10个高斯分布的坐标点](md/83.md) | random,gauss | V1.0 | ⭐️⭐️⭐️⭐️ |
| 84   | [chain串联小容器为大容器](md/84.md) | itertools,chain | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 85   | [product 使用案例](md/85.md) | product | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 86   | [反转字符串的两个方法](md/86.md) | reversed | V1.0 | ⭐️⭐️ |
| 87   | [join 串联字符串](md/87.md) | join | V1.0 | ⭐️⭐️ |
| 88   | [字符串字节长度](md/88.md) | encode | V1.0 | ⭐️⭐️ |
| 89   | [正则中字符 `r`作用](md/89.md) | re,r | V3.0 | ⭐️⭐️⭐️ |
| 90   | [正则原子操作](md/90.md) | re | V3.0 | ⭐️⭐️⭐️ |
| 91   | [正则中的转义](md/91.md) | re,\ | V3.0 | ⭐️⭐️⭐️ |
| 92   | [正则最普通查找](md/92.md) | re,findall | V3.0 | ⭐️⭐️⭐️ |
| 93   | [使用通用字符查找](md/93.md) | re,\s,\w,\d | V3.0 | ⭐️⭐️⭐️ |
| 94   | [使用元字符查找](md/94.md) | re,+,* | V3.0 | ⭐️⭐️⭐️ |
| 95   | [捕获子串](md/95.md) | () | V3.0 | ⭐️⭐️⭐️⭐️ |
| 96   | [贪心捕获和非贪心捕获](md/96.md) | re | V1.0 | ⭐️⭐️⭐️⭐️ |
| 97   | [使用正则做密码安全检查](md/97.md) | re | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 98   | [爬取百度首页标题](md/98.md) | re | V1.0 | ⭐️⭐️⭐️⭐️ |
| 99   | [批量转化为驼峰格式(Camel)](md/99.md) | re | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 100   | [是否互为排序词](md/100.md) | collections,defaultdict | V1.0 | ⭐️⭐️⭐️⭐️ |
| 101   | [str1是否由str2旋转而来](md/101.md) | str | V1.0 | ⭐️⭐️⭐️ |
| 102   | [使用正则判断是否为正浮点数](md/102.md) | str,re,float | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 103   | [获取文件后缀名](md/103.md) | os,splitext | V1.0 | ⭐️⭐️ |
| 104   | [获取路径中的文件名](md/104.md) | os,split | V1.0 | ⭐️⭐️ |
| 105   | [批量修改文件后缀](md/105.md) | argparse,listdir | V1.0 | ⭐️⭐️⭐️⭐️ |
| 106   | [xls批量转换成xlsx](md/106.md) | os,listdir,splitext | V1.0 | ⭐️⭐️⭐️⭐️ |
| 107   | [获取指定后缀名的文件](md/107.md) | os,listdir,splitext | V1.0 | ⭐️⭐️⭐️⭐️ |
| 108   | [批量压缩文件](md/108.md) | zipfile | V1.0 | ⭐️⭐️⭐️⭐️ |
| 109   | [32位加密](md/109.md) | hashlib | V1.0 | ⭐️⭐️⭐️⭐️ |
| 110   | [年的日历图](md/110.md) | calendar | V1.0 | ⭐️⭐️ |
| 111   | [判断是否为闰年](md/111.md) | calendar | V1.0 | ⭐️⭐️⭐️ |
| 112   | [判断月有几天](md/112.md) | calendar,datetime | V1.0 | ⭐️⭐️⭐️ |
| 113   | [月的第一天](md/113.md) | datetime | V1.0 | ⭐️⭐️ |
| 114 | [月的最后一天](md/114.md) | calendar,datetime | V1.0 | ⭐️⭐️ |
| 115 | [获取当前时间](md/115.md) | time,datetime | V1.0 | ⭐️⭐️ |
| 116 | [字符时间转时间](md/116.md) | time,datetime | V1.0 | ⭐️⭐️ |
| 117 | [时间转字符时间](md/117.md) | time,datetime | V1.0 | ⭐️⭐️ |
| 118 | [默认启动主线程](md/118.md) | threading | V1.0 | ⭐️⭐️ |
| 119 | [创建线程](md/119.md) | threading | V1.0 | ⭐️⭐️ |
| 120 | [交替获得CPU时间片](md/120.md) | threading | V1.0 | ⭐️⭐️⭐️ |
| 121 | [多线程抢夺同一个变量](md/121.md) | threading | V1.0 | ⭐️⭐️⭐️ |
| 122 | [多线程变量竞争引起的问题](md/122.md) | threading | V1.0 | ⭐️⭐️⭐️ |
| 123 | [多线程锁](md/123.md) | threading,lock | V1.0 | ⭐️⭐️⭐️ |
| 124 | [时间转数组及常用格式](md/124.md) | time,datetime,format | V1.0 | ⭐️⭐️⭐️ |
| 125 | [寻找第n次出现位置](md/125.md) | enumerator | V1.0 | ⭐️⭐️⭐️ |
| 126 | [斐波那契数列前n项](md/126.md) | yield,range | V1.0 | ⭐️⭐️⭐️ |
| 127 | [找出所有重复元素](md/127.md) | calendar,datetime | V1.0 | ⭐️⭐️⭐️⭐️ |
| 128 | [联合统计次数](md/128.md) | Counter | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 129 | [groupby单字段分组](md/129.md) | itertools, groupby,lambda | V1.0 | ⭐️⭐️⭐️ |
| 130 | [groupby多字段分组](md/130.md) | itemgetter,itertools,groupby | V1.0 | ⭐️⭐️⭐️⭐️ |
| 131 | [itemgetter和key函数](md/131.md) | operator,itemgetter,itertools | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 132 | [sum函数计算和聚合同时做](md/132.md) | sum,generator | V1.0 | ⭐️⭐️⭐️⭐️⭐️ |
| 133 | [获得某天后的1~n天](md/133.md) | Calendar,monthrange | V4.0 | ⭐️⭐️⭐️ |
| 134 | [list分组(生成器版)](md/134.md) | yield,generator | V1.0 | ⭐️⭐️⭐️ |
| 135 | [列表全展开(生成器版)](md/135.md) | list,yield,generator | V1.0 | ⭐️⭐️⭐️ |
| 136 | [测试函数运行时间的装饰器](md/136.md) | decorator | V1.0 | ⭐️⭐️⭐️⭐️ |
| 137 | [统计异常次数装饰器](md/137.md) | decorator,nonlocal | V1.5 | ⭐️⭐️⭐️⭐️ |
| 138 | [通俗理解装饰器](md/138.md) | decorator | V1.0 | ⭐️⭐️⭐️ |
| 139 | [定制递减迭代器](md/139.md) | Iterator | V3.0 | ⭐️⭐️⭐️⭐️ |
| 140 | [turtle绘制奥运五环图](md/140.md) | turtle | V1.0 | ⭐️⭐️⭐️ |
| 141 | [turtle绘制漫天雪花](md/141.md) | turtle | V1.0 | ⭐️⭐️⭐️ |

更多例子正在整理发布中......