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Title: GitHub - zhikunl/python-small-examples: 告别枯燥，致力于打造 Python 实用小例子，更多Python良心教程见 Python中文网 http://www.zglg.work · GitHub

Open Graph Title: GitHub - zhikunl/python-small-examples: 告别枯燥，致力于打造 Python 实用小例子，更多Python良心教程见 Python中文网 http://www.zglg.work

X Title: GitHub - zhikunl/python-small-examples: 告别枯燥，致力于打造 Python 实用小例子，更多Python良心教程见 Python中文网 http://www.zglg.work

Description: 告别枯燥，致力于打造 Python 实用小例子，更多Python良心教程见 Python中文网 http://www.zglg.work - zhikunl/python-small-examples

Open Graph Description: 告别枯燥，致力于打造 Python 实用小例子，更多Python良心教程见 Python中文网 http://www.zglg.work - zhikunl/python-small-examples

X Description: 告别枯燥，致力于打造 Python 实用小例子，更多Python良心教程见 Python中文网 http://www.zglg.work - zhikunl/python-small-examples

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	https://github.com/zhikunl/python-small-examples#介绍
Python中文网	http://www.zglg.work/python-small-examples/
Python实用小工具	http://www.zglg.work:5000/pytools
	https://github.com/zhikunl/python-small-examples#license
https://github.com/jackzhenguo/python-small-examples	https://github.com/jackzhenguo/python-small-examples
	https://github.com/zhikunl/python-small-examples#python-小例子
	https://github.com/zhikunl/python-small-examples#基本操作
常见算术运算	https://github.com/zhikunl/python-small-examples/blob/master/md/198.md
实现 relu	https://github.com/zhikunl/python-small-examples/blob/master/md/1.md
进制转化	https://github.com/zhikunl/python-small-examples/blob/master/md/2.md
整数和ASCII互转	https://github.com/zhikunl/python-small-examples/blob/master/md/3.md
元素都为真检查	https://github.com/zhikunl/python-small-examples/blob/master/md/4.md
至少一个为真检查	https://github.com/zhikunl/python-small-examples/blob/master/md/5.md
判断是真是假	https://github.com/zhikunl/python-small-examples/blob/master/md/6.md
创建复数	https://github.com/zhikunl/python-small-examples/blob/master/md/7.md
取商和余数	https://github.com/zhikunl/python-small-examples/blob/master/md/8.md
转为浮点类型	https://github.com/zhikunl/python-small-examples/blob/master/md/9.md
转为整型	https://github.com/zhikunl/python-small-examples/blob/master/md/10.md
次幂	https://github.com/zhikunl/python-small-examples/blob/master/md/11.md
四舍五入	https://github.com/zhikunl/python-small-examples/blob/master/md/12.md
链式比较	https://github.com/zhikunl/python-small-examples/blob/master/md/13.md
字符串转字节	https://github.com/zhikunl/python-small-examples/blob/master/md/14.md
任意对象转为字符串	https://github.com/zhikunl/python-small-examples/blob/master/md/15.md
执行字符串表示的代码	https://github.com/zhikunl/python-small-examples/blob/master/md/16.md
计算表达式	https://github.com/zhikunl/python-small-examples/blob/master/md/17.md
字符串格式化	https://github.com/zhikunl/python-small-examples/blob/master/md/18.md
交换两元素	https://github.com/zhikunl/python-small-examples/blob/master/md/23.md
转为字典	https://github.com/zhikunl/python-small-examples/blob/master/md/29.md
冻结集合	https://github.com/zhikunl/python-small-examples/blob/master/md/30.md
转为集合类型	https://github.com/zhikunl/python-small-examples/blob/master/md/31.md
转元组	https://github.com/zhikunl/python-small-examples/blob/master/md/32.md
查看变量所占字节数	https://github.com/zhikunl/python-small-examples/blob/master/md/48.md
含单个元素的元组	https://github.com/zhikunl/python-small-examples/blob/master/md/154.md
列表删除之坑	https://github.com/zhikunl/python-small-examples/blob/master/md/159.md
列表快速复制之坑	https://github.com/zhikunl/python-small-examples/blob/master/md/160.md
发现列表前3个最大或最小数	https://github.com/zhikunl/python-small-examples/blob/master/md/195.md
字符串驻留	https://github.com/zhikunl/python-small-examples/blob/master/md/161.md
创建空集合错误	https://github.com/zhikunl/python-small-examples/blob/master/md/166.md
充分认识for	https://github.com/zhikunl/python-small-examples/blob/master/md/164.md
认识执行时机	https://github.com/zhikunl/python-small-examples/blob/master/md/165.md
	https://github.com/zhikunl/python-small-examples#函数和模块常见用法
操作函数对象	https://github.com/zhikunl/python-small-examples/blob/master/md/24.md
创建range序列	https://github.com/zhikunl/python-small-examples/blob/master/md/55.md
生成逆序序列	https://github.com/zhikunl/python-small-examples/blob/master/md/25.md
拿来就用的排序函数	https://github.com/zhikunl/python-small-examples/blob/master/md/19.md
求和函数	https://github.com/zhikunl/python-small-examples/blob/master/md/20.md
函数的五类参数使用例子	https://github.com/zhikunl/python-small-examples/blob/master/md/26.md
使用slice对象	https://github.com/zhikunl/python-small-examples/blob/master/md/27.md
lambda 函数	https://github.com/zhikunl/python-small-examples/blob/master/md/28.md
枚举对象	https://github.com/zhikunl/python-small-examples/blob/master/md/47.md
过滤器filter	https://github.com/zhikunl/python-small-examples/blob/master/md/49.md
返回对象哈希值	https://github.com/zhikunl/python-small-examples/blob/master/md/50.md
带名字的元组	https://github.com/zhikunl/python-small-examples/blob/master/md/79.md
一行代码实现列表反转	https://github.com/zhikunl/python-small-examples/blob/master/md/70.md
反转字符串的两个方法	https://github.com/zhikunl/python-small-examples/blob/master/md/86.md
join 串联字符串	https://github.com/zhikunl/python-small-examples/blob/master/md/87.md
字符串字节长度	https://github.com/zhikunl/python-small-examples/blob/master/md/88.md
groupby单字段分组	https://github.com/zhikunl/python-small-examples/blob/master/md/129.md
groupby多字段分组	https://github.com/zhikunl/python-small-examples/blob/master/md/130.md
itemgetter和key函数	https://github.com/zhikunl/python-small-examples/blob/master/md/131.md
sum函数计算和聚合同时做	https://github.com/zhikunl/python-small-examples/blob/master/md/132.md
默认参数设为空	https://github.com/zhikunl/python-small-examples/blob/master/md/155.md
各种参数使用之坑	https://github.com/zhikunl/python-small-examples/blob/master/md/158.md
lambda自由参数之坑	https://github.com/zhikunl/python-small-examples/blob/master/md/157.md
使用堆升序列表	https://github.com/zhikunl/python-small-examples/blob/master/md/196.md
	https://github.com/zhikunl/python-small-examples#面向对象
所有对象之根	https://github.com/zhikunl/python-small-examples/blob/master/md/43.md
对象是否可调用	https://github.com/zhikunl/python-small-examples/blob/master/md/33.md
ascii 展示对象	https://github.com/zhikunl/python-small-examples/blob/master/md/34.md
类方法	https://github.com/zhikunl/python-small-examples/blob/master/md/35.md
动态删除属性	https://github.com/zhikunl/python-small-examples/blob/master/md/36.md
一键查看对象所有方法	https://github.com/zhikunl/python-small-examples/blob/master/md/37.md
动态获取对象属性	https://github.com/zhikunl/python-small-examples/blob/master/md/38.md
对象是否有某个属性	https://github.com/zhikunl/python-small-examples/blob/master/md/39.md
对象门牌号	https://github.com/zhikunl/python-small-examples/blob/master/md/40.md
实例和对象关系判断	https://github.com/zhikunl/python-small-examples/blob/master/md/41.md
issubclass父子关系鉴定	https://github.com/zhikunl/python-small-examples/blob/master/md/42.md
创建属性的两种方法	https://github.com/zhikunl/python-small-examples/blob/master/md/44.md
查看对象类型	https://github.com/zhikunl/python-small-examples/blob/master/md/45.md
元类使用介绍	https://github.com/zhikunl/python-small-examples/blob/master/md/46.md
相同值的不可变对象	https://github.com/zhikunl/python-small-examples/blob/master/md/162.md
对象销毁顺序	https://github.com/zhikunl/python-small-examples/blob/master/md/163.md
子类继承父类的静态方法吗？	https://github.com/zhikunl/python-small-examples/blob/master/md/171.md
	https://github.com/zhikunl/python-small-examples#正则
正则中字符 r作用	https://github.com/zhikunl/python-small-examples/blob/master/md/89.md
正则原子操作	https://github.com/zhikunl/python-small-examples/blob/master/md/90.md
正则中的转义	https://github.com/zhikunl/python-small-examples/blob/master/md/91.md
正则最普通查找	https://github.com/zhikunl/python-small-examples/blob/master/md/92.md
使用通用字符查找	https://github.com/zhikunl/python-small-examples/blob/master/md/93.md
使用元字符查找	https://github.com/zhikunl/python-small-examples/blob/master/md/94.md
捕获子串	https://github.com/zhikunl/python-small-examples/blob/master/md/95.md
贪心捕获和非贪心捕获	https://github.com/zhikunl/python-small-examples/blob/master/md/96.md
使用正则做密码安全检查	https://github.com/zhikunl/python-small-examples/blob/master/md/97.md
爬取百度首页标题	https://github.com/zhikunl/python-small-examples/blob/master/md/98.md
批量转化为驼峰格式(Camel)	https://github.com/zhikunl/python-small-examples/blob/master/md/99.md
使用正则判断是否为正浮点数	https://github.com/zhikunl/python-small-examples/blob/master/md/102.md
使用正则提取正整数和大于0的浮点数	https://github.com/zhikunl/python-small-examples/blob/master/md/197.md
	https://github.com/zhikunl/python-small-examples#装饰器迭代器生成器
通俗理解装饰器	https://github.com/zhikunl/python-small-examples/blob/master/md/138.md
测试函数运行时间的装饰器	https://github.com/zhikunl/python-small-examples/blob/master/md/136.md
统计异常次数装饰器	https://github.com/zhikunl/python-small-examples/blob/master/md/137.md
定制递减迭代器	https://github.com/zhikunl/python-small-examples/blob/master/md/139.md
创建迭代器	https://github.com/zhikunl/python-small-examples/blob/master/md/53.md
反向迭代器reversed	https://github.com/zhikunl/python-small-examples/blob/master/md/56.md
zip迭代器	https://github.com/zhikunl/python-small-examples/blob/master/md/57.md
list分组(生成器版)	https://github.com/zhikunl/python-small-examples/blob/master/md/134.md
列表全展开(生成器版)	https://github.com/zhikunl/python-small-examples/blob/master/md/135.md
chain串联小容器为大容器	https://github.com/zhikunl/python-small-examples/blob/master/md/84.md
product 使用案例	https://github.com/zhikunl/python-small-examples/blob/master/md/85.md
斐波那契数列前n项	https://github.com/zhikunl/python-small-examples/blob/master/md/126.md
	https://github.com/zhikunl/python-small-examples#绘图
turtle绘制奥运五环图	https://github.com/zhikunl/python-small-examples/blob/master/md/140.md
turtle绘制漫天雪花	https://github.com/zhikunl/python-small-examples/blob/master/md/141.md
Python词云图	https://github.com/zhikunl/python-small-examples/blob/master/md/142.md
Plotly柱状图和折线图	https://github.com/zhikunl/python-small-examples/blob/master/md/143.md
seaborn热力图	https://github.com/zhikunl/python-small-examples/blob/master/md/144.md
Pyecharts仪表盘	https://github.com/zhikunl/python-small-examples/blob/master/md/145.md
Pyecharts漏斗图	https://github.com/zhikunl/python-small-examples/blob/master/md/146.md
Pyecharts水球图	https://github.com/zhikunl/python-small-examples/blob/master/md/147.md
Pyecharts饼图	https://github.com/zhikunl/python-small-examples/blob/master/md/148.md
Pyecharts极坐标图	https://github.com/zhikunl/python-small-examples/blob/master/md/149.md
Pyecharts词云图	https://github.com/zhikunl/python-small-examples/blob/master/md/150.md
Pyecharts热力图	https://github.com/zhikunl/python-small-examples/blob/master/md/151.md
matplotlib绘制动图	https://github.com/zhikunl/python-small-examples/blob/master/md/152.md
seaborn pairplot图	https://github.com/zhikunl/python-small-examples/blob/master/md/153.md
pyecharts传入Numpy数据绘图失败	https://github.com/zhikunl/python-small-examples/blob/master/md/167.md
图像处理包pillow	https://github.com/zhikunl/python-small-examples/blob/master/md/169.md
	https://github.com/zhikunl/python-small-examples#数据分析
数据分析神器：deepnote	https://github.com/zhikunl/python-small-examples/blob/master/md/177.md
NumPy 的pad填充方法	https://github.com/zhikunl/python-small-examples/blob/master/md/172.md
创建下对角线为1、2、3、4的对角矩阵	https://github.com/zhikunl/python-small-examples/blob/master/md/173.md
cut 数据分箱	https://github.com/zhikunl/python-small-examples/blob/master/md/174.md
丢弃空值和填充空值	https://github.com/zhikunl/python-small-examples/blob/master/md/175.md
apply 方法去掉特殊字符	https://github.com/zhikunl/python-small-examples/blob/master/md/178.md
使用map对列做特征工程	https://github.com/zhikunl/python-small-examples/blob/master/md/179.md
category列转数值	https://github.com/zhikunl/python-small-examples/blob/master/md/180.md
rank排名	https://github.com/zhikunl/python-small-examples/blob/master/md/181.md
完成数据下采样，调整步长由小时为天	https://github.com/zhikunl/python-small-examples/blob/master/md/182.md
如何用 Pandas 快速生成时间序列数据	https://github.com/zhikunl/python-small-examples/blob/master/md/183.md
如何快速找出 DataFrame 所有列 null 值个数	https://github.com/zhikunl/python-small-examples/blob/master/md/184.md
重新排序 DataFrame 的列	https://github.com/zhikunl/python-small-examples/blob/master/md/185.md
使用 count 统计词条出现次数	https://github.com/zhikunl/python-small-examples/blob/master/md/186.md
split 求时分(HH:mm)的分钟差	https://github.com/zhikunl/python-small-examples/blob/master/md/187.md
melt透视数据小技巧	https://github.com/zhikunl/python-small-examples/blob/master/md/188.md
pivot 透视小技巧	https://github.com/zhikunl/python-small-examples/blob/master/md/189.md
p随机读取文件的K行，生成N个	https://github.com/zhikunl/python-small-examples/blob/master/md/190.md
格式化Pandas的时间列	https://github.com/zhikunl/python-small-examples/blob/master/md/191.md
	https://github.com/zhikunl/python-small-examples#其他常用
help 一键帮助	https://github.com/zhikunl/python-small-examples/blob/master/md/51.md
获取用户输入	https://github.com/zhikunl/python-small-examples/blob/master/md/52.md
文件读写和mode 取值表	https://github.com/zhikunl/python-small-examples/blob/master/md/54.md
operator使用举例	https://github.com/zhikunl/python-small-examples/blob/master/md/58.md
传输json对象	https://github.com/zhikunl/python-small-examples/blob/master/md/59.md
获取文件后缀名	https://github.com/zhikunl/python-small-examples/blob/master/md/103.md
获取路径中的文件名	https://github.com/zhikunl/python-small-examples/blob/master/md/104.md
批量修改文件后缀	https://github.com/zhikunl/python-small-examples/blob/master/md/105.md
xls批量转换成xlsx	https://github.com/zhikunl/python-small-examples/blob/master/md/106.md
获取指定后缀名的文件	https://github.com/zhikunl/python-small-examples/blob/master/md/107.md
批量压缩文件	https://github.com/zhikunl/python-small-examples/blob/master/md/108.md
32位加密	https://github.com/zhikunl/python-small-examples/blob/master/md/109.md
年的日历图	https://github.com/zhikunl/python-small-examples/blob/master/md/110.md
判断是否为闰年	https://github.com/zhikunl/python-small-examples/blob/master/md/111.md
判断月有几天	https://github.com/zhikunl/python-small-examples/blob/master/md/112.md
月的第一天	https://github.com/zhikunl/python-small-examples/blob/master/md/113.md
月的最后一天	https://github.com/zhikunl/python-small-examples/blob/master/md/114.md
获取当前时间	https://github.com/zhikunl/python-small-examples/blob/master/md/115.md
字符时间转时间	https://github.com/zhikunl/python-small-examples/blob/master/md/116.md
时间转字符时间	https://github.com/zhikunl/python-small-examples/blob/master/md/117.md
获得某天后的1~n天	https://github.com/zhikunl/python-small-examples/blob/master/md/133.md
默认启动主线程	https://github.com/zhikunl/python-small-examples/blob/master/md/118.md
创建线程	https://github.com/zhikunl/python-small-examples/blob/master/md/119.md
交替获得CPU时间片	https://github.com/zhikunl/python-small-examples/blob/master/md/120.md
多线程抢夺同一个变量	https://github.com/zhikunl/python-small-examples/blob/master/md/121.md
多线程变量竞争引起的问题	https://github.com/zhikunl/python-small-examples/blob/master/md/122.md
多线程锁	https://github.com/zhikunl/python-small-examples/blob/master/md/123.md
时间转数组及常用格式	https://github.com/zhikunl/python-small-examples/blob/master/md/124.md
nonlocal用于内嵌函数中	https://github.com/zhikunl/python-small-examples/blob/master/md/21.md
global 声明全局变量	https://github.com/zhikunl/python-small-examples/blob/master/md/22.md
共享变量未绑定之坑	https://github.com/zhikunl/python-small-examples/blob/master/md/156.md
优化代码异常输出包	https://github.com/zhikunl/python-small-examples/blob/master/md/168.md
一行代码找到编码	https://github.com/zhikunl/python-small-examples/blob/master/md/170.md
创建SQLite连接	https://github.com/zhikunl/python-small-examples/blob/master/md/192.md
json对象转python对象	https://github.com/zhikunl/python-small-examples/blob/master/md/193.md
python对象转json对象	https://github.com/zhikunl/python-small-examples/blob/master/md/194.md
一行代码让 pip 安装加速 100 倍	https://github.com/zhikunl/python-small-examples/blob/master/md/176.md
	https://github.com/zhikunl/python-small-examples#工作常用案例
不用else和if实现计算器	https://github.com/zhikunl/python-small-examples/blob/master/md/60.md
去最求平均	https://github.com/zhikunl/python-small-examples/blob/master/md/61.md
打印99乘法表	https://github.com/zhikunl/python-small-examples/blob/master/md/62.md
递归版flatten函数	https://github.com/zhikunl/python-small-examples/blob/master/md/63.md
列表等分为n份	https://github.com/zhikunl/python-small-examples/blob/master/md/64.md
压缩列表	https://github.com/zhikunl/python-small-examples/blob/master/md/65.md
求更长的列表	https://github.com/zhikunl/python-small-examples/blob/master/md/66.md
求列表众数	https://github.com/zhikunl/python-small-examples/blob/master/md/67.md
所有多个列表的最大值	https://github.com/zhikunl/python-small-examples/blob/master/md/68.md
列表检查重复	https://github.com/zhikunl/python-small-examples/blob/master/md/69.md
浮点数等差数列	https://github.com/zhikunl/python-small-examples/blob/master/md/71.md
按条件分组	https://github.com/zhikunl/python-small-examples/blob/master/md/72.md
map实现向量运算	https://github.com/zhikunl/python-small-examples/blob/master/md/73.md
值最大的字典	https://github.com/zhikunl/python-small-examples/blob/master/md/74.md
合并两个字典	https://github.com/zhikunl/python-small-examples/blob/master/md/75.md
Topn 字典	https://github.com/zhikunl/python-small-examples/blob/master/md/76.md
判断是否为异位词	https://github.com/zhikunl/python-small-examples/blob/master/md/77.md
逻辑上合并字典	https://github.com/zhikunl/python-small-examples/blob/master/md/78.md
sample 样本抽样	https://github.com/zhikunl/python-small-examples/blob/master/md/80.md
重洗数据集	https://github.com/zhikunl/python-small-examples/blob/master/md/81.md
10个均匀分布的坐标点	https://github.com/zhikunl/python-small-examples/blob/master/md/82.md
10个高斯分布的坐标点	https://github.com/zhikunl/python-small-examples/blob/master/md/83.md
是否互为排序词	https://github.com/zhikunl/python-small-examples/blob/master/md/100.md
str1是否由str2旋转而来	https://github.com/zhikunl/python-small-examples/blob/master/md/101.md
寻找第n次出现位置	https://github.com/zhikunl/python-small-examples/blob/master/md/125.md
找出所有重复元素	https://github.com/zhikunl/python-small-examples/blob/master/md/127.md
联合统计次数	https://github.com/zhikunl/python-small-examples/blob/master/md/128.md
求两点球面距离	https://github.com/zhikunl/python-small-examples/blob/master/md/199.md
获取文件编码	https://github.com/zhikunl/python-small-examples/blob/master/md/200.md
格式化json串	https://github.com/zhikunl/python-small-examples/blob/master/md/201.md
	https://github.com/zhikunl/python-small-examples#python原创教程
个人网站	http://www.zglg.work/python-level/
Python进阶完整教程	http://www.zglg.work/python-level/
Python前言	http://www.zglg.work/Python-20-topics/intro-python/
Google Python代码风格指南	http://www.zglg.work/Python-20-topics/google-python-coding-style/
Python数字	http://www.zglg.work/Python-20-topics/python-number/
Python正则之提取正整数和大于0浮点数	http://www.zglg.work/python-level/python-re-integer-float.md
Python字符串	http://www.zglg.work/Python-20-topics/python-string/
CSV读写乱码问题	http://www.zglg.work/Python-20-topics/csv-rw-coding-issue/
Unicode标准化	http://www.zglg.work/Python-20-topics/unicode-standard/
Unicode, UTF-8, ASCII	http://www.zglg.work/Python-20-topics/unicode-utf-8/
Python动态生成变量	http://www.zglg.work/Python-20-topics/dynamic_variable/
Python字符串对齐	http://www.zglg.work/Python-20-topics/python-string-align/
Python小项目1：文本句子关键词的KWIC显示	http://www.zglg.work/Python-20-topics/python-project1-kwic/
Python列表	http://www.zglg.work/Python-20-topics/python-list/
Python流程控制	http://www.zglg.work/Python-20-topics/python-control/
Python编程习惯专题	http://www.zglg.work/Python-20-topics/python-program-habit/
Python函数专题	http://www.zglg.work/Python-20-topics/python-functions/
Python面向对象编程-上篇	http://www.zglg.work/Python-20-topics/python-oop-1/
Python面向对象编程-下篇	http://www.zglg.work/Python-20-topics/python-oop-2/
Python十大数据结构使用专题	http://www.zglg.work/Python-20-topics/python-data-structure/
Python包和模块使用注意事项专题	http://www.zglg.work/Python-20-topics/python-package-module-apply-items/
Python正则使用专题	http://www.zglg.work/Python-20-topics/python-re-apply/
Python时间专题	http://www.zglg.work/Python-20-topics/python-time/
Python装饰器专题	http://www.zglg.work/Python-20-topics/python-decorator-apply/
Python迭代器使用专题	http://www.zglg.work/Python-20-topics/python-iterator-apply/
Python生成器使用专题	http://www.zglg.work/Python-20-topics/python-generator-apply/
Python 绘图入门专题	http://www.zglg.work/Python-20-topics/python-graph-intro/
Matplotlib绘图基础专题	http://www.zglg.work/Python-20-topics/python-matplotlib-1/
Matplotlib绘图进阶专题	http://www.zglg.work/Python-20-topics/python-matplotlib-2/
Matplotlib绘图案例	http://www.zglg.work/Python-20-topics/python-matplotlib-examples/
NumPy图解入门	http://www.zglg.work/Python-20-topics/numpy-graph-intro/
	https://github.com/zhikunl/python-small-examples#numpy入门教程
NumPy介绍	http://www.zglg.work/numpy-intro/
安装和导入NumPy	http://www.zglg.work/numpy/numpy-install/
Python列表和NumPy数组有什么区别？	http://www.zglg.work/numpy/numpy-array-different-python-list/
什么是array?	http://www.zglg.work/numpy/what-is-numpy/
有关Array的详细信息	http://www.zglg.work/numpy/numpy-array-more/
如何创建array	http://www.zglg.work/numpy/numpy-create-array/
添加、删除和排序元素	http://www.zglg.work/numpy/numpy-add-remove-sort/
数组形状和大小	http://www.zglg.work/numpy/numpy-shape/
重塑array	http://www.zglg.work/numpy/numpy-reshape/
如何将一维array转换为二维array(如何向数组添加新轴)	http://www.zglg.work/numpy/numpy-1d-2d-more/
NumPy索引和切片	http://www.zglg.work/numpy/numpy-indexing-slicing/
如何从现有数据创建数组	http://www.zglg.work/numpy/numpy-create-an-array-from-existing-data/
数组基本操作	http://www.zglg.work/numpy/numpy-basic-array-operations/
广播	http://www.zglg.work/numpy/numpy-broadcasting/
更有用的数组操作	http://www.zglg.work/numpy/numpy-more-array-operations/
生成随机数	http://www.zglg.work/numpy/numpy-generate-random-number/
http://www.zglg.work	http://www.zglg.work
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