Python 3.6 dict becomes compact and keywords become ordered
[python-Dev] Python 3.6 dict becomes compact and gets a private version; and keywords become ordered Victor Stinner victor.stinner at gmail.com Thu Sep 8 16:22:46 EDT 2016 Previous message (by thread):...
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List to Graph: How to Represent Your List as a Graph In Python
Let me start by showing you the following graph: It looks familiar, doesn't it? This is called a bar graph . We normally draw them using different applications like Microsoft Excel and Microsoft Word....
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Malthe Borch: Python's Missing String Type
The Sign Up With Google Mistake You Can't Fix Tue, 1 Mar 2016 18:30:00 GMT Updated This blog post has been revised to more accurately reflect some details. Thanks to Fleep CEO Henn Ruukel for reaching...
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Google’s gRPC: A Lean and Mean Communication Protocol for Microservices
First, a Short History of Remote Execution From the time the industry discovered networking by interconnecting machines, the quest for most optimized remote communication mechanism has begun. While...
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用matplotlib绘制精美的图表
matplotlib是python最著名的绘图库，它提供了一整套和matlab相似的命令API，十分适合交互式地进行制图。本节通过几个样例来介绍下如何使用matplotlib绘制精美的图表 请尊重原创，转载请注明来源网站 www.shareditor.com 以及原始链接地址 安装方法 pip install matplotlib 绘制一元函数图像y=ax+b...
View Article解决PyScripter中文乱码问题
PyScripter看起来还是挺不错的一个python ide 环境: PyScripter 2.6.0.0 python3.4 问题： PyScripter有个小坑，打开文件后中文都成了乱码。在PyScripter中新建的文件中文可以正常显示，但是重新打开后中文乱码。 PyScripter中文乱码原因： 原因是如果文件头部没有编码声明，那么PyScripter会默认使用ANSI打开文件。...
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Python Data Science Handbook Supplemental Materials
python Data Science Handbook Supplemental Materials Supplemental materials for my OReilly project, the Python Data Science Handbook See also the free companion project, A Whirlwind Tour of Python ....
View ArticlePython 访问外围作用域中的变量
在表达式中引用变量时，python 会按照如下的顺序遍历各个作用域，寻找该变量： 当前函数作用域 任何外围作用域（比如包含当前函数的其他函数） global 作用域，即代码所在的模块的作用域 如果上述作用域内都找不到变量，就会报 NameError 异常。 但是对变量赋值时，规则会有所不同。 如果当前作用域变量已存在，那么其值会被替换。...
View ArticlePython 中的关键字with详解
在 python 2.5 中， with 关键字被加入。它将常用的 try ... except ... finally ... 模式很方便的被复用。看一个最经典的例子： with open('file.txt') as f: content = f.read() 在这段代码中，无论 with...
View ArticleSerializing GraphML
This is mostly a post of annoyance. I’ve been working with graphs in python via NetworkX and trying to serialize them to GraphML for use in Gephi and graph-tool. Unfortunately the following error is...
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The Elevator Game!
The elevator game is a little thought experiment. It is not new, in fact Elevator Saga is another fun one. This one was just based on whatever came out of my head to see what would happen. Here are...
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python之最强王者（4）――字符串
1.python 中文编码 前面章节中我们已经学会了如何用 Python 输出 "Hello, World!" ，英文没有问题，但是如果你输出中文字符 " 你好，世界 " 就有可能会碰到中文编码问题。 Python 文件中如果未指定编码，在执行过程会出现报错。 Python 中默认的编码格式是 ASCII 格式，在没修改编码格式时无法正确打印汉字，所以在读取中文时会报错。...
View ArticleJupyter + matplotlib =
matplotlib 是很不错的数据可视化库，然而每次写一个脚本，跑出来看完又回头改，改完再跑，实在是累。所以就有 Ipython Notebook 啦，后来改名叫 Jupyter 了，不光支持 Python，还支持 Julia 什么的样子（在下一盘很大的棋呢）。 Arch linux 用户使用以下命令安装： sudo pacman -S jupyter-nbconvert...
View ArticlePyPy Development: RevDB released, v5.4.1
Hi all, The first beta version of RevDB is out!Remember that RevDB is a reverse debugger for python. The idea is that it is a debugger that can run forward and backward in time, letting you more easily...
View ArticleA Complete Tutorial on Tree Based Modeling from Scratch (in R & Python)
来源：https://www.analyticsvidhya.com 原文链接： A Complete Tutorial on Tree Based Modeling from Scratch (in R & python)...
View Articlepython之最强王者（5）――Nunber(数字)
1.pythonNumber( 数字 ) Python Number 数据类型用于存储数值。 数据类型是不允许改变的 , 这就意味着如果改变 Number 数据类型的值，将重新分配内存空间。 以下实例在变量赋值时 Number 对象将被创建： var1 = 1var2 = 10 您也可以使用 del 语句删除一些 Number 对象引用。 del 语句的语法是： del...
View ArticleRevDB, the Reverse Debugger
Introduction A "reverse debugger" is a debugger where you can go forward and backward in time. RevDB is a reverse debugger for python based on PyPy. It can be used to track down hard-to-reproduce bugs...
View ArticleChanging python lambda syntax at runtime
A Better Lambda For a long time, I've had a distaste for the syntax of lambda expressions in python. add1 = lambda value: value + 1 print add1(1) >>> 2 Compared to syntaxes for the same effect...
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python：常用的几种预处理方法
标准化 变换后各维特征有0均值，单位方差。也叫z-score规范化（零均值规范化）。计算方式是将特征值减去均值，除以标准差。 from sklearn.preprocessing import scale X = np.array([[ 1., -1., 2.],[ 2., 0., 0.],[ 0., 1., -1.]]) scale(X)...
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[译] 深度探索 Python：让我们审查 dict 模块
[译] 深度探索 python：让我们审查 dict 模块 29分钟前来源：开发者头条 原文：Deep Exploration Into Python: Let's Review The Dict Module Dictobject.c是Python的dict对象背后的模块。它非常常用，但有一些鲜为人知的秘密，这些秘密对于了解最佳性能非常有用。...
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