Count minimum bits to flip such that XOR of A and B equal to C
Given a sequence of three binary sequences A, B and C of N bits. Count the minimum bits required to flip in A and B such that XOR of A and B is equal to C. For example:- Input: N = 3 A = 110 B = 101 C...
View Article使用PDB调试Python程序的完整实践
介绍 在开发简单程序的时候，可以通过加入print或是log的方式进行程序的调试，但是对于复杂的程序这种方式往往比较困难，这时就需要引入一种可以进行单步调试以及可以方便查看变量的方法来进行程序问题的排查，python 的pdb就是用来解决这个问题的。 常用命令 命令 用途 break 或 b 设置断点 continue 或 c 继续执行程序, 或是跳到下个断点 list 或 l 查看当前行的代码段...
View Article使用cProfiler对Python程序进行性能分析
介绍 profiler是一个程序，用来描述运行时的程序性能，并且从不同方面提供统计数据加以表述。 python中含有3个模块提供这样的功能，分别是cProfile,profile和pstats。这些分析器提供的是对Python程序的确定性分析。同时也提供一系列的报表生成工具，允许用户快速地检查分析结果。 Python标准库提供了3个不同的性能分析器： -...
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【深入Python编程】Python与设计模式--工厂类相关模式
一、快餐点餐系统（1） 想必大家一定见过类似于麦当劳自助点餐台一类的点餐系统吧。在一个大的触摸显示屏上，有三类可以选择的上餐品：汉堡等主餐、小食、饮料。当我们选择好自己需要的食物，支付完成后，订单就生成了。下面，我们用今天的主角--工厂模式--来生成这些食物的逻辑主体。 首先，来看主餐的生成（仅以两种汉堡为例）。 class Burger(): name="" price=0.0 def...
View Articlepython的sort()与sorted()详解
两种方法默认都使用ASCII值使用冒泡算法来从小到大进行排序。 何为冒泡算法？ 摘自百度百科： 冒泡排序（Bubble Sort），是一种计算机科学领域的较简单的排序算法。 它重复地走访过要排序的数列，一次比较两个元素，如果他们的顺序错误就把他们交换过来。走访数列的工作是重复地进行直到没有再需要交换，也就是说该数列已经排序完成。...
View Article#99 Morepath: Super Powered Python Web Framework
One of the areas where python truly shines is on the web. Many well known websites like YouTube, Pintrest, and Spotify are powered by Python. In the mid 2000's, a number of powerful and popular...
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python读写json文件
JSON(javascript Object Notation) 是一种轻量级的数据交换格式。它基于ECMAScript的一个子集。 JSON采用完全独立于语言的文本格式，但是也使用了类似于C语言家族的习惯(包括C、C++、Java、JavaScript、Perl、python等)。这些特性使JSON成为理想的数据交换语言。易于人阅读和编写，同时也易于机器解析和生成(一般用于提升网络传输速率)。...
View ArticleWorking with the Python Super Function
python 2.2 saw the introduction of a built-in function called “super,” which returns a proxy object to delegate method calls to a class which can be either parent or sibling in nature. That description...
View ArticleCaktus Consulting Group: Python type annotations
When it comes to programming, I have a belt and suspenders philosophy. Anything that can help me avoid errors early is worth looking into. The type annotation support that's been gradually added to...
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Introduction to Python for Big data Analytics
Hi everyone, if you are a fresher or experienced having lot of queries for learning which programming language. Don’t worry… we are providing a Webinar on python for Big data Analytics. The title of...
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Digital Offers: Learn to code with Python for only $22.50
Just about everything relies on some type of code nowadays. Cars are computerized; we use computers all day long, and we're glued to our smartphones from sunup to sundown. python is a major coding...
View Article使用Python转换日期为cron表达式
在近期的项目中,需要在用户的界面展示cron表达式的内容,而PyPI上却没有提供相对应的包,大部分都是如何调用cron表达式的库。 因此,只要自己写1个,代码方面极其简单,我们可以通过pip进行安装: pip install date2cron 然后导入该模块的 date_to_cron 函数: >>> from date2cron import date_to_cron...
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PyCharm: PyCharm 2017.1 EAP 8 (build 171.3566.25)
Our eighth Early Access Program (EAP) release for PyCharm 2017.1 is out now! Get it from our EAP page. New Features Vue.js initial support. Vue is a MVVM (Model-View-ViewModel) javascript framework...
View ArticleHandling Index Creation with MongoEngine in Python
MongoEngine is an Object Document Mapper (ODM) for working with MongoDB from python. The ODM layer maps an object model to a document database in a way similar to an ORM mapping an object model to a...
View ArticleFind power of power under mod of a prime
Given four numbers A, B, C and M, where M is prime number. Our task is to find A B C (mod M). Input : A = 2, B = 4, C = 3, M = 23Output : 6243(mod 23) = 6 A Naive Approach is to calculate res = B C...
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python爬虫利器Selenium使用详解
简介： 用pyhon爬取动态页面时普通的urllib2无法实现，例如下面的京东首页，随着滚动条的下拉会加载新的内容，而urllib2就无法抓取这些内容，此时就需要今天的主角selenium。 Selenium是一个用于Web应用程序测试的工具。Selenium测试直接运行在浏览器中，就像真正的用户在操作一样。支持的浏览器包括IE、Mozilla Firefox、Mozilla...
View ArticleAnnouncing Bootstrapped A Python library to generate confidence intervals
bootstrapped - confidence intervals made easy bootstrappedis a python library that allows you to build confidence intervals from data. This is useful in a variety of contexts - including during ad-hoc...
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Build a REST API with Django A Test Driven Approach: Part 2
Related Course Get Started with javascript for Web Development JavaScript is the language on fire. Build an app for any platform you want including website, server, mobile, and desktop. Code The...
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Python Engineering at Microsoft: Python support in Visual Studio 2017
Over the last few months, Visual Studio 2017 has been in preview and many of you have been trying it out and providing feedback. We are very appreciative of everyone who has taken the time to do this....
View ArticlePython vs PHP vs Ruby ―― 编程语言大对决
编程语言种类繁多，每种语言都有它们的独特的优势。开发者在对编程语言的进行选择时往往很讲究。因此，这篇文章将从各个角度对 php、Ruby、python 三种当前比较流行的语言的优势和劣势进行对比，希望你能从中受益。 在进入主题之前，我想分享一些数据，这是我刚学习 Web 开发时候看到的，虽然内容不够新，但能为三类语言的比较提供依据。 Python vs PHP vs Ruby 数据显示： 市场对...
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