python from __future__ import division
1.在 python2 中导入未来的支持的语言特征中division(精确除法)，即from __future__ import division ，当我们在程序中没有导入该特征时，"/"操作符执行的只能是整除，也就是取整数，只有当我们导入division(精确算法)以后，"/"执行的才是精确算法。 如： #python 2.7.6 Python 2.7.6 (default, Nov 10...
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《Python高效开发实战》实战演练――基本视图3
在完成Django项目和应用的建立后，即可以开始编写网站应用代码，这里通过为注册页面显示一个欢迎标题，来演示Django的路由映射功能。 1）首先在djangosite/app/views.py中建立一个路由响应函数： from django.http import HttpResponsedef welcome(request):...
View ArticlePython数据类型之“序列概述与基本序列类型(Basic Sequences)”
列是指有序的队列，重点在"有序"。 一、python中序列的分类 Python中的序列主要以下几种类型： 3种基本序列类型(Basic Sequence Types)：list、tuple、range 专门处理文本的附加序列类型(Text Sequence Types)：str 专门处理二进制数据的附加序列类型(Binary Sequence Types):...
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Compiling a $22 Logic Analyzer
On my way to this year’s Hackaday SuperConference I saw an article on EE Times about someone taking the $22 Lattice iCEstick and turning it into a logic analyzer complete with a python app to display...
View ArticlePython 2 is Stupid
I don't really think that python 2 is stupid, having used it for some years. It's the first programming language that I really came to love; heck, it's the foundation of my career. Python is going...
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Local Django on Kubernetes with Minikube
Minikube It’s been over half a year since I last wrote aboutDjango on Kubernetes, along with Postgres and Redis containers, and I wanted to update it to talk about one of the most exciting projects to...
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“How I Interview Data Scientists” with Matt Fornito
This post was originally published here by Matt Fornito | December 13, 2016 This interview is featured in Springboard’s guide to data science interviews. Matt is also a mentor for Springboard’s Data...
View ArticlePython中如何计算两个日期之间的天数？
=Start= 缘由： 在程序中用到和日期相关的循环时，可能会需要提前确定两个日期之间的天数；还有就是在日常的一些记录中也会想了解两个日期之间的天数；总之，这样的需求是很多的。 正文： 参考解答： >>> from datetime import date >>> a = date( 2011 , 11 , 24 ) >>> b = date(...
View ArticlePython中如何快速进行多个字符的替换
=Start= 缘由： 在工作中碰到了这么一个问题，记录一下解决方案及其过程，方便以后参考。 正文： 参考解答： 先给出结论： 要替换的字符数量不多时，可以直接链式replace()方法进行替换，效率非常高； 如果要替换的字符数量较多，则推荐在 for 循环中调用 replace() 进行替换。 可行的方法： 1. 链式replace() string.replace().replace() 1.x...
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跟着老男孩教育学Python开发【第四篇】：模块
双层装饰器示例 __author__ = 'Golden' #!/usr/bin/env python # -*- coding:utf-8 -*- USER_INFO = {} def check_login(func): def inner(*args,**kwargs): #如果不存在给定默认值None if USER_INFO. get (" is_login ",None): ret =...
View ArticleExperienced Django: Build Tools
I’m doing a survey for build tools in python. Now, before any of you say “make”, be warned that I’ve been doing C and C++ programming for decades and even those project don’t even use make anymore if...
View Article我的2016年总结
起步 2016年就要结束了，大学生涯也在这一年结束了，自从去年有写博客的想法，现在感觉记录真是一件很有用的东西。 一月 这个月忙于认知实习的一些答辩工作，回公司实习了大概两周，学校寒假了，我也没地方住了，请假回家啦，顺便带着波波去我那玩了几天。 二月 过春节，玩游戏，看直播，吃零食，见基友，月底回学校。 三月...
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初学Python，看这些书够了！
初学python，看这些书够了！ 一点号大圣众包4小时前 “不经一番寒彻骨,怎得梅花扑鼻香。”穷到吃土，却还想着升职加薪当上CEO迎娶白富美攀上人生巅峰，但是又懒散不学习，这很不科学。迎接大数据浪潮，大家可以从大数据技术的教学书籍上下手，早日脱离苦海，今天我们大圣众包小编继续为大家精选几本python的书籍！ php?url=0FDIDj8lT0" alt="初学Python，看这些书够了！"...
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How a BBC Data Unit Scraped Airport Noise Complaints
I’d wondered for a while why no one who had talked about scraping at conferences had actually demonstrated the procedure. It seemed to me to be one of the most sought-after skills for any...
View ArticlePython之路【第十九章】：Django 数据库对象关系映射
Django ORM基本配置 到目前为止，当我们的程序涉及到数据库相关操作时，我们一般都会这么搞： 创建数据库，设计表结构和字段 使用 mysqldb 来连接数据库，并编写数据访问层代码 业务逻辑层去调用数据访问层执行数据库操作 django为使用一种新的方式，即：关系对象映射（Object Relational Mapping，简称ORM），django中遵循 Code Frist...
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JSON WEB TOKEN BASED Authentication Backend for Django Project
In our last post we gave a detailed description about JSON Web Tokens. In this post we are going to show a sample JSON Web Token Authentication mechanism with the Django Web Framework. Owasp defines...
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Working with zip files in Python
This article explains how one can perform various operations on a zip file using a simple python program. What is a zip file? ZIP is an archive file format that supports lossless data compression. By...
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Setup Microservices Architecture in Python with ZeroMQ & Docker
Microservices - What? Microservices are an architectural style in which multiple, independent processes communicate with each other. These processes are designed to be highly scalable, are de-coupled...
View Articlenumpy常用用法总结
numpy 简介 numpy的存在使得python拥有强大的矩阵计算能力，不亚于matlab。 官方文档( https://docs.scipy.org/doc/numpy-dev/user/quickstart.html ) 各种用法介绍 首先是numpy中的数据类型，ndarray类型，和标准库中的array.array并不一样。 ndarray的一些属性 ndarray.ndim the...
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