spaceship20008的专栏

这是《python 编程实践》这本书，第九章，最后一道题，14题。稀疏向量(sparse vector)就是其元素几乎都为0的那种向量，比如[1,0,0,0,0,0,3,0,0,0] 如果将这些0 都保存到列表中实在是有些浪费存储内存。因此程序员常常会利用字典来保存其中的非零元素。比如说，刚才那个向量会写成{0:1, 6:3}, 这是因为， 该向量位置0处的值为1, 位置6 处的值为3.a

原帖地址：http://blog.youkuaiyun.com/dengxu11/article/details/6763765本文主要讲解下，让Vim能正确显示和保存各种编码文件的一些常用方法。Vim编码配置里面有3个选项，分别是encoding 、fileencodings、fileencoding 简写分别对应为enc、fencs、fenc。encoding(enc)

A web framework of pythonOperationing enviroment : A virtual OS of Archlinux of Python3.3what is it? http://docs.pylonsproject.org/projects/pyramid/en/latest/index.htmlhow to install htt

Raspberry Pi GPIO with Python (without root)While playing around with the raspberry pi I wanted to try out the GPIO function. I decided I wanted to use python to control the pins. I found several

hello world!http://webpy.org/Get Startedweb.py 0.37 is the latest released version of web.py. You can install it by running:sudo easy_install web.pyOr to get the latest development ve

工作了一个凌晨制作完成的，有帮助于理解pyramid web framework structure必要的东西有注释。Hours of time were spent in the early morning after midnight on making this diagram. It's helpful to understand the structure of pyramid

pyramid.The default templates engine of Pyramid web framework is chameleno which is frustrating to read and write.And another guy in #pyramid called sontek suggested me to use mako http://

http://docs.pylonsproject.org/projects/pyramid/en/1.4-branch/narr/install.html按照介绍操作。我用的是mint13, python 3.2.3版本。使用的是virtualenv 开发工具 在一个虚拟的python环境下开发web app这样很不错。请按照其步骤来。在p

It's from http://docs.pylonsproject.org/projects/pyramid/en/latest/narr/project.html#manifest-inScaffolds Included with Pyramid¶The included scaffolds are these:starterURL mapping via UR

5. Data StructuresThis chapter describes some things you’ve learned about already in more detail, and adds some new things as well.5.1. More on ListsThe list data type has some more me

5.5. DictionariesAnother useful data type built into Python is the dictionary (see Mapping Types — dict). Dictionaries are sometimes found in other languages as “associative memories” or “associat

摘一段笔记：These passages come from a book named " A byte of Python"It's a open book which is very helpful when someone is learning python programming.Tip: if anyone wants to learn python very we

Chapter 17  Classes and methodsThe link of this chapter of the book ThinkPythonhttp://www.greenteapress.com/thinkpython/html/book018.html17.1  Object-oriented featuresPython is an obje

There are something i copied from :http://www.greenteapress.com/thinkpython/thinkCSpy/html/chap14.html这本书叫thinkpythonThese would be very helpful :D14.7 Points revisitedLet's rewrite

5.3. Tuples and SequencesWe saw that lists and strings have many common properties, such as indexing and slicing operations. They are two examples of sequence data types (see Sequence Types — li

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5.4. SetsPython also includes a data type for sets. A set is an unordered collection with no duplicate elements. Basic uses include membership testing and eliminating duplicate entries. Set objects

4.4.1. Bitwise Operations on Integer Types （数位操作）Bitwise operations only make sense for integers. Negative numbers are treated as their 2’s complement value (this assumes a sufficiently large numb

9.2. Python Scopes and Namespaces¶Before introducing classes, I first have to tell you something about Python’s scope rules. Class definitions play some neat tricks with namespaces, and you need t

youtube视频http://www.youtube.com/watch?v=L2KSsqwwH9M&list=PL6-GrNvaJuAhcBuzrL6UR-LhDbNkNhFwv这个人的博客：http://fosshelp.blogspot.inthe offical ariticle for creating a web application of pyramid : http:/