Python en:Object Oriented Programming - Notes Introduction In all the programs we wrote till now, we have designed our program around functions i.e. blocks of statements which manipulate data. This is called the way of programming. There is another way of organizing your program which is to combine data and functionality and wrap it inside something called an object. Classes and objects are the two main aspects of object oriented programming. Note for Static Language Programmers Note that even integers are treated as objects (of the int class). C# and Java 1.5 programmers will find this similar to the concept. Objects can store data using ordinary variables that to the object. Fields are of two types - they can belong to each instance/object of the class or they can belong to the class itself. A class is created using the class keyword. The self Although, you can give any name for this parameter, it is that you use the name self - any other name is definitely frowned upon. Note for C++/Java/C# Programmers Classes #! Output: #! Example:
Bottle: Python Web Framework — Bottle 0.11.dev documentation Bottle is a fast, simple and lightweight WSGI micro web-framework for Python. It is distributed as a single file module and has no dependencies other than the Python Standard Library. Routing: Requests to function-call mapping with support for clean and dynamic URLs.Templates: Fast and pythonic built-in template engine and support for mako, jinja2 and cheetah templates.Utilities: Convenient access to form data, file uploads, cookies, headers and other HTTP-related metadata.Server: Built-in HTTP development server and support for paste, fapws3, bjoern, Google App Engine, cherrypy or any other WSGI capable HTTP server. Example: “Hello World” in a bottle from bottle import route, run, template @route('/hello/<name>')def index(name): return template('<b>Hello {{name}}</b>!' Run this script or paste it into a Python console, then point your browser to Download and Install User’s Guide Knowledge Base A collection of articles, guides and HOWTOs. License Footnotes
Online Python Tutor - Visualize program execution Write your Python code here: x = [1, 2, 3] y = [4, 5, 6] z = y y = x x = z x = [1, 2, 3] # a different [1, 2, 3] list! x.append(4) y.append(5) z = [1, 2, 3, 4, 5] # a different list! x.append(6) y.append(7) y = "hello" def foo(lst): lst.append("hello") bar(lst) def bar(myLst): print(myLst) foo(x) foo(z) [Optional] Please answer these questions to support our research and to help improve this tool. Options: Execute code using , , , , , and . Here are some example Python code snippets to visualize: Basic: hello | happy | intro | filter | tokenize | insertion sort Math: factorial | fibonacci | memoized fibonacci | square root | gcd | towers of hanoi User Input: raw input Objects: OOP 1 | OOP 2 | OOP 3 | inheritance Linked Lists: LL 1 | LL 2 | LL sum Pointer Aliasing:aliasing 1 | aliasing 2 | aliasing 3 | aliasing 4aliasing 5 | aliasing 6 | aliasing 7 | aliasing 8 | sumList Higher-Order Functions: closure 1 | closure 2 | closure 3 | closure 4 | closure 5list map | summation | lambda param | student torture
TurboGears: Front-to-Back Web Development 5. Object Oriented Programming — Python Practice Book 4.1. State Suppose we want to model a bank account with support for deposit and withdraw operations. One way to do that is by using global state as shown in the following example. balance = 0 def deposit(amount): global balance balance += amount return balance def withdraw(amount): global balance balance -= amount return balance The above example is good enough only if we want to have just a single account. We can solve the problem by making the state local, probably by using a dictionary to store the state. With this it is possible to work with multiple accounts at the same time. >>> a = make_account()>>> b = make_account()>>> deposit(a, 100)100>>> deposit(b, 50)50>>> withdraw(b, 10)40>>> withdraw(a, 10)90 4.2. 4.3. Let us try to create a little more sophisticated account type where the account holder has to maintain a pre-determined minimum balance. class MinimumBalanceAccount(BankAccount): def __init__(self, minimum_balance): BankAccount. Example: Drawing Shapes 4.4. 4.5.
Building a blog in 30 mins with Django (Screencast) | arunrocks.com Just uploaded a quick screencast showing how to build a blog in Django in just 30 minutes (plus a couple of seconds :) ). It shows off a lot of new features that we have in Django since 1.2. It basically covers: Using django.contrib.admin to create fully-featured admin pagesAdding tags to posts easily using taggit appClass-based generic views for rapidly building pages (New in Django 1.3)Using template inheritance and filtersLeveraging django.contrib.syndication for a simple feed It is best to watch it directly at Youtube in HD. I plan to add a short bonus video soon demonstrating how this bare-bones blog can be restyled into a modern-looking HTML5 site (UPDATE: Bonus video is up now). UPDATE: The source code for the created project has been uploaded to github Arun Ravindran Hi!
home page Modern, scalable and powerful Productivity first and foremost Loved by business, devs and IT Build and orchestrate integration services, expose new or existing APIs, either cloud or on-premise, and use a wide range of connectors, data formats and protocols. Zato facilitates intercommunication across applications and data sources spanning your organization's business or technical boundaries and beyond, enabling you to access, design, develop or discover new opportunities and processes. Implemented in Python, a modern programming language famous for its increased productivity. Increased productivity lets Zato-based solutions achieve faster time to market simultaneously simplifying production operations and costs of support. A powerful GUI enables rapid management of resources and simplifies the understanding of events and transactions flowing through the integration platform giving you an immediate insight into all the information.
CSS Tip: Get Any Font You Want CSS Tip: Get Any Font You Want by Larisa Thomason, Senior Web Analyst, NetMechanic, Inc. Have your heart set on using a particular font on your site? You may think your online video sales Web site won't be complete without the "Showtime" font. If your page requires an unusual font, you can embed it with a Cascading Style Sheet (CSS). Why Use Embedded Fonts? Because a font is an operating system resource, not a browser resource. From a page designer's perspective, this is a big weakness. That's where embedded fonts come in: with them, you don't have to worry about browsers defaulting to a more common font. Apply the font by name to your page using either the <FONT FACE> tag or the FONT-FAMILY property in CSS1. Embedding a font is a 3-step process: 1. Finding fonts is easy. Do some research first though: some designers don't allow their fonts to be embedded. 2. Recently though, Netscape updated its method to support Explorer browsers. Create embedded fonts using one of 2 available formats:
A Virtual Exit Chapter 1: Introduction to Django This book is about Django, a Web development framework that saves you time and makes Web development a joy. Using Django, you can build and maintain high-quality Web applications with minimal fuss. At its best, Web development is an exciting, creative act; at its worst, it can be a repetitive, frustrating nuisance. Django lets you focus on the fun stuff – the crux of your Web application – while easing the pain of the repetitive bits. The goal of this book is to make you a Django expert. What Is a Web Framework? Django is a prominent member of a new generation of Web frameworks – but what does that term mean, precisely? To answer that question, let’s consider the design of a Web application written in Python without a framework. One of the simplest, most direct ways to build a Python Web app from scratch is to use the Common Gateway Interface (CGI) standard, which was a popular technique circa 1998. #! But despite its simplicity, this approach has a number of problems and annoyances.
Python Programming Language – Official Website Rediscovering the Button Element Introduction Creating a consistent interface for your users is a constant struggle for every application designer. Building consistency on the web is especially tough because the visual rendering differences across browsers and operating systems are wildly different and almost arbitrary in what can and cannot be done. No where does this become more apparent than when you’re dealing with form elements and the biggest loser of them all in the battle for a standardized look is the infamous Submit button. As is, the input with the type=”submit” is either too ugly (Firefox), a little buggy (Internet Explorer) or completely inflexible (Safari). The solution for most is to use image inputs and create the damn things ourselves. Inputs vs Buttons So, here’s your standard submit button markup: And it looks like this across the three brothers: Meh. <button type="submit">Submit</button> And it looks like this : These buttons work and behave in exactly the same way as our counterparts above. Nice. The CSS