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Variables and Types - Learn Python - Free Interactive Python Tutorial Python is completely object oriented, and not "statically typed". You do not need to declare variables before using them, or declare their type. Every variable in Python is an object. This tutorial will go over a few basic types of variables. Numbers Python supports two types of numbers - integers and floating point numbers. To define an integer, use the following syntax: myint = 7 Execute Code To define a floating point number, you may use one of the following notations: myfloat = 7.0 myfloat = float(7) Strings Strings are defined either with a single quote or a double quotes. mystring = 'hello' mystring = "hello" The difference between the two is that using double quotes makes it easy to include apostrophes (whereas these would terminate the string if using single quotes) mystring = "Don't worry about apostrophes" There are additional variations on defining strings that make it easier to include things such as carriage returns, backslashes and Unicode characters. a, b = 3, 4 # This will not work!

Online Python Tutor 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

How to Think Like a Computer Scientist — How to Think Like a Computer Scientist: Learning with Python 2nd Edition documentation Navigation How to Think Like a Computer Scientist¶ Learning with Python¶ 2nd Edition (Using Python 2.x) by Jeffrey Elkner, Allen B. Downey, and Chris Meyers Last Updated: 21 April 2012 Copyright NoticeForewordPrefaceContributor ListChapter 1 The way of the programChapter 2 Variables, expressions, and statementsChapter 3 FunctionsChapter 4 ConditionalsChapter 5 Fruitful functionsChapter 6 IterationChapter 7 StringsChapter 8 Case Study: CatchChapter 9 ListsChapter 10 Modules and filesChapter 11 Recursion and exceptionsChapter 12 DictionariesChapter 13 Classes and objectsChapter 14 Classes and functionsChapter 15 Classes and methodsChapter 16 Sets of ObjectsChapter 17 InheritanceChapter 18 Linked ListsChapter 19 StacksChapter 20 QueuesChapter 21 TreesAppendix A DebuggingAppendix B GASPAppendix c Configuring Ubuntu for Python DevelopmentAppendix D Customizing and Contributing to the BookGNU Free Document License Search Page © Copyright 2010, Jeffrey Elkner, Allen B.

Online Python exercises I've been thinking about online Python learners. There have been some cool examples of online code exercises, like Nathan's Javascript Lessons. These are great because they require absolutely no setup, and can run right on the web page that describes the concepts involved. But of course, it's easy to run Javascript in a browser. What are the options for doing something similar for Python? CodingBat provides exercises for Java and Python. Another server-side solution is the NCSS Challenge, which uses an elaborate sandboxing technique on the server to run arbitrary Python code. There are other server-side online Python execution pages: Server-side execution solve the problem of executing Python, but introduces the new problem of keeping the server safe. Try Python is an in-browser Python implementation using IronPython running in Silverlight. Reviewing all these possibilities, none are perfect, and some are far from it. Are there other possibilities?

News Tutorial - Learn Python in 10 minutes NOTE: If you would like some Python development done, my company, Stochastic Technologies, is available for consulting. This tutorial is available as a short ebook. The e-book features extra content from follow-up posts on various Python best practices, all in a convenient, self-contained format. Preliminary fluff So, you want to learn the Python programming language but can't find a concise and yet full-featured tutorial. Properties Python is strongly typed (i.e. types are enforced), dynamically, implicitly typed (i.e. you don't have to declare variables), case sensitive (i.e. var and VAR are two different variables) and object-oriented (i.e. everything is an object). Getting help Help in Python is always available right in the interpreter. >>> help(5)Help on int object:(etc etc) >>> dir(5)['__abs__', '__add__', ...] >>> abs. Syntax Python has no mandatory statement termination characters and blocks are specified by indentation. Data types You can access array ranges using a colon (:).

Become a Programmer, Motherfucker If you don't know how to code, then you can learn even if you think you can't. Thousands of people have learned programming from these fine books: Learn Python The Hard Way Learn Ruby The Hard Way Learn Code The Hard Way I'm also working on a whole series of programming education books at learncodethehardway.org. Learn C The Hard Way Learn SQL The Hard Way Graphics Programming Language Agnostic NerdDinner Walkthrough Assembly Language Bash Clojure Clojure Programming ColdFusion CFML In 100 Minutes Delphi / Pascal Django Djangobook.com Erlang Learn You Some Erlang For Great Good Flex Getting started with Adobe Flex (PDF) Forth Git Grails Getting Start with Grails Haskell Java JavaScript JavaScript (Node.js specific) Latex The Not So Short Introduction to LATEX (perfect for beginners) Linux Advanced Linux Programming Lisp Lua Programming In Lua (for v5 but still largely relevant)Lua Programming Gems (not entirely free, but has a lot of free chapters and accompanying code) Maven Mercurial Nemerle Nemerle NoSQL Oberon Objective-C

Python 2.4 Quick Reference Style chooser: Modern, Modern B&W, Classic, High contrast or Printing [Hint: Use styles Modern B&W or Printing to print. If you get problems, try printing the PDF versions instead] Contents Front matter Version 2.4 Check updates at Creative Commons License. Last modified on May 8, 2007 17 Feb 2005, upgraded by Richard Gruet for Python 2.4 03 Oct 2003, upgraded by Richard Gruet for Python 2.3 11 May 2003, rev 4 upgraded by Richard Gruet for Python 2.2 (restyled by Andrei) 7 Aug 2001 upgraded by Simon Brunning for Python 2.1 16 May 2001 upgraded by Richard Gruet and Simon Brunning for Python 2.0 18 Jun 2000 upgraded by Richard Gruet for Python 1.5.2 30 Oct 1995 created by Chris Hoffmann for Python 1.3 Color coding: Features added in 2.4 since 2.3. Originally based on: Python Bestiary, author: Ken Manheimer Python manuals, authors: Guido van Rossum and Fred Drake python-mode.el, author: Tim Peters and the readers of comp.lang.python Useful links : Keywords Numbers

James Somers – Web developer money There’s this great moment in the documentary Jiro Dreams of Sushi (2011) when the world’s most celebrated sushi chef turns to his son, who is leaving to start his own restaurant, and says: ‘You have no home to come back to.’ Which, when you think about it, isn’t harsh or discouraging but is in fact the very best thing you could say to someone setting out on an adventure. Last October I quit my job to become a freelance journalist. I had only ever made about $900 from writing, but my latest project, a profile of Douglas Hofstadter, had attracted interest from a couple of big American magazines. I stood to make anywhere between $10,000 and $20,000 from the piece. My plan was to sell that profile and keep writing others like it. Get Aeon straight to your inbox My new life began on a Monday. When, in 1958, Ernest Hemingway was asked: ‘What would you consider the best intellectual training for the would-be writer?’ I worked on my Hofstadter piece until early Thursday afternoon.

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