Python Django Intro V0.1
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This document provides an introduction to Python and the Django web framework. It discusses how Python is a modern, versatile programming language used by many large companies. It also summarizes how Django is a leading Python web framework that emphasizes clean design patterns while also allowing for fast development to meet deadlines. Code demonstrations are provided for common Python and Django features.
Python Django Intro V0.1
- 1. Introduction to Python & Django Udi h Bauman, Tikal Knowledge
- 2. Personal background 1994 - 2002 - 1997 - 2004 - 1999 - 2005 -
- 3. Also in 2004 ● Didn't listen to smart people :( – Chief architect of a large innovative company told me to dump Java & switch to Python ● Citing Paul Graham saying that Java is a dead leaf in the evolutionary tree of programming languages
- 4. 2006 - & ● Smiling ever since ● “People who've made the switch to dynamic languages such as Python seem much, much happier.” – Bruce Eckel, Author of “Thinking in Java” & “Thinking in Python”
- 5. Python, WTF? ● Isn't this some scripting language for system administrators & the like? What does it have to do with us – serious Java & .Net programmers???
- 6. Python, WTF? ● Python is a modern programming language. – Pure OOP (Object Oriented Programming) – Pure AOP (Aspect Oriented Programming) – Pure FP (Functional Programming)
- 7. Python, WTF? ● Some companies & organization attract the best programmers in the world ● E.g.
- 8. Python, WTF? ● Turns out that the programming language of choice in most of these places is Python ● E.g.
- 9. Quotes ● “Python has been an important part of Google since the beginning, and remains so as the system grows and evolves” – Peter Norvig, Director of Research, Google
- 10. Quotes ● “Python is fast enough for our site and allows us to produce maintainable features in record times, with a minimum of developers” – Cuong Do, Engineering Manager, YouTube (Watch the video: http://bit.ly/youtube_scalability)
- 11. The reason, IMHO ● Python offers the optimal combination of Power & Simplicity – perfect for coding Business Logic – perfect for any software at any size & complexity
- 12. Python demo ● Arithmetic's & ● Functions Strings ● Doctest ● Introspection ● Classes ● Formatting ● List comprehension ● Lists, Tuples & ● I/O Dictionaries ● Blocks, If & loops
- 13. Demo screenshots
- 14. Demo screenshots
- 15. Python libraries ● Real wealth of libraries ● The Python Package Index (PyPi) lists 7.7K ● Cover almost any functionality & need ● Very easy to install ● Very intuitive – Work just as you expect them to work
- 16. Python summary ● Python has many advantages, but the bottom line is: – Happy management – Happy staff – Happy customers ● Don't take my word – Google what people say about their experience with Python & tell me if you find any counter-example
- 17. Python summary ● What's in it for us? – Need implement a new complex system or service? – Prototype it in Python – Then realize that it's ready for usage
- 18. Introduction to Django ● Leading Python Web Framework ● Good for any service, no just Web apps
- 19. Django slogan ● The Web framework for Perfectionists with deadlines
- 20. Perfectionists? ● Emphasizing clean MVC design ● Django apps are reusable by design ● Based on Best-Practices ● Extremely easy to unit-test
- 21. Deadlines? ● Growned in the Online Newspapers industry – Designed to make development fast ● E.g., automatic admin interface ● Automates repetitive tasks ● Leading technology in new US Startups, according to recent polls
- 22. Quotes ● “After an extensive trade study, we selected Django as the first and primary application environment for the Nebula Cloud. ” – NASA, http://nebula.nasa.gov/services/framework
- 23. Model & basis of
- 24. Main features ● ORM ● Reusable apps ● Admin ● Unit testing ● URL's design ● Middleware ● Auth ● Caching ● Template engine ● I18N ● Integrated GIS
- 25. Comparison with Java stacks
- 26. Lots of reusable apps ● Hundreds of pluggable apps exist, for almost any purpose ● Very easy to plug into your project – Adds complete functionality, integrated with your application
- 27. How do you develop/run? ● I use the Eclipse-based Aptana IDE ● I run Django on LAMP (Linux, Apache, MySQL/Postgres, Python) or AppEngine – You can also deploy Django as .war on any Java Application Server
- 28. Django demo ● Let's write a small Django app for project management – Manage projects & tasks – Manage users & roles – Rich UI (search, filters, recent actions list) – Project health indicators – Tasks focus chart
- 29. Demo screenshots
- 30. Demo screenshots
- 31. Demo screenshots
- 32. Demo screenshots
- 33. Java/.Net vs. Django ● Think how much code it would take in Java or .Net – Common – BI – DAL – Basic – Logic – API
- 34. Java/.Net vs. Django ● Damn, Django does the same thing without all the complexity & verbosity ● How much time & cognitive effort it takes to learn, understand & modify it?
- 35. Django summary ● What's in it for us? – Nothing ● you can afford developing systems using 10 developers for several weeks ● instead of 1-2 developers for several days :)
- 36. Django summary ● Seriously: – Need implement a new system? – Prototype it in Django in a few hours – Then realize that it's ready for production