Pylons: Powerful Web Development

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Pylons Powerful Web Development
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Abstractions

• A web application framework is a software
  framework that is designed to support the
  development of dynamic websites, web
  applications, and web services. The framework
  aims to alleviate the overhead associated with
  common activities used in web development.

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Why Pylons?

• Interactive debugging
• Paster shell
• Easy URL Routing
• No magic

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Installing

• easy_install pylons

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Architecture
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What were interested in

• Model-View-Controller
• Model Manages the behavior and data of the
  application domain
• View Manages the presentation of the model
• Controller Interprets requests, assembles data
  provided by model and performs data binding in
  support of the view

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Paste

• Provides a framework for creating WSGI middleware
• Development web server
• To create a new project, run
• paster create t pylons mymarks

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Directory structure

• /data/templates
• /mymarks/config
• /mymarks/lib
• /mymarks/public
• /mymarks/tests
• /mymarks/model, controllers, templates

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Model - SqlAlchemy

• Basic idea
• Create tables
• Create classes
• Map classes to tables
• Use high-level language to interact with model,
  instead of interacting with database with SQL

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Controller

• paster controller bookmarks

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Routes

• In config/routes.py

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Request walkthrough
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Interactive Debugger

• Test_debug

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Paster shell

• IPython!
• Useful for interacting with models in the context
  of your pylons app

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WebHelpers Goodies

• link generation (js, css, image)
• tools.mail_to

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Fin

• Resources
• http//pylonshq.com/docs/en/0.9.7/
• http//www.sqlalchemy.org/docs/05/index.html