Why Python Frameworks Are Changing the Web Joel Burton [email_address] Pycon New Zealand 2009

Long, Long Ago...

Avert Your Gaze! <H1><! print $title; !></H1> <UL> <% SELECT name FROM friends %> <LI><! print $name; !></LI> </UL>

“ Beautiful is better than ugly ”

“ Experience is simply the name we give our mistakes ” ― Oscar Wilde

Zope 3 “ Explicit is better than implicit . ”

Grok! “ Although practicality beats purity . ”

“ I’m not a Plone evangelist . I’m a Plone survivor .” ― Chris Calloway ttw rich editing versioning custom content types form generation app dev tools caching systems theming ajax add ons

repoze.bfg “ Do as little as possible , but do it well ! ”

N y e t w o r k s “ It’s so easy to write a web framework in Python, why would you use someone else’s?”

Attribute-Based Templates Zope Page Templates, Genshi, ... <h1 tal:replace =&quot;title&quot; > [title here] </h1> <ul> <li tal:replace =&quot;friend friends&quot; tal:content =&quot;friend/name&quot; > [friend] </li> </ul>

Codelined Templates Mako, Jinja, Cheetah, ... <table> #for $client in $clients <tr> <td> $client.surname, $client.firstname </td> <td> <a href=&quot;mailto: $client.email &quot;> $client.email </a> </td> </tr> #end for </table>

Deliverance <prepend theme=&quot;//head&quot; content=&quot;//head/link&quot; nocontent=&quot;ignore&quot; /> <append-or-replace theme=&quot;//head&quot; content=&quot;//head/title&quot; nocontent=&quot;ignore&quot; /> <copy theme=&quot;//div[@id='container']&quot; content=&quot;//div[@id='region-content']/div[3]&quot; /> * check it out! http://www.coactivate.org/projects/deliverance

URL -> Database? /path/to/folder/in/database

… or take a route? urlpatterns = patterns('', (r'^articles/2003/$', 'news.views.special_case_2003'), (r'^articles/(d{4})/$', 'news.views.year_archive'), (r'^articles/(d{4})/(d{2})/$', 'news.views.month'), (r'^articles/(d{4})/(d{2})/(d+)/$', 'news.views'), )

ZODB

Object-Relational Mappers SQLObject SQLAlchemy ...

“ The Internet is... a series of tubes . ” ― Ted Stevens, US Senator, Alaska WSGI * start here: http://archimedeanco.com/wsgi-tutorial/

do repeat yourself http://pypi.python.org/pypi/zc.buildout apache varnish pound squid supervisor backup

how did we get here?

*security “ PHP isn’t a bad language . It’s just used by bad people .”

CVEs in Last 3 Years http://plone.org/products/plone/security

the results? Powered by Plone

Testing “ Untested code is broken code.” repoze.bfg has 100% test coverage

interfaces & adapters

culture “ Readability counts.”

Conferences Plone Conference, Naples, Italy

Friends in High Places

Componentizing our code Relicensing project Sharing widely with repoze & grok Loving interfaces/adapters Broadening test coverage Integrating AJAX frameworks Innovating in UI concepts

so... what can you do? “ mr. lyle”

… thanks! PyCon New Zealand Tim Knapp The Plone Foundation Chris Calloway Photo Credits: http://www.flickr.com/photos/alf07/ http://www.flickr.com/photos/thetruthabout http://www.flickr.com/photos/chavals http://www.flickr.com/photos/32530713@N08 http://www.flickr.com/photos/caveman_92223 http://www.flickr.com/photos/santos http://www.flickr.com/photos/atomicshed http://www.flickr.com/photos/vidio All images taken by author or from above Creative Commons-licensed works.

Have a great conference & keep in touch: [email_address]