The goodies of zope, pyramid, and plone (2)
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The goodies of zope, pyramid, and plone (2)

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8 goodies you can take away, in any web or non web python project.

8 goodies you can take away, in any web or non web python project.

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The goodies of zope, pyramid, and plone (2) The goodies of zope, pyramid, and plone (2) Presentation Transcript

  • The goodies that Zope begat Pyramid, Plone, buildout + more Dylan Jay @djay75
  • Who am I? Dylan Jay Core Plone Contributor 1995 First web app (ISAPI) 1999 Built first e-commerce site (zope) 2003 Built first startup (IntroVino) 2004 Started PretaWeb/PretaGov (Plone0
  • Reasons for this talk History "Those who don't learn from history are doomed to add it as a feature of their framework" Better choices There is no perfect framework, only a perfect mess when you pick wrong Reuse
  • The goodies 1. Traversal 2. ZODB 3. ZTK Adapters 4. Sprints 5. Pyramid 6. Buildout 7. Plone + the customisation cliff 8. Diazo 9. RobotFramework - RobotSuite
  • Python family tree(web) Zope (1996-) ZTK (BlueBream) (2004-) Pylons/TurboGears (2005-2010)Django (2005-) Flask (2010-) RoR (2004-) Plone (1999-) BFG (2008-2010) CGI (1993-) httpd (1990-) NikolaPyramid (2010-)
  • Zope - wtf was that about? Back in 1996 ● webserver = path to file ● cgi = path to script + args ● OO - was very big ● Jim Fulton was on a plane traversal = path to object + '/' + method zope = zope object publishing environment
  • Goodie #1 - Traversal response = traverse(root, HTTP_PATH.split('/'), request) def traverse(context, path, request): if len(path) == 0: return context(request) elif len(path) == 1: view_method = getattr( context, path[0] ) return view_method(request) else: sub_context = context[ path[0] ] return traverse( sub_context, path[1:], request)
  • Traversal - why? Good for CMS plugins cooperating webapps complex apps TraversalRoutes /A/B/C/myaction/myaction/id123 distributedcentrally defined Good for relational single use apps
  • Goodie #2: ZODB ● Want to store something non relational? ● Want to store something non key-value? ● Got complex object structures? Use Object persistence
  • ZODB: The piss easy DB $ easyinstall ZODB db = DB( FileStorage.FileStorage('./Data.fs') ) connection = db.open() dbroot = connection.root() transaction.commit() db.close() dbroot['a_number'] = 3 dbroot['a_string'] = 'Gift' dbroot['a_list'] = [1, 2, 3, 5, 7, 12] dbroot['a_dictionary'] = { 1918: 'Red Sox', 1919: 'Reds' } dbroot['deeply_nested'] = { 1918: [ ('Red Sox', 4), ('Cubs', 2) ], 1919: [ ('Reds', 5), ('White Sox', 3) ], }
  • ZODB: simple but powerful ● transactions - multiversion concurrency control (MVCC) ● scalability across a network (using ZEO) ● replication (using ZRS or relstorage) ● history/undo ● transparently pluggable storage ● built-in caching ● Blob support
  • Goodie #3: Adapters
  • Adapters: why? ● Solves how to plug complex software together ● Better than Object Orientation ● Perfect for overridable software ● Perfect for plugin architecture ● ZTK - ZCA - Zope3 == Adapters
  • ZTK Adapters class IUSPlug(zope.interface): prongs = Attribute("""number of prongs""") class Motox(object): implements(IUSPlug) prongs = 2 class INZPlug(zope.interface): prongs = Attribute("""number of prongs""")
  • ZTK Adapters class ACPowerAdapter(object): implements(INZPlug) adapts(IUSPlug) def __init__(self, plug): self.prongs = plug.prongs + 1 self.voltage = 240 registry.registerAdapter(ACPowerAdapter)
  • ZTK Adapters >>> myphone = MotoX() >>> myphone.prongs == 3 False >>> adaptedphone = INZPlug(myphone) >>> adaptedphone.prongs == 3 True
  • Goodie #4: Sprints “The practice of using sprints for open source software development was pioneered by the Zope Corporation in the early days of the Zope 3 project. Between January 2002 and January 2006, more than 30 Zope 3 sprints had taken place.[citation needed]” Plone Pacific Rim Sprint 14-15 Sept
  • Goodie #5 Pyramid Zope (1996-) ZTK (BlueBream) (2004-) Pylons/TurboGears (2005-2010)Django (2005-) Flask (2010-) RoR (2004-) Plone (1999-) BFG (2008-2010) CGI (1993-) httpd (1990-) NikolaPyramid (2010-)
  • Pyramid: It's micro! from wsgiref.simple_server import make_server from pyramid.view import view_config from pyramid.config import Configurator if __name__ == '__main__': config = Configurator() config.add_route('hello', '/hello/{name}') config.scan() app = config.make_wsgi_app() server = make_server('0.0.0.0', 8080, app) server.serve_forever() @view_config(route_name='hello', renderer='json') def hello_world(request): return {'content':'Hello %(name)s!' % request.matchdict}
  • Pyramid: worst name ever Pyramid (the structure) Pyramid (the framework) Start big - End small Start small - End big Ancient Best of breed Unchanging over time Extensible & Flexible
  • Pyramid: a "micro & more" Framework ● a declarative authorization system ● extensibility: aggregate Pyramid application configuration from multiple sources ● separate I18N translation string factories ● reuse: "Interface" based view/subscriber registrations ● optionally map URLs to code using traversal
  • Pyramid: routes vs. traversal: why not both? from wsgiref.simple_server import make_server from pyramid.config import Configurator from pyramid.response import Response class Resource(dict): pass def get_root(request): return Resource({'a': Resource({'b': Resource({'c': Resource()})})}) def hello_world_of_resources(context, request): output = "Here's a resource and its children: %s" % context return Response(output) if __name__ == '__main__': config = Configurator(root_factory=get_root) config.add_view(hello_world_of_resources, context=Resource) app = config.make_wsgi_app() server = make_server('0.0.0.0', 8080, app) server.serve_forever()
  • Goodie #6: buildout buildout - what you get if you put make, puppet, python, pip, virtualenv into a blender
  • Buildout ● uses recipes - python packages that know how to build other things ○ like puppet ● automated dependencies ○ like Make ● recipes download and install python packages into your environment ○ like PIP/easy_install ● everything gets installed into a local directory isolated from your system ○ like virtualenv
  • Buildout is like... you need it when - you’re on tour (deploy different places) - very different components
  • Goodie #7: Plone 300+ core contributors 400+ plugins 1000+ commits/month 5-8 sprints per year 1 Plone foundation 1-2 CVE's/year
  • Plone Plone step 1: Install wget --no-check-certificate https://launchpad. net/plone/4.3/4.3.1/+download/Plone-4.3.1- UnifiedInstaller.tgz # Extract the downloaded file tar -xf Plone-4.3-UnifiedInstaller.tgz # Go the folder containing installer script cd Plone-4.3-UnifiedInstaller # Run script ./install.sh standalone cd ~/Plone/zinstance bin/instance fg
  • Plone: #2 Add content Plone Step 2: Add content
  • Plone Step 3: Add plugins $ nano buildout.cfg [instance] ... eggs = Products.PloneFormGen collective.recaptcha $ bin/buildout $ bin/instance fg
  • Plone Step 4: Theme it
  • Framework vs CMS start with a blank page start with fully featured site build up customise down good for "app" sites good for "content" sites others can edit Framework CMS startup tool agency tool risk reinventing the wheel risk hitting customisation cliff dev has full control shared control, editors, admin, dev, themer
  • Content Editor Site Admin Separation of concerns Backend devFrontend dev / Themer Integrator Reviewer
  • Developers blog Integrator Static site generator
  • An app/startup Backend devFrontend dev / Themer Django/Pyramid
  • Simple Blog Content Editor PluginsThemes Simple CMS e.g. Wordpress
  • Large content site PluginsThemes Frontend dev / Themer Content Editor Site Admin Integrator Reviewer Enterprise CMS
  • Web consultancy Plugins Frontend dev / Themer Content Editor Site Admin Integrator CMS/Framework
  • The customisation cliff Framework CMS
  • Goodie #8: Diazo - Ultimate in code - html seperation - templates without altering your html - allows designer to work on html while you work on the code - round trip
  • Diazo.org 1. app with very simple html - "content" 2. create mockups in html of how you want the pages to really look - "theme" 3. create a rules.xml. 4. Compile it to single XSLT file, 5. execute it in middleware
  • Goodie #9: RobotFramework what you get when you put python, selenum and BDD into a blender
  • RobotFramework
  • RobotFramework ● Not invented by Plone/Zope (Nokia did) ● but robotsuite was ● Used to test Plone ● Automated screenshots for user manuals
  • Thanks Dylan Jay (pretagov.com.au)