Question

10.4. Pyramid

10.4.1. Getting Started

$ sudo apt-get install python-setuptools

$ sudo easy_install -U pyramid

10.4.1.1. virtualenv - create virtual Python instances

sudo apt-get install python-virtualenv

virtualenv --no-site-packages myenv

cd myenv

$ sudo easy_install -U pyramid

10.4.1.2. Hello world

$ vim test/helloworld.py
from pyramid.config import Configurator
from pyramid.response import Response
from paste.httpserver import serve

def hello_world(request):
    return Response('Hello world!')

def goodbye_world(request):
    return Response('Goodbye world!')

if __name__ == '__main__':
    config = Configurator()
    config.add_view(hello_world)
    config.add_view(goodbye_world, name='goodbye')
    app = config.make_wsgi_app()
    serve(app, host='0.0.0.0')

$ python test/helloworld.py
serving on 0.0.0.0:8080 view at http://127.0.0.1:8080

$ curl http://127.0.0.1:8080/
Hello world!

$ curl http://127.0.0.1:8080/goodbye
Goodbye world!

10.4.1.3. MongoDB

$ sudo apt-get install python-pymongo python-gridfs

vim development.ini
[app:test]
# mongodb settings ...
db_uri = mongodb://localhost/
db_name = test

测试

from pyramid.config import Configurator
from pyramid.events import subscriber
from pyramid.events import NewRequest

from gridfs import GridFS
import pymongo

def main(global_config, **settings):
    config = Configurator(settings=settings)

    db_uri = settings['db_uri']
    conn = pymongo.Connection(db_uri)
    config.registry.settings['db_conn'] = conn
    config.add_subscriber(add_mongo_db, NewRequest)

    config.add_route('dashboard', '/')
    # other routes and more config...
    config.scan('myapp')

    return config.make_wsgi_app()

def add_mongo_db(event):
    settings = event.request.registry.settings
    db = settings['db_conn'][settings['db_name']]
    event.request.db = db
    event.request.fs = GridFS(db)

 @view_config(route_name='dashboard',
              renderer="myapp:templates/dashboard.pt")
 def dashboard(request):
     vendors = request.db['vendors'].find()
     return {'vendors':vendors}

10.4.2. Creating a Pyramid Project

$ paster create -t pyramid_starter test
$ cd test
$ sudo python setup.py develop
$ paster serve development.ini

10.4.2.1. mongodb

vim development.ini
[app:test]
# mongodb settings ...
mongodb_uri = mongodb://localhost/
mongodb_name = test

vim test/resources.py

from gridfs import GridFS
import pymongo

mongo_conn = pymongo.Connection()

def add_mongo(event):
    req = event.request
    req.db = mongo_conn['test']
    req.fs = GridFS(req.db)

class Root(object):
    def __init__(self, request):
        self.request = request

$ vim test/__init__.py

def main(...):
    ...
    config.add_subscriber('foo.resources.add_mongo',
                          'pyramid.events.NewRequest')
    ...

例 10.1. __init__.py

from pyramid.config import Configurator
from test.resources import Root

def main(global_config, **settings):
    """ This function returns a Pyramid WSGI application.
    """
    config = Configurator(root_factory=Root, settings=settings)
    config.add_subscriber('test.resources.add_mongo','pyramid.events.NewRequest')
    config.add_view('test.views.my_view',
                    context='test:resources.Root',
                    renderer='test:templates/mytemplate.pt')
    config.add_static_view('static', 'test:static')
    return config.make_wsgi_app()