deeply love python

class method & static method

class method:

ex:

def test(cls):

print('class method')

test=classmethod(test)

static method:

ex:

def test()

print('static method')

test=staticmethod(test)

url mapping

settings.py has a variable ROOT_URLCONF

ROOT_URLCONF decides the python file for routing

ROOT_URLCONF is urls.py by default

when a request comes in, Django loads ROOT_URLCONF and find the match between request url & urlpatterns

when pattern found, the associated view function is called( the function is passed HttpRequest object as first parameter)

the view function will return an HttpResponse object

define urlpatterns

ex:

urlpatterns = patterns( '', ( r'^test/$', testFunction) )

match /test/ , if request is /test/, testFunction is called

define view function:

ex:

def test(request):

now=datetime.datetime.now()

html= "<html><body>It is now %s.</body></html>" % now

return HttpResponse(html)

raw string

using r:

turn off escpate

ex:

tempStr= r'C:\test'

python path

print python path:

import sys

print sys.path

create a project, create an app, run the server, path, timezone

create a projct

django-admin.py startproject newSite

create an app in the project:

python manage.py startapp books

create __init__.py, models.py, views.py in books directory

run the server:

python manage.py runserver

running at 127.0.0.0.1:8000

python manage.py runserver 0.0.0.0 8888

listen on any network interface, on port 8888

set path for django project

add django_site.pth under /Library/Python/2.5/site-packages

ex:

django_site.pth:

/Volumes/Data/django_project/

time zone

in settings.py

TIME_ZONE = 'Asia/Taipei'

install django

sudo python setup.py install

name & main

when the file is run as a top-level program, __name__ is set as __main__

when the file is imported, __name__ is set to the module's name

Hence, we can use __name__ to do unit test.

If __name__ == __main__, we execute unit test

if __name__ != __main__, unit test is not executed