template

 template object & context object:

ex:

from django.template import Template, Context

a=Template("<p>hello {{name}} </p>")

b=Context({ 'name': 'Peter' } )

a.render(b)

{{ }} in template define the variable

context is a dictionary that map variable to value

render function replace the value with value

call method in {{ }}:

no () & no arguments

ex:

{{ dog.bark }}

list in {{}}:

ex:

{{items.2}}

dictionary in {{}}:

ex:

{{ Person.name }}

define a method that can not be executed by template

ex:

def  test(self):

       hello

test.alters_data=true

template tag:

if & else:

ex:

{% if isHot %}

     {{isHot}}

{% else %}

     not Hot

{% endif %}

and ,  or, not,  can be used in if 

for:

ex:

{% for  name in nameList %}

       {{ name}}

{% endfor %}

for & reverse:

ex:

{% for name in nameList reversed %}

     {{name}}

{% endfor %}

forloop.counter:

the number of times the loop has been entered

forloop.first:

forloop.revcounter:

forloop.last:

forloop.parentloop:

reference to the forloop object for the parent loop

ifequal / ifnotequal:

ex:

{%  ifequal a b %}

     test

{%  endifequal %}

comment:

ex:

{#  this is a comment #}

filter:

change variable,  use | with filter name

ex:

date filter:

{{ tempDate | date: "F j, Y" }}