zaki-yama/custom_template_tags.templatetags.current_time.py

## custom_template_tags.templatetags.current_time.py
# -*- coding: utf-8 -*-
import datetime

from django import template


register = template.Library()
# これかデコレータ(@register.tag)によってタグを登録する
# register.tag('current_time', do_current_time)


# name を省略すると関数名をそのままタグ名として使用する
@register.tag(name='current_time')
def do_current_time(parser, token):
	try:
		# split_contents() knows not to split quoted strings.
		tag_name, format_string = token.split_contents()
	except ValueError:
		raise template.TemplateSyntaxError("%r tag requires a single argument" % token.contents.split()[0])
	if not (format_string[0] == format_string[-1] and format_string[0] in ('"', "'")):
		raise template.TemplateSyntaxError("%r tag's argument should be in quotes" % tag_name)
	return CurrentTimeNode(format_string[1:-1])


class CurrentTimeNode(template.Node):
	def __init__(self, format_string):
		self.format_string = format_string
	def render(self, context):
		return datetime.datetime.now().strftime(self.format_string)

## custom_template_tags.urls.py
from django.conf.urls import patterns, include, url
from django.views.generic import TemplateView

urlpatterns = patterns('',
    (r'^', TemplateView.as_view(template_name='custom_template_tags/main_page.html')),
)

## templates.custom_template_tags.main_page.html
{% load current_time %}
<html>
<head>
</head>
<body>
	<p>The time is {% current_time '%Y-%m-%d %I:%M %p' %}.</p>
</body>
</html>
	# -- coding: utf-8 --
	import datetime

	from django import template


	register = template.Library()
	# これかデコレータ(@register.tag)によってタグを登録する
	# register.tag('current_time', do_current_time)


	# name を省略すると関数名をそのままタグ名として使用する
	@register.tag(name='current_time')
	def do_current_time(parser, token):
	try:
	# split_contents() knows not to split quoted strings.
	tag_name, format_string = token.split_contents()
	except ValueError:
	raise template.TemplateSyntaxError("%r tag requires a single argument" % token.contents.split()[0])
	if not (format_string[0] == format_string[-1] and format_string[0] in ('"', "'")):
	raise template.TemplateSyntaxError("%r tag's argument should be in quotes" % tag_name)
	return CurrentTimeNode(format_string[1:-1])


	class CurrentTimeNode(template.Node):
	def __init__(self, format_string):
	self.format_string = format_string
	def render(self, context):
	return datetime.datetime.now().strftime(self.format_string)
	from django.conf.urls import patterns, include, url
	from django.views.generic import TemplateView

	urlpatterns = patterns('',
	(r'^', TemplateView.as_view(template_name='custom_template_tags/main_page.html')),
	)
	{% load current_time %}
	<html>
	<head>
	</head>
	<body>
	<p>The time is {% current_time '%Y-%m-%d %I:%M %p' %}.</p>
	</body>
	</html>