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All snippets written in Python

2958 snippets

Snippet List

Truncate Characters Filter (simple)

Super stripped down filter to truncate after a certain number of letters. Ex: {{ long_blurb|truncchar:20 }} will display 20 characters of the long blurb followed by "..."

  • filter
  • letters
  • characters
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Simple views dispatcher by http methods

Calls a view by request.method value. To use this dispatcher write your urls.py like this: urlpatterns = pattern('', url(r'^foo/$', dispatch(head=callable1, get=callable2, delete=callable3)), ) If `request.method` is equal to head, `callable1` will be called as your usual view function; if it is `get`, `callable2` will be called; et cetera. If the method specified in request.method is not one handled by `dispatch(..)`, `HttpResponseNotAllowed` is returned.

  • urls
  • rest
  • http
  • url
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Simple Mobile Support

For those interested in making a mobile site geared toward the higher end devices, and wanting a little leverage over device-specific quirks. These are the big players in the U.S. market, but of course, add your own User-Agents to match your audience's popular browsers. Usage: <html class="{{ device.classes }}"> You can also leverage template logic: {% if device.iphone %} <p>You are browsing on {% if device.iphone = "iphone4" %} iPhone 4 {% else %} an iPhone pre-version 4{% endif %} </p> {% endif %}

  • mobile
  • context_processors
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Regular Expression Replace Template Filter

This will perform a regular expression search/replace on a string in your template. `{% load replace %}` `{{ mystring|replace:"/l(u+)pin/m\1gen" }}` If: `mystring = 'lupin, luuuuuupin, and luuuuuuuuuuuuupin are lè pwn'` then it will return: `mugen, muuuuuugen, and muuuuuuuuuuuuugen are lè pwn` The argument is in the following format: [delim char]regexp search[delim char]regexp replace

  • regex
  • regular-expressions
  • templates
  • filters
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Generic CSV export admin action factory with labels

Based on [#2020](http://djangosnippets.org/snippets/2020/) This snippet creates a simple generic export to csv action that you can specify the fields you want exported and the labels used in the header row for each field. It expands on #2020 by using list comprehensions instead of sets so that you also control the order of the fields as well.

  • export
  • csv
  • label
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Django cycle tag that doesn't continue where it left off

This tag is equivalent to {% cycle %} but resets when we exit the containing loop. See Django ticket "Cycle tag should reset after it steps out of scope" [https://code.djangoproject.com/ticket/5908](https://code.djangoproject.com/ticket/5908) This code is a lightly modified version of Simon Litchfield's attachment on that ticket.

  • forloop
  • cycle
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Updated: GeoJSON Serializer for GeoDjango (gis)

Unfortunately the built in Django JSON serialzer encodes GeoDjango GeometyrField as WKT text. This snippet extends django's serializer and adds support for GEOJson format. Built in JSON serializer output: [{"pk": 1, ... "geopoint": "POINT (-76.5060419999999937 44.2337040000000030)" ... }] GeoJSON serializer ouput: [{"pk": 1, ... "geopoint": {"type": "Point", "coordinates": [-76.503296000000006, 44.230956999999997], "__GEOSGeometry__": [ "__init__", [ "SRID=4326;POINT (-75.5129950000000036 44.2442360000000008)" ] ] }] Note: the "__GEOSGeometry__" is a class hint as defined by JSON-RCP and used during deserilization.

  • GeoJson
  • Serializer
  • Deserializer
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PostGIS "nearest" including range limiting

this is an enhancement to paulsmith's code snippet 190, to provide an extra "search by distance" parameter rather than "limit number of results returned". i need this for a social networking site where users can search for people within a certain geographical area.

  • postgis
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Easier prefix handling for forms

**autoprefixed** is a decorator for Form classes that simplifies prefix handling by storing it in a hidden field. Thus when the form is posted, the prefix can be extracted from the posted data instead of having to pass it explicitly when instantiating the form.

  • form
  • prefix
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Easier and Faster than flatpages. Rendering templates by simpling calling by his path on the URL

This is in my opinion a better way to have flat pages in a project. In the example with the url patterns settings: / will render -> /pages/welcome.html /contact will render -> /pages/contact.html /products/ will render -> /pages/products/index.html /products/pricing will render -> /pages/products/pricing.html

  • views
  • flatpages
  • class-based-views
  • 1.4
  • class-based-views_1
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Model field choices as a namedtuple

This is a very flexible and concise way to [Handle choices the right way](http://www.b-list.org/weblog/2007/nov/02/handle-choices-right-way/) in model fields. * Preserves order. * Allows both a human-readable value for display in form `<select>`s as well as a code-friendly short name. * Mimic's Django's canonical [choices format](http://docs.djangoproject.com/en/1.3/ref/models/fields/#choices). * Doesn't restrict the value type. * Memory efficient. Inspired by [snippet 2373](http://djangosnippets.org/snippets/2373/) to use namedtuples as model field choices.

  • choice
  • choices
  • field
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