Format numbers in django templates

I'm trying to format numbers. Examples:

1     => 1
12    => 12
123   => 123
1234  => 1,234
12345 => 12,345

It strikes as a fairly common thing to do but I can't figure out which filter I'm supposed to use.

Edit: If you've a generic Python way to do this, I'm happy adding a formatted field in my model.

From stackoverflow

• Well I couldn't find a Django way, but I did find a python way from inside my model:

  def format_price(self):
      import locale
      locale.setlocale(locale.LC_ALL, '')
      return locale.format('%d', self.price, True)
  

• As far as I can tell it is not currently possible: Django Users: locale aware number formats

• If you don't want to get involved with locales here is a function that formats numbers:

  def int_format(value, decimal_points=3, seperator=u'.'):
      value = str(value)
      if len(value) <= decimal_points:
          return value
      # say here we have value = '12345' and the default params above
      parts = []
      while value:
          parts.append(value[-decimal_points:])
          value = value[:-decimal_points]
      # now we should have parts = ['345', '12']
      parts.reverse()
      # and the return value should be u'12.345'
      return seperator.join(parts)
  

  Creating a custom template filter from this function is trivial.

• Django's contributed humanize application does this:

  {% load humanize %}
  {{ my_num|intcomma }}
  

• Be aware that changing locale is process-wide and not thread safe (iow., can have side effects or can affect other code executed within the same process).

  My proposition: check out the Babel package. Some means of integrating with Django templates are available.

• Regarding Ned Batchelder's solution, here it is with 2 decimal points and a dollar sign.

  from django.contrib.humanize.templatetags.humanize import intcomma
  
  def currency(dollars):
      dollars = float(dollars)
      return "$%s%s" % (intcomma(int(dollars)), ("%0.2f" % dollars)[-3:])
  

  Then you can

  {{my_dollars | currency}}