Format numbers in django templates

Question

I\'m trying to format numbers. Examples:

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

It strikes as a

Answer 1

Not sure why this has not been mentioned, yet:

{% load l10n %}

{{ value|localize }}

https://docs.djangoproject.com/en/1.11/topics/i18n/formatting/#std:templatefilter-localize

You can also use this in your Django code (outside templates) by calling localize(number).

Answer 2

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.

Answer 3

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)

Answer 4

Try adding the following line in settings.py:

USE_THOUSAND_SEPARATOR = True

This should work.

Refer to documentation.

---

update at 2018-04-16:

There is also a python way to do this thing:

>>> '{:,}'.format(1000000)
'1,000,000'

Answer 5

Regarding Ned Batchelder's solution, here it is with 2 decimal points and a dollar sign. This goes somewhere like my_app/templatetags/my_filters.py

from django import template
from django.contrib.humanize.templatetags.humanize import intcomma

register = template.Library()

def currency(dollars):
    dollars = round(float(dollars), 2)
    return "$%s%s" % (intcomma(int(dollars)), ("%0.2f" % dollars)[-3:])

register.filter('currency', currency)

Then you can

{% load my_filters %}
{{my_dollars | currency}}

Answer 6

The humanize app offers a nice and a quick way of formatting a number but if you need to use a separator different from the comma, it's simple to just reuse the code from the humanize app, replace the separator char, and create a custom filter. For example, use space as a separator:

@register.filter('intspace')
def intspace(value):
    """
    Converts an integer to a string containing spaces every three digits.
    For example, 3000 becomes '3 000' and 45000 becomes '45 000'.
    See django.contrib.humanize app
    """
    orig = force_unicode(value)
    new = re.sub("^(-?\d+)(\d{3})", '\g<1> \g<2>', orig)
    if orig == new:
        return new
    else:
        return intspace(new)