django-mathfilters is a pip-installable module that provides different simple math filters for Django.
Django provides an add template filter, but no corresponding subtracting, multiplying or dividing filters.
Django ticket #361 has been closed as wontfix, so I had to create an alternative that is easy to install in a new Django project.
It currently supports int, float, Decimal and cDecimal types, or any other type that can be converted to int or float.
Note that when you have the cdecimal package installed, I assume all Decimal values that are passed to the tag are of cdecimal type. If they aren't, weird things may happen.
$ pip install django-mathfiltersThen add mathfilters to your INSTALLED_APPS.
You need to load mathfilters at the top of your template. The script provides the following filters:
sub– subtractionmul– multiplicationdiv– divisionabs– absolute valuemod– modulo
Example:
html
{% load mathfilters %}
...
<h1>Basic math filters</h1>
- <ul>
<li>8 + 3 = {{ 8|add:3 }}</li>
<li>13 - 17 = {{ 13|sub:17 }}</li>
{% with answer=42 %} <li>42 * 0.5 = {{ answer|mul:0.5 }}</li> {% endwith %}
{% with numerator=12 denominator=3 %} <li>12 / 3 = {{ numerator|div:denominator }}</li> {% endwith %}
<li> = {{ -13|abs }}</li>
</ul>
v0.2.1 (2013-10-09)
- [add] Use
cdecimalinstead ofdecimalif available - [add] When combining
floatandDecimalvalues, automatically convert float to Decimal
v0.2.0 (2013-07-23)
- [add] New
modfilter
v0.1.3 (2012-12-04)
- [add] Support for
Decimaltype
v0.1.2 (2012-10-09)
- [add] Initial version
MIT License, see LICENSE file.