Index: docs/structure/filter.md |
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+# Custom filters # |
+ |
+The `filters` directory can define custom Jinja2 filters which will be available |
+in all Jinja2 templates. The file name defines the filter name, e.g. |
+`filters/myfilter.py` will define a filter named `myfilter`. This file should |
+also contain a function called `myfilter`, this one will be called when the |
+filter is invoked. For more information on Jinja2 filters see |
+[official documentation](http://jinja.pocoo.org/docs/dev/api/#writing-filters). |