Explain the use of Django's template filters and custom template tags.
Instruction: Describe how to create and use custom template filters and tags in Django.
Context: This question tests the candidate's ability to extend Django's templating engine for custom data presentation logic.
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A filter transforms a value in an expression such as {{ name|initials }}. A tag uses {% ... %} syntax and can accept several arguments or render a reusable fragment.
For an installed Django app named catalog, create an empty catalog/templatetags/__init__.py and this file:...