A software example
The HTML example that was mentioned at the beginning of the chapter is actually used by django-widgy, a third-party tree editor for Django that can be used as a Content Management System (CMS). The django-widgy editor contains a page builder that can be used for creating HTML pages with different layouts [j.mp/widgypb].
The django-query-builder library is another third-party Django library that relies on the Builder pattern. The django-query-builder library can be used for building SQL queries dynamically. Using this, we can control all aspects of a query and create a different range of queries, from simple to very complex [j.mp/djangowidgy].
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