Generally, the Python community uses the term Pythonic to describe a piece of idiomatic code. It typically refers to the principles laid out in The Zen of Python. Written like a poem, it is extremely useful to describe such a vague concept.
Furthermore, Django developers have crisply documented their design philosophies while designing the framework at https://docs.djangoproject.com/en/dev/misc/design-philosophies/.
While the document describes the thought process behind how Django was designed, it is also useful for developers using Django to build applications. Certain principles such as Don't Repeat Yourself (DRY), loose coupling ...