PEP 8 states that developers should never invent their own dunder methods: __double_leading_and_trailing_underscore__ : "magic" objects or attributes that live in user-controlled namespaces. E.g. __init__ , __import__ or __file__ . Never invent such names; only use them as documented.
https://www.python.org/dev/peps/pep-0008/#naming-conventions In other words, dunder methods are reserved for use by the core developers for the use of the Python interpreter. Apart from PEP 8, is this documented anywhere in the official documentation? If so, I have been unable to find it. -- Steven -- https://mail.python.org/mailman/listinfo/python-list