[docs] [issue37145] collections.abc.MappingView mixins rely on undocumented _mapping

Raymond Hettinger <raymond.hettinger@gmail.com> added the comment: The _mapping attribute is a private implementation detail and should remain undocumented. A user of mapping views creates that attribute via the __init__() method. In contrast, _from_iterable is explicitly meant to be overridden because it is the only way to control object creation. Thank you for the suggestion. ---------- resolution: -> not a bug stage: -> resolved status: open -> closed _______________________________________ Python tracker <report@bugs.python.org> <https://bugs.python.org/issue37145> _______________________________________