Mateusz Loskot <mate...@loskot.net> added the comment: Is this report about documenting of the concept of immutable types in Python in general or regarding existing built-in types, like datetime.datetime?
Generally, the concept of immutable type with relation to tp_new is mentioned (sneaked) here: 1) http://docs.python.org/release/3.2.2/c-api/typeobj.html "A good rule of thumb is that for immutable types, all initialization should take place in tp_new, while for mutable types, most initialization should be deferred to tp_init." 2) http://www.python.org/dev/peps/pep-0253/ Note that for immutable object types, the initialization cannot be done by the tp_init() slot: this would provide the Python user with a way to change the initialization. Therefore, immutable objects typically have an empty tp_init() implementation and do all their initialization in their tp_new() slot. IMHO, it deserves a dedicated section/chapter in the docs. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue4442> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
