New submission from Nick Coghlan:

The main C API docs don't clearly explain how to define new types, so people almost always cargo cult an existing legacy type definition instead (I know I do).

The extending and embedding docs have a guide (http://docs.python.org/3/extending/newtypes.html), but that describes the old legacy method based on static type declarations. New code should instead use the dynamic mechanism defined in PEP 384 (http://www.python.org/dev/peps/pep-0384/#type-objects).

See also http://docs.python.org/3/c-api/type.html#PyType_FromSpec

Note that PyType_Spec isn't defined in the C API docs at all.

assignee: docs@python components: Documentation messages: 207927 nosy: docs@python, ncoghlan priority: normal severity: normal stage: needs patch status: open title: C API docs need a clear "defining custom extension types" section type: enhancement versions: Python 3.3, Python 3.4, Python 3.5

Python tracker report@bugs.python.org http://bugs.python.org/issue20224