New submission from Andrew Wilkins <axw...@gmail.com>:
I've written an extension using Py_LIMITED_API, and I've created a type using
PyType_FromSpec with the slot "Py_sq_length" defined. The slot is not being
picked up, i.e. len(MyType()) fails. I can see that tp_as_sequence has not been
set, which explains why. All is well if I set it manually (without
Py_LIMITED_API defined), like so:
MyType->tp_as_sequence = &((PyHeapTypeObject*)MyType)->as_sequence;
As far as I can see (docs are lacking), there's no way of setting tp_as_number,
tp_as_sequence or tp_as_mapping in types created with PyType_FromSpec. I would
expect the presence of any Py_sq_* slots to set tp_as_sequence (likewise for
number and mapping).
----------
components: Interpreter Core
messages: 145013
nosy: awilkins
priority: normal
severity: normal
status: open
title: tp_as_{number,sequence,mapping} can't be set using PyType_FromSpec
versions: Python 3.2
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue13115>
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