__doc__ string for getset members
Arnaud Delobelle
arnodel at gmail.com
Sun Apr 7 16:21:03 EDT 2013
On 7 April 2013 19:02, Nick Gnedin <ngnedin at gmail.com> wrote:
>
> Folks,
>
> I am writing an extension where I follow the guide on the web
> (http://docs.python.org/3.3/extending/newtypes.html#generic-attribute-management).
> I have an object declared,
>
> struct Object
> {
> PyObject_HEAD
> };
>
> and a member set through tp_getset mechanism,
>
> PyGetSetDef ObjectGetSet[] =
> {
> {"mem", (getter)MemGet, (setter)MemSet, "mem-doc-string", NULL},
> {NULL} /* Sentinel */
> };
>
> My question is - how do I access the doc string "mem-doc-string" supplied in
> the PyGetSetDef structure? If I type
>
> print(obj.mem.__doc__)
>
> then the __doc__ string for the result of a call to MemGet(...) is printed,
> not the doc string supplied in the PyGetSetDef structure.
>
That's not how Python works. You won't be able to get the docstring
of a descriptor this way. You need to do it from the class. The
behaviour you observe is normal and cannot be overriden.
--
Arnaud
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