[Python-Dev] Can/should built-in functions get get? (original) (raw)
Christian Heimes lists at cheimes.de
Fri Sep 5 02:28:01 CEST 2008
- Previous message: [Python-Dev] Can/should built-in functions get __get__?
- Next message: [Python-Dev] Can/should built-in functions get __get__?
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]
Terry Reedy wrote:
One of the nice features of 3.0 is that differences between classes defined in C and Python (other than speed) are mostly erased or hidden from the view of a Python programmer.
However, there are still sometimes surprising and quite visible differences between 'functions' written in C and Python. Can these be better unified also? In particular, built-in functions, in spite of of being labeled 'builtinfunctionormethod', are not usable as methods because they lack the get method needed to bind function to instance.
Python is far too late in the release cycle to introduce a drastic change. The issues has been discussed about half a year ago and we decided against changing PyCFunction.
But it was a good thing that you've raises your concern. I totally forgot about the new instancemethod type. My code is still in classobject.c but it's not exposed to Python level. IIRC the Pyrex/Cython guys are in need of such a feature.
Patch:
--- Python/bltinmodule.c (revision 66222) +++ Python/bltinmodule.c (working copy) @@ -2301,6 +2301,7 @@ SETBUILTIN("frozenset", &PyFrozenSet_Type); SETBUILTIN("property", &PyProperty_Type); SETBUILTIN("int", &PyLong_Type);
SETBUILTIN("instancemethod", &PyInstanceMethod_Type); SETBUILTIN("list", &PyList_Type); SETBUILTIN("map", &PyMap_Type); SETBUILTIN("object", &PyBaseObject_Type);
Result:
$ ./python Python 3.0b3+ (py3k:66222M, Sep 5 2008, 02:24:22) [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2 Type "help", "copyright", "credits" or "license" for more information.
class Example: ... id = instancemethod(id) ... example = Example() example.id() == id(example) True
Christian
- Previous message: [Python-Dev] Can/should built-in functions get __get__?
- Next message: [Python-Dev] Can/should built-in functions get __get__?
- Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]