8000 BUG: fix for #4753 (out keyword with __numpy_ufunc__) by cowlicks · Pull Request #5566 · numpy/numpy · GitHub
[go: up one dir, main page]
Skip to content

BUG: fix for #4753 (out keyword with __numpy_ufunc__) #5566

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 2 commits into from
Closed

BUG: fix for #4753 (out keyword with __numpy_ufunc__) #5566

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
5fa0d00
Check `out` kwarg for __nump_ufunc__ override
cowlicks Jan 26, 2015
7ec0347
Tests for bug 4753
cowlicks Feb 10, 2015
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Next Next commit
Check out kwarg for __nump_ufunc__ override
  • Loading branch information
@cowlicks
cowlicks committed Feb 16, 2015
commit 5fa0d00bd41659db2e9fedd815f228e765894e9e
82 changes: 63 additions & 19 deletions numpy/core/src/private/ufunc_override.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,7 @@
#include <string.h>
#include "numpy/ufuncobject.h"

/* Normalize different ufunc methods */
static void
normalize___call___args(PyUFuncObject *ufunc, PyObject *args,
PyObject **normal_args, PyObject **normal_kwds,
Expand Down Expand Up @@ -152,6 +153,64 @@ normalize_at_args(PyUFuncObject *ufunc, PyObject *args,
return;
}

/*
* Check args for a object with a `__numpy_ufunc__` attribute.
*/
static int
check_tuple_for_numpy_ufunc(PyObject *args, int *noa,
int *i, PyObject *with_override[NPY_MAXARGS],
int with_override_pos[NPY_MAXARGS]) {
int og_i = *i; /* original i */
int og_noa = *noa; /* original number of overriding args */
int nargs = PyTuple_GET_SIZE(args);
PyObject *obj;

for (; *i < (og_i + nargs); ++*i) {
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Ewww. Instead of *i, use a local variable and assign its value on exit. Best rename the argument to something other than i also.

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Noted.


obj = PyTuple_GET_ITEM(args, *i);

/* short circuit optimization for common cases. */
if (PyArray_CheckExact(obj) || PyArray_IsScalar(obj, Generic) ||
_is_basic_python_type(obj)) {
continue;
}

if (PyObject_HasAttrString(obj, "__numpy_ufunc__")) {
with_override[*noa] = obj;
with_override_pos[*noa] = *i;
++*noa;
}
}
if ((noa - og_noa) > 0) {
return 1;
}
return 0;
}

static int
check_kwds_for_numpy_ufunc(PyObject *kwds, int *noa, int *i,
PyObject **with_override,
int with_override_pos[NPY_MAXARGS]) {
PyObject *obj;
if ((kwds)&& (PyDict_CheckExact(kwds))) {
obj = PyDict_GetItemString(kwds, "out");
if (obj != NULL) {
if (PyObject_HasAttrString(obj, "__numpy_ufunc__")) {
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

This may be a microoptimization, but similarly to what you do in check_tuple_for_numpy_ufunc, you could skip searching the object's dictionary for the string if it is None or a strict ndarray or scalar.

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Okay thanks @jaimefrio

with_override[*noa] = obj;
with_override_pos[*noa] = *i;
++*noa;
return 1;
}
if PyTuple_CheckExact(obj) {
return check_tuple_for_numpy_ufunc(obj, noa, i,
with_override,
with_override_pos);
}
}
}
return 0;
}

/*
* Check a set of args for the `__numpy_ufunc__` method. If more than one of
* the input arguments implements `__numpy_ufunc__`, they are tried in the
Expand All @@ -169,11 +228,10 @@ PyUFunc_CheckOverride(PyUFuncObject *ufunc, char *method,
PyObject **result,
int nin)
{
int i;
int override_pos; /* Position of override in args.*/
int i = 0;
int override_pos; /* Position of winning override in args.*/
int j;

int nargs = PyTuple_GET_SIZE(args);
int noa = 0; /* Number of overriding args.*/

PyObject *obj;
Expand Down Expand Up @@ -205,22 +263,8 @@ PyUFunc_CheckOverride(PyUFuncObject *ufunc, char *method,
goto fail;
}

for (i = 0; i < nargs; ++i) {
obj = PyTuple_GET_ITEM(args, i);
/*
* TODO: could use PyArray_GetAttrString_SuppressException if it
* weren't private to multiarray.so
*/
if (PyArray_CheckExact(obj) || PyArray_IsScalar(obj, Generic) ||
_is_basic_python_type(obj)) {
continue;
}
if (PyObject_HasAttrString(obj, "__numpy_ufunc__")) {
with_override[noa] = obj;
with_override_pos[noa] = i;
++noa;
}
}
check_tuple_for_numpy_ufunc(args, &noa, &i, with_override, with_override_pos);
Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

The return value doesn't seem to be used for anything, is that intentional? If so, why not use it for i?

Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Will do.

Copy link
Member

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Or you could just combine the functions. They aren't used anywhere else, correct?

check_kwds_for_numpy_ufunc(kwds, &noa, &i, with_override, with_override_pos);

/* No overrides, bail out.*/
if (noa == 0) {
Expand Down
0