8000 BUG difference in behaviour for subclass output in ufuncs by mhvk · Pull Request #4753 · numpy/numpy · GitHub
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BUG difference in behaviour for subclass output in ufuncs #4753

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Merged
merged 1 commit into from
Oct 5, 2015
Merged

BUG difference in behaviour for subclass output in ufuncs #4753

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Check out kwarg for __nump_ufunc__ override and set index appropria… 
…tely

for the case where self is among outputs but not among
10000
 inputs. Ensure it
works both out passed on as an argument and with out in a keyword argument.
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@cowlicks @mhvk
cowlicks authored and mhvk committed Jun 19, 2015
commit 288239d3485e753e0735fbed3a25dfaebe9b80a9
37 changes: 32 additions & 5 deletions numpy/core/src/private/ufunc_override.h
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Original file line number Diff line number Diff line change
Expand Up @@ -180,10 +180,13 @@ PyUFunc_CheckOverride(PyUFuncObject *ufunc, char *method,
int override_pos; /* Position of override in args.*/
int j;

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

PyObject *obj;
PyObject *out_kwd_obj = NULL;
PyObject *other_obj;

PyObject *method_name = NULL;
Expand All @@ -204,16 +207,40 @@ PyUFunc_CheckOverride(PyUFuncObject *ufunc, char *method,
"with non-tuple");
goto fail;
}

if (PyTuple_GET_SIZE(args) > NPY_MAXARGS) {
nargs = PyTuple_GET_SIZE(args);
if (nargs > NPY_MAXARGS) {
PyErr_SetString(PyExc_ValueError,
"Internal Numpy error: too many arguments in call "
"to PyUFunc_CheckOverride");
goto fail;
}

for (i = 0; i < nargs; ++i) {
obj = PyTuple_GET_ITEM(args, i);
/* be sure to include possible 'out' keyword argument. */
if ((kwds)&& (PyDict_CheckExact(kwds))) {
out_kwd_obj = PyDict_GetItemString(kwds, "out");
if (out_kwd_obj != NULL) {
out_kwd_is_tuple = PyTuple_CheckExact(out_kwd_obj);
if (out_kwd_is_tuple) {
nout_kwd = PyTuple_GET_SIZE(out_kwd_obj);
}
else {
nout_kwd = 1;
}
}
}

for (i = 0; i < nargs + nout_kwd; ++i) {
if (i < nargs) {
obj = PyTuple_GET_ITEM(args, i);
}
else {
if (out_kwd_is_tuple) {
obj = PyTuple_GET_ITEM(out_kwd_obj, i-nargs);
}
else {
obj = out_kwd_obj;
}
}
/*
* TODO: could use PyArray_GetAttrString_SuppressException if it
* weren't private to multiarray.so
Expand Down
72 changes: 65 additions & 7 deletions numpy/core/tests/test_multiarray.py
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Expand Up @@ -2383,15 +2383,15 @@ def __numpy_ufunc__(self, ufunc, method, i, inputs, **kw):
return "ufunc"
else:
inputs = list(inputs)
inputs[i] = np.asarray(self)
if i < len(inputs):
inputs[i] = np.asarray(self)
func = getattr(ufunc, method)
if ('out' in kw) and (kw['out'] is not None):
kw['out'] = np.asarray(kw['out'])
r = func(*inputs, **kw)
if 'out' in kw:
return r
else:
x = self.__class__(r.shape, dtype=r.dtype)
x[...] = r
return x
x = self.__class__(r.shape, dtype=r.dtype)
x[...] = r
return x

class SomeClass3(SomeClass2):
def __rsub__(self, other):
Expand Down Expand Up @@ -2475,6 +2475,64 @@ def __numpy_ufunc__(self, ufunc, method, i, inputs, **kw):
assert_('sig' not in kw and 'signature' in kw)
assert_equal(kw['signature'], 'ii->i')

def test_numpy_ufunc_index(self):
# Check that index is set appropriately, also if only an output
# is passed on (latter is another regression tests for github bug 4753)
class CheckIndex(object):
def __numpy_ufunc__(self, ufunc, method, i, inputs, **kw):
return i

a = CheckIndex()
dummy = np.arange(2.)
# 1 input, 1 output
assert_equal(np.sin(a), 0)
assert_equal(np.sin(dummy, a), 1)
assert_equal(np.sin(dummy, out=a), 1)
assert_equal(np.sin(dummy, out=(a,)), 1)
assert_equal(np.sin(a, a), 0)
assert_equal(np.sin(a, out=a), 0)
assert_equal(np.sin(a, out=(a,)), 0)
# 1 input, 2 outputs
assert_equal(np.modf(dummy, a), 1)
assert_equal(np.modf(dummy, None, a), 2)
assert_equal(np.modf(dummy, dummy, a), 2)
assert_equal(np.modf(dummy, out=a), 1)
assert_equal(np.modf(dummy, out=(a,)), 1)
assert_equal(np.modf(dummy, out=(a, None)), 1)
assert_equal(np.modf(dummy, out=(a, dummy)), 1)
assert_equal(np.modf(dummy, out=(None, a)), 2)
assert_equal(np.modf(dummy, out=(dummy, a)), 2)
assert_equal(np.modf(a, out=(dummy, a)), 0)
# 2 inputs, 1 output
assert_equal(np.add(a, dummy), 0)
assert_equal(np.add(dummy, a), 1)
assert_equal(np.add(dummy, dummy, a), 2)
assert_equal(np.add(dummy, a, a), 1)
assert_equal(np.add(dummy, dummy, out=a), 2)
assert_equal(np.add(dummy, dummy, out=(a,)), 2)
assert_equal(np.add(a, dummy, out=a), 0)

def test_out_override(self):
# regression test for github bug 4753
class OutClass(ndarray):
def __numpy_ufunc__(self, ufunc, method, i, inputs, **kw):
if 'out' in kw:
tmp_kw = kw.copy()
tmp_kw.pop('out')
func = getattr(ufunc, method)
kw['out'][...] = func(*inputs, **tmp_kw)

A = np.array([0]).view(OutClass)
B = np.array([5])
C = np.array([6])
np.multiply(C, B, A)
assert_equal(A[0], 30)
assert_(isinstance(A, OutClass))
A[0] = 0
np.multiply(C, B, out=A)
assert_equal(A[0], 30)
assert_(isinstance(A, OutClass))


class TestCAPI(TestCase):
def test_IsPythonScalar(self):
Expand Down
0