8000 ENH: random: Add the method `permuted` to Generator. by WarrenWeckesser · Pull Request #15121 · numpy/numpy · GitHub
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ENH: random: Add the method permuted to Generator. #15121

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Merged
merged 14 commits into from
Sep 2, 2020
Merged

ENH: random: Add the method permuted to Generator. #15121

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a84cdf0
ENH: random: Make _shuffle_raw and _shuffle_int standalone functions.
WarrenWeckesser Dec 15, 2019
081298c
ENH: random: Add the method `permuted` to Generator.
WarrenWeckesser Dec 15, 2019
7fc1136
Use PyMem_Malloc/_Free instead of malloc/free
WarrenWeckesser Aug 13, 2020
bc49d4b
Raise TypeError instead ValueError when out is not an ndarray.
WarrenWeckesser Aug 13, 2020
3dbcbae
Use order='K' when copying x to out.
WarrenWeckesser Aug 13, 2020
50c7611
Require out.shape be the same as x.shape
WarrenWeckesser Aug 13, 2020
023114f
Handle axis=None more efficiently.
WarrenWeckesser Aug 14, 2020
91d208a
DOC: Overhaul section on shuffling methods.
WarrenWeckesser Aug 20, 2020
95eff00
Use np.copyto instead of out[...] = x
WarrenWeckesser Aug 20, 2020
677f862
Don't release the GIL when shuffling an object array.
WarrenWeckesser Aug 20, 2020
f5d6f0b
DOC: Fix examples and move method summary to the top.
WarrenWeckesser Aug 20, 2020
f016d3a
Fix C prototype declaration to fix compiler warning.
WarrenWeckesser Aug 20, 2020
ebed0e8
Refine the C prototype to eliminate another compiler warning.
WarrenWeckesser Aug 20, 2020
785e239
Remove cimport of unused malloc and free.
WarrenWeckesser Aug 21, 2020
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Use PyMem_Malloc/_Free instead of malloc/free
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@WarrenWeckesser
WarrenWeckesser committed Aug 13, 2020
commit 7fc1136633704db883ee9070e1868a3442bcffde
5 changes: 3 additions & 2 deletions numpy/random/_generator.pyx
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Expand Up @@ -5,6 +5,7 @@ import warnings

from cpython.pycapsule cimport PyCapsule_IsValid, PyCapsule_GetPointer
from cpython cimport (Py_INCREF, PyFloat_AsDouble)
from cpython.mem cimport PyMem_Malloc, PyMem_Free

cimport cython
import numpy as np
Expand Down Expand Up @@ -4275,7 +4276,7 @@ cdef class Generator:

it = np.PyArray_IterAllButAxis(out, &ax)

buf = malloc(itemsize)
buf = PyMem_Malloc(itemsize)
if buf == NULL:
raise MemoryError('memory allocation failed in permuted')

Expand All @@ -4285,7 +4286,7 @@ cdef class Generator:
<char *>np.PyArray_ITER_DATA(it), <char *>buf)
np.PyArray_ITER_NEXT(it)

free(buf)
PyMem_Free(buf)
return out

def shuffle(self, object x, axis=0):
Expand Down
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