New submission from Dave Malcolm:
I've been trying to get numpy working with Python 3.3, and to so I had to make
some changes to CPython - hence I'm posting this to the Python bug tracker.
numpy pokes at the insides of PyUnicodeObject in a few places and is thus
affected by the PEP 393 changes in Python 3.3
I'm attaching my latest work-in-progress patch for numpy, which mostly works
(it has 3 remaining errors).
AIUI, the "numpy.str_" type subclasses PyUnicodeObject but with its own custom
allocator, which takes a size (this is called in PyArray_Scalar when type_num
== NPY_UNICODE). unicode_new_subtype calls tp_alloc but passes in 0 for the
size, so we can't use that. So I had to reimplement parts of unicode creation
in-place within numpy's PyArray_Scalar, copying macros from out of cpython's
unicodeobject.c
The other wart is that, AIUI, numpy supports byte-swapping the values within an
array, and when this is done for a unicode array, it byte-swaps the 4-byte UCS4
values. At that point, it's unlikely that the resulting 4-byte values are
below 0x10ffff, leading to various failures from inside CPython's unicode
handling.
So I hacked those test from out of CPython :) I'm attaching the diff I've got
against cpython (clearly just a hack at this stage).
I may of course be misunderstanding the insides of numpy.
With these changes, the numpy test suite runs, with just these remaining errors:
======================================================================
ERROR: Ticket #16
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/david/coding/python3.3/local-install/lib/python3.3/site-packages/numpy/core/tests/test_regression.py",
line 41, in test_pickle_transposed
b = pickle.load(f)
EOFError
======================================================================
ERROR: test_power_zero (test_umath.TestPower)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/david/coding/python3.3/local-install/lib/python3.3/site-packages/numpy/core/tests/test_umath.py",
line 139, in test_power_zero
assert_complex_equal(np.power(zero, 0+1j), cnan)
RuntimeWarning: invalid value encountered in power
======================================================================
ERROR: Failure: ValueError (can't handle version 187 of numpy.ndarray pickle)
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/david/coding/python3.3/local-install/lib/python3.3/site-packages/nose-1.1.2-py3.3.egg/nose/failure.py",
line 37, in runTest
raise self.exc_class(self.exc_val).with_traceback(self.tb)
File
"/home/david/coding/python3.3/local-install/lib/python3.3/site-packages/nose-1.1.2-py3.3.egg/nose/loader.py",
line 232, in generate
for test in g():
File
"/home/david/coding/python3.3/local-install/lib/python3.3/site-packages/numpy/lib/tests/test_format.py",
line 429, in test_roundtrip
arr2 = roundtrip(arr)
File
"/home/david/coding/python3.3/local-install/lib/python3.3/site-packages/numpy/lib/tests/test_format.py",
line 420, in roundtrip
arr2 = format.read_array(f2)
File
"/home/david/coding/python3.3/local-install/lib/python3.3/site-packages/numpy/lib/format.py",
line 449, in read_array
array = pickle.load(fp)
ValueError: can't handle version 187 of numpy.ndarray pickle
----------------------------------------------------------------------
Ran 4776 tests in 68.189s
FAILED (KNOWNFAIL=6, SKIP=1, errors=3)
----------
components: Interpreter Core
files: get-numpy-working-with-python-3.3.patch
keywords: patch
messages: 167256
nosy: dmalcolm
priority: normal
severity: normal
status: open
title: Python 3.3 and numpy
versions: Python 3.3
Added file:
http://bugs.python.org/file26668/get-numpy-working-with-python-3.3.patch
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Python tracker <[email protected]>
<http://bugs.python.org/issue15540>
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