Hi all,
I'm having a error using memmap objects shared among processes created
by the multprocessing module. This error only happen in Windows with
numpy 1.5 or above, in numpy 1.4.1 it doesn't happen, In Linux and Mac
OS X it doesn't happen. This error is demonstrated by this little
example script here https://gist.github.com/929168 , and the traceback
is bellow (between <traceback> tags):
<traceback>
Process Process-1:
Traceback (most recent call last):
File "C:\Python26\Lib\multiprocessing\process.py", line 232, in
_bootstrap
self.run()
File "C:\Python26\Lib\multiprocessing\process.py", line 88, in run
self._target(*self._args, **self._kwargs)
File "C:\Documents and Settings\phamorim\Desktop\test.py", line 7, in
print_ma
trix
print matrix
File "C:\Python26\Lib\site-packages\numpy\core\numeric.py", line
1379, in arra
y_str
return array2string(a, max_line_width, precision, suppress_small, '
', "", s
tr)
File "C:\Python26\Lib\site-packages\numpy\core\arrayprint.py", line
309, in ar
ray2string
separator, prefix)
File "C:\Python26\Lib\site-packages\numpy\core\arrayprint.py", line
189, in _a
rray2string
data = _leading_trailing(a)
File "C:\Python26\Lib\site-packages\numpy\core\arrayprint.py", line
162, in _l
eading_trailing
min(len(a), _summaryEdgeItems))]
File "C:\Python26\Lib\site-packages\numpy\core\memmap.py", line 257,
in __arra
y_finalize__
self.filename = obj.filename
AttributeError: 'memmap' object has no attribute 'filename'
Exception AttributeError: AttributeError("'NoneType' object has no
attribute 'te
ll'",) in <bound method memmap.__del__ of memmap([0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0], dtype=int16)> ignored
</traceback>
I don't know if it's a bug, but I thought it's is import to report
because the version 1.4.1 was working and 1.5.0 and above was not.
Thanks!
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