On 28.02.2013 15:55, Dave Hirschfeld wrote:
So the issue is that at present memoryviews can't be readonly?
https://github.com/cython/cython/blob/master/Cython/Compiler/MemoryView.py#L33
Typed memoryviews are thus acquired with the PyBUF_WRITEABLE flag. If
the the assigned buffer is readonly,
Sturla Molden writes:
>
> On 27.02.2013 20:05, Dave Hirschfeld wrote:
>
> > Is this a required restriction? Is there any workaround?
>
> http://www.python.org/dev/peps/pep-3118/
>
> What you should consider is the "readonly" field in "struct bufferinfo"
> or the access flag "PyBUF_WRITEABLE"
On 27.02.2013 20:05, Dave Hirschfeld wrote:
Is this a required restriction? Is there any workaround?
http://www.python.org/dev/peps/pep-3118/
What you should consider is the "readonly" field in "struct bufferinfo"
or the access flag "PyBUF_WRITEABLE".
In short:
A PEP3118 buffer can be r
Dave Hirschfeld writes:
>
> cpdef double[:] return_one(double[:] x):
> return np.array([1.0])
>
> In [43]: x = randn(3)
> ...: return_one(x)
> Out[43]:
>
> In [44]: x.flags['WRITEABLE'] = False
> ...: return_one(x)
> ValueError: buffer source array is read-only
>
>
> Any help, e
%%cython
cimport cython
import numpy as np
cimport numpy as np
@cython.boundscheck(False)
@cython.wraparound(False)
@cython.cdivision(True)
cpdef double[:] return_one(double[:] x):
return np.array([1.0])
In [43]: x = randn(3)
...: return_one(x)
Out[43]:
In [44]: x.flags['WRITEABLE'] =
