[Cython] MemoryViews require writeable arrays?

[Sturla Molden]

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, the request to acquire the PEP3118 
buffer will fail.

If you remove the PyBUF_WRITEABLE flag from lines 33 to 36, you can 
acquire a readonly buffer with typed memoryviews. But this is not 
recommended. In this case you would have to check for the readonly flag 
yourself and make sure you don't write to readonly buffer.


Sturla