[Cython] MemoryViews require writeable arrays?

[Sturla Molden]

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 readonly, and then you shouldn't write to it! 
When you set the readonly flag, Cython cannot retrieve the buffer with 
PyBUF_WRITEABLE. Thus, Cython helps you not to shoot yourself in the 
foot. I don't think you can declare a read-only memoryview in Cython. 
(Well, not by any means I know of.)


Sturla