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Re: Buffer writers and seek method, NativeFile.is_seekable proposal

hi Pearu,

Sounds good to me. I'd always intended to add support for random
access writes but have not done it yet.

On Fri, Sep 7, 2018 at 3:51 AM Pearu Peterson
<pearu.peterson@xxxxxxxxxxxxx> wrote:
> Hi,
> In Arrow C++, various buffer writers define Seek method while in
> pyarrow the seek is defined only for buffer readers (for instance,
> references only rd_file).
> So, pyarrow relates 'seekable' strictly to 'readable' file property while
> 'seekable' would make sense also when a file is 'writeable'. Non-seekable
> files would be sockets or pipes but memory buffers like CudaBuffer can be
> seekable.
> Is there any reason for relating 'seekable' to 'readable-only' within
> pyarrow?
> I propose introducing is_seekable attribute to NativeFile in order to untie
> 'seekable' property from 'readable' and 'writable' properties. What do you
> think?
> Best regards,
> Pearu