[cctbxbb] boost python conversions help needed

[Winter, Graeme (DLSLtd,RAL,LSCI)]

<bump>

Does anyone know about this stuff or am I on my own here?

Alternative of using numpy arrays to do the job has been suggested but would prefer keeping in the cctbx ecosystem

Thanks Graeme

On 28 Sep 2020, at 07:15, Winter, Graeme (DLSLtd,RAL,LSCI) <graeme.winter at diamond.ac.uk<mailto:graeme.winter at diamond.ac.uk>> wrote:

Hi All,

In the branch

https://github.com/cctbx/cctbx_project/tree/fixed-width-int-types

I am working to add a full range of fixed-width integer types to allow explicit reading of binary data without conversion from images (amongst other things) - mostly I’ve got something _working_ but tests fail because stdout / err contains

  Standard error:
    /Users/graeme/svn/cctbx/conda_base/python.app/Contents/lib/python3.6/importlib/_bootstrap.py:219: RuntimeWarning: to-Python converter for scitbx::af::shared<unsigned int> already registered; second conversion method ignored.

has anyone got any hints where these may be registered?

The details of the low level flex implementation seems to be minimally documented, and the error has no useful stack trace, so I am at a bit of a loss as to where the other unsigned int conversion is registered.

Some pointers from someone who has delved into these in the past would be welcome - I have spent a couple days trying to find what I am doing wrong and have so far failed - hopefully someone on the list knows their way around in here

Cheers Graeme


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