Python exception after running PredictFractionalPeaks

[Nick Draper]

Fix the bug, and reinstate the alg usage test (currently a code block).

This script runs the algs but errors after:

    ws=LoadIsawPeaks("TOPAZ_3007.peaks")
    LoadIsawUB(ws,"ls5637.mat")
    IndexPeaks(ws)

    PredictFractionalPeaks(ws,FracPeaks='wsPeaksOut',HOffset=[-0.5,0,0.5],KOffset=0,LOffset=[-0.5,0.5])

This script fails to run:

    ws=LoadIsawPeaks("TOPAZ_3007.peaks")
    LoadIsawUB(ws,"ls5637.mat")
    IndexPeaks(ws)

    wsPeaksOut = PredictFractionalPeaks(ws,HOffset=[-0.5,0,0.5],KOffset=0,LOffset=[-0.5,0.5])

[Martyn Gigg]

Add an IPeaksWorkspaceProperty to Python

and put back the usage example for PredictFractionalPeaks that was failing. It failed because Python didn't understand the type of output it was trying to give back. Refs #9642

Changeset: ede3830b1da0123a21b9d8a6bf2c9ff91e3164d6

[Martyn Gigg]

Add required boost:: qualifier for dynamic cast

Refs #9642

Changeset: dc1fe5215b6e9f0715411dac90ea245b00949fff

[Martyn Gigg]

Branch: ​bugfix/9642_py_except_predict_fractional

Tester: Check that the documentation has been updated to include the usage test as a doctest and verify that running the snippet of code now produces a new peaks workspace

[Karl Palmen]

The code snippets run without any error messages, but PredictFractionalPeaks does not produce an output workspace with data.

The usage example runs in the build without error. It also runs in Mantidplot as shown in usage example and produces an output workspace with data.

[Karl Palmen]

Merge remote-tracking branch 'origin/bugfix/9642_py_except_predict_fractional'

Full changeset: ​857bf7f1ca73ee9bb4f47391ee5ebaf9788480f4

[Stuart Campbell]

This ticket has been transferred to github issue ​10485