Create an algorithm that will run a snippet of python code

[Janik Zikovsky]

This is for use in LoadLiveData.

This would be an algorithm with 3 properties:

• InputWorkspace (optional)?
• Code
• OutputWorkspace (optional)?

The algorithm would:

• Have a method for validating the syntax of the code (validator?)
• Run the python code in its exec() method.
• Redirect stdout, stderr, and exceptions/python errors to the algorithm logger.

[Edit]: Since it seems that such an algorithm cannot run within python, I am using a Python algorithm instead. It can still be used in LoadLiveData within MantidPlot.

[Nick Draper]

Janik,

I'm not sure this is the way to go. I think we need to talk about this, I'll try to give you a call today, I'm interviewing, but should be able to fit it in between.

I still think that python algorithms are the right choice, you had concerns, but as far as I know you can run a python algorithm from within a C++ one, you just have to use the algorithm interface, and you can register changes to and additional python algorithms at run time, without having to restart MantidPlot.

[Nick Draper]

Ok i'm clear on this one as long as it is an additional option as well as py Algs.

[Janik Zikovsky]

Refs #4873 first stab at RunPythonScript C++ algorithm

Changeset: 32b971375668b8df5d577c9ae70d93f0ed075c6e

[Janik Zikovsky]

Refs #4873 Python Algorithm to run a snippet of python code

The C++ algorithm works, but you cannot start a python script that launches the C++ RunPythonScript to run python (I imagine you can't have two python instances running at the same time)

Changeset: 7b8be9d38418a6338c2469c771296ae79448f0c0

[Janik Zikovsky]

Refs #4873 disable C++ test for RunPythonScript

Changeset: 52ba17545db016ef4574a67726dd17b925f9a654

[Janik Zikovsky]

Refs #4873 unit test for RunPythonScript.py

Changeset: 84bd4bc9d41bc2e33036b0b9d16c703f290e5f07

[Janik Zikovsky]

Refs #4873 remove the C++ python algorithm attempt

Changeset: 28b14821ad77421549ce1f1f78f9a94c4957acfc

[Janik Zikovsky]

Refs #4873 handle do-nothing script in RunPythonScript.py

Changeset: 379c2a8c44e998d904bdbf61e86ceecde5c29de1

[Janik Zikovsky]

Refs #4873 use generic Workspace properties in RunPythonScript

Refs #4915

Changeset: f67230feca6f1403e2f83cfa35ca1e4ef6039ca8

[Janik Zikovsky]

Refs #4873 first stab at RunPythonScript C++ algorithm

Changeset: 32b971375668b8df5d577c9ae70d93f0ed075c6e

[Janik Zikovsky]

Refs #4873 Python Algorithm to run a snippet of python code

The C++ algorithm works, but you cannot start a python script that launches the C++ RunPythonScript to run python (I imagine you can't have two python instances running at the same time)

Changeset: 7b8be9d38418a6338c2469c771296ae79448f0c0

[Janik Zikovsky]

Refs #4873 disable C++ test for RunPythonScript

Changeset: 52ba17545db016ef4574a67726dd17b925f9a654

[Janik Zikovsky]

Refs #4873 unit test for RunPythonScript.py

Changeset: 84bd4bc9d41bc2e33036b0b9d16c703f290e5f07

[Janik Zikovsky]

Refs #4873 remove the C++ python algorithm attempt

Changeset: 28b14821ad77421549ce1f1f78f9a94c4957acfc

[Janik Zikovsky]

Refs #4873 handle do-nothing script in RunPythonScript.py

Changeset: 379c2a8c44e998d904bdbf61e86ceecde5c29de1

[Janik Zikovsky]

Refs #4873 use generic Workspace properties in RunPythonScript

Refs #4915

Changeset: f67230feca6f1403e2f83cfa35ca1e4ef6039ca8

[Stuart Campbell]

Seems to run ok, Just tried a simple script like

print input.blocksize()

[Stuart Campbell]

This ticket has been transferred to github issue ​5720