Calling Python functions, some issues.

[TTEng]

I am using the python step type in TS 2016 32 bit version. Currently working with Python 3.6.x

I want to first start by saying I have gone through the examples provided and understand how they work.

First I initialize my object reference to the class that I am using.

Next I do something like a "string value tests" and click on "configure Python Step"

I select "Operation Scope" drop down menu and have the option to pick "Class Instance" or "Class static" or "Module."

The problem:

If I pick "Class Static" all the drop menus will populate with my classes and Function names, that's Great!

1. But if i pick "Class Instanced" none of the functions populate. Is this designed this way on purpose  even though my functions are "instanced"?

2. When ever I update my python code and change the name of a function for example; I can see the new function by pressing the "refresh blue icon" but none of the calls to my functions work and i get an error. The error always says "MyClassNameHere object has no attribute MyFunctionHere .....NI_teststand_helper.py line 30"

Essentially what this error is telling me is that TestStand is still holding some reference to my last .py code and cant properly find the updated one. I can delete my .seq file and restart TS and have success calling my edited .py but otherwise that old code is stuck in memory....or something.

[hbs_80]

Try to 'Unload All Modules' it works with me

[hbs_80]

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I am using the python step type in TS 2016 32 bit version. Currently working with Python 3.6.x

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By the way, can you tell me how did you install Python step for TS 32 bit?

I installed a fresh Windows 10 64 bit, TS 2017 32 bit, Python 3.6.5 32 bit and Python Step. But I am still getting 'Invalid Python version' (see attached picture).

Same behavior also on win 7

with TS 2017 64 bit and Python 3.6 64 bit, it works without any problem

[mini_xx]

Hi,

I have same issue and does happen with example sequence provided by installation: Passing Data to Python.seq

However function(s) does work if you know what to call. But would be nice to see available methods without opening python source files.

[TTEng]

@hbs_80

This might be a good temporary solution. I will try it and let you know.

[TTEng]

@hbs_80

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@hbs_80 wrote:

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I am using the python step type in TS 2016 32 bit version. Currently working with Python 3.6.x

---

By the way, can you tell me how did you install Python step for TS 32 bit?

I installed a fresh Windows 10 64 bit, TS 2017 32 bit, Python 3.6.5 32 bit and Python Step. But I am still getting 'Invalid Python version' (see attached picture).

Same behavior also on win 7

with TS 2017 64 bit and Python 3.6 64 bit, it works without any problem

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I installed Python 3.6.8 for windows 32 found on their site. (https://www.python.org/downloads/windows/)

For the NI stepType I went to NI's page and installed "PythonST.exe" (http://www.ni.com/download/teststand-python-step-types/7761/en/)

I re-booted my PC and the step type recognized which version of Python I have installed.

-side note this might not be required but you may need to edit your "environment variable" found in windows specifically "Path." I didn't need to but a co-worker of mine recommend I add python to them.

[TTEng]

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@mini_xx wrote:

Hi,

I have same issue and does happen with example sequence provided by installation: Passing Data to Python.seq

However function(s) does work if you know what to call. But would be nice to see available methods without opening python source files.

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Thanks mini_xx for posting a picture. Glad i'm not the only one.

Do you know anything about closing object references in TS? Essentially my number 2?

[TTEng]

I found this on the last page..... Go to %teststandpublic%\Components\StepTypes\NIPython and open the PDF called "NIPythonStepType.pdf" and read the literal last line:

That answers my #1

Known Issues
• When using Python 3.6+ class instance methods present in a Python class are listed as
class static methods in the step settings dialog.

But thank you everyone else for confirming it does not work.

[mini_xx]

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@TTEng wrote:

I found this on the last page..... Go to %teststandpublic%\Components\StepTypes\NIPython and open the PDF called "NIPythonStepType.pdf" and read the literal last line:

That answers my #1

Known Issues
• When using Python 3.6+ class instance methods present in a Python class are listed as
class static methods in the step settings dialog.

But thank you everyone else for confirming it does not work.

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Thanks for the reference. Glad to hear it is known issue.

[mini_xx]

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@TTEng wrote:

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@mini_xx wrote:

Hi,

I have same issue and does happen with example sequence provided by installation: Passing Data to Python.seq

However function(s) does work if you know what to call. But would be nice to see available methods without opening python source files.

---

Thanks mini_xx for posting a picture. Glad i'm not the only one.

Do you know anything about closing object references in TS? Essentially my number 2?

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Does the same document on page 4 also say that you should do "unload all modules" if sources are modified:

Note If you update the code module, you must unload all previous code modules in
order for the new code to be considered when it is loaded for execution.