LabVIEW Real-Time Idea Exchange

About LabVIEW Real-Time Idea Exchange

Have a LabVIEW Real-Time Idea?

  1. Does your idea apply to LabVIEW in general? Get the best feedback by posting it on the original LabVIEW Idea Exchange.
  2. Browse by label or search in the LabVIEW Real-Time Idea Exchange to see if your idea has previously been submitted. If your idea exists be sure to vote for the idea by giving it kudos to indicate your approval!
  3. If your idea has not been submitted click New Idea to submit a product idea to the LabVIEW Real-Time Idea Exchange. Be sure to submit a separate post for each idea.
  4. Watch as the community gives your idea kudos and adds their input.
  5. As NI R&D considers the idea, they will change the idea status.
  6. Give kudos to other ideas that you would like to see in a future version of LabVIEW Real-Time!
Top Authors
cancel
Showing results for 
Search instead for 
Did you mean: 
JKSoerensen

Python Node support on LabVIEW Realtime systems

Status: New

Hello Fellow developers and engineers.

 

Based on the discussion in this thread I would like to propose the following:

 

My suggestion is to open support for execution of python nodes on Labview Real-Time targets. This is currently not supported by LabVIEW 2018 Current Gen, even though this version supports executing a python node using the new "Connectivity -> Python"-support. 

This should be possible to do on the targets using NI Linux Realtime as the operating system, since Linux treats python as a native application language.

 

I understand that the execution of Python scripts are not deterministic, which will prevent an implementation in time critical code. That I can follow, but it should be possible to use the python node in lower priority threads or non real-time code, for communication with a REST-API, downloading/uploading files, connectivity to online services and so on. 

It has been shown that python can be compiled and executed on real-time targets, here on the forums by Sev_k in this thread: Getting the Most Out of your NI Linux Real-Time Target

 

Therefore I propose to simplify this implementation and open the support for Python3.

 

Some additional implementations are essential for the success: 

  • Selection of Python runtime should be fixed to python3, since python 2 will be without further support or active development from 2020-01-01 going forward. 
  • It would gain the best momentum if it was possible to deploy python from the Device Software installation as part of the build specification of the real-time application.
  • Python developers can specify their external requirements for additional code by defining a "requirements.txt" or "pipfile.lock" depending on the virtualization method and choice of development style. If the project manager or build specification could read/parse this for the starting point of the application to prevent manual labour and possible errors.

 

Backwards Compatibility:

Support for this should be from LabVIEW 2018 and forward, since these have support for the python nodes.

 

Best Regards

Jesper

GCentral
CTD + CLD + Pythonista
6 Comments
zcollins
Member

Adding Python Node support in LVRT would be very beneficial for my group.  Particularly for the new NI Linux RT on PXI Controllers.

armin.riess
Member

Python node in RT Linux would be extremely appreciated, as it is a prerequisite for contemporary productivity tools.

Especially for prototyping with Neuronal Networks, Deep Learing,.... highly demanded.

David_GT
Member

Agreed.  We would like to be able to use Python as a core language for teaching while still using NI's high-quality RT Linux targets.

VijayAundhekar1
Member

I agree with this idea.

tyale
Member

Can we get a response from someone at NI on the status/general feelings of this?

 

There are plenty of restrictions that I am willing to accept if it means I can do things like allow a customer to design their own transfer function in a legitimate programming language. Seriously.

JKSoerensen
Member

Hello All. 

@David_le For accessing the NI hardware it should be possible using https://nidaqmx-python.readthedocs.io/en/latest/ combined with the NI Compact RIO 904x and 905x series. only downside is that we cannot start a python session on the RT it self.

 

Additionally Tyale the problem you refer with having a text implementation of a transfer function has been solved by us at GPower, have a look here https://gpower.io/products/gpower-expression-parser/?lang=en

GCentral
CTD + CLD + Pythonista