Workflow Python environment DICT variable

Hi, I am trying to learn how to setup a workflow for my Python3 script.
In my code I have a dict variable named Parameter[“Mode1”].

Anyone that can help me how to be able to add this variable in the yml-file.


Could you describe with a bit more detail (ideally with code) what you’re trying to achieve? I guess something along the lines of creating an output or environment variable from a variable in your Python code?


This the yml file that I have created.


I have some input from a system that I want to have static values in the test.

Parameters is a dictionary, I think, these variables exists

I’m afraid I can’t see the content of the file here, you’d need to copy or link it.

How to do that depends on how your code receives the input from that other system.

Sorry, try this link

It is Domoticz software.

Do you know how to create a Dict as variable for workflow, then I think it can work.

The error from workflow is that it is missing the variable “Parameters”

Thanks for your help

This is the result for the latest test

OK now I see, I have totally misunderstood workflow.
I need to build a setup file for pytest, it was crashing on flake8, so I removed that one and now I need to understand how to collect output

This looks like a misunderstanding about how environment variables work:

      Parameters["Mode1"]: 123

What are you trying to achieve with that? Do you want to set a dict element within your Python code?

Yes, that is what I want to do :slight_smile:

That’s not (directly) possible from the workflow. The env keyword lets you set environment variables, that’s what shows up in Python in os.environ.

If you do something like this in the workflow:

  - run: python3
      MODE_1: 123

And the script looks like this:

import os

You’ll see “123” as the output. If you want to set variables via the environment your code needs to read them from there.

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ok thanks.

a basic question:

if I have a py-file like this:

Do you know how to write a workflow test for this?
dict a is getting data from the system(Domoticz) and look like this when it has access to the system e.g. {‘a1’: 1, ‘a2’: 2}
now I want to set the dict inside my workflow, to be used during the test and want to see the output, which shall be 3 if I set a[“a1”]=1 and a[“a2”]=2

do you know how to do that?

thanks a lot so far

Sounds like the Domoticz system injects the a (or Parameters) variable into your module? If that’s the case you’ll have to do the same during your test setup.

Here’s a minimal (two files) example using unittest, I assume you can do something similar with pytest if you prefer. unittest has some nicer ways to do this with unittest.mock.patch(), but I want to show the principle.

def func():
    return a['x'] + a['y']
import unittest
import plugin

class PluginTest(unittest.TestCase):
    def setUp(self):
        # this is where the magic happens
        plugin.a = {'x': 1, 'y': 2}

    def test_func(self):
        b = plugin.func()
        self.assertEqual(b, 3)

That said, injecting variables like that seems like a questionable design choice to me. It would probably be better to define a class that represents your plugin and pass the parameters to the constructor.

1 Like