Passing arguments to python script in Azure Devops - python-3.x

Question

I am trying to pass a system variable to the python script from azure devops. This is what I currently have in Yaml file:
- script: pytest test/test_pipeline.py
--$(global_variable)
--junitxml=$(Build.StagingDirectory)/test_pipeline-results.xml
displayName: 'Testing Pipeline'
condition: always()
The variable I need in my script is $(global_variable). The variable contains a value of $(Build.SourcesDirectory). It is the global variable. I am getting an error message as "unrecognised arguments" when I run the job.
Any help to tackle this will be helpful.
Thanks!
EDIT:
Complete log:
`##[section]Starting: Testing Pipeline
==============================================================================
Task : Command line
Description : Run a command line script using Bash on Linux and macOS and cmd.exe on Windows
Version : 2.151.2
Author : Microsoft Corporation
Help : https://learn.microsoft.com/azure/devops/pipelines/tasks/utility/command-line
==============================================================================
Generating script.
Script contents:
pytest test/test_pipeline.py --my_param="/home/vsts/work/1/s" --junitxml=/home/vsts/work/1/a/test_pipeline-results.xml
========================== Starting Command Output ===========================
[command]/bin/bash --noprofile --norc /home/vsts/work/_temp/64fb4a65-90de-42d5-bfb3-58cc8aa174e3.sh
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: unrecognized arguments: --my_param=/home/vsts/work/1/s
inifile: None
rootdir: /home/vsts/work/1/s
##[error]Bash exited with code '4'.
##[section]Finishing: Testing Pipeline`

Answer 1

I tried to write a simple sample for you refer.
In your .py file, please use add_argument to read in the command line parameter. In this issue, this command line parameter comes from your task specified.
A.py file:
import argparse
def parse_argument():
parse = argparse.ArgumentParser(description="ForTest!")
parse.add_argument("-test_data")
parse.add_argument("-build_dir")
And then, in PythonScript#0 task:
scriptPath: ‘A.py’
argument: -test_data $(myVariable1) -build_dir $(myVariable2)
myVariable1 and myVariable2 are all my customized variable. You can all use environment variable.
Since in python script, add_argument is used to read in the parameter which from command line. So it can receive the value from Argument specified.
In addition, for the issue which in your question, I think you’d better delete the content from your script: --my_param="/home/vsts/work/1/s" and try again. Because --my_param could not the valid argument for pytest.
Hope can help you.