Fix spawners for python3.6

[christophfroehlich]

#683 introduced an incompatibility with python 3.6, see this test.

python 3.6 is the minimum requirement for humble and default on rhel 8.

copilot told me:

The code you've provided is written in Python and uses the "walrus operator" (:=), which is a feature introduced in Python 3.8. This operator is used for assignment expressions. It assigns values to variables as part of a larger expression.The line of code where your cursor is located:

if result := function():

is using this operator. If you're seeing a syntax error, it's likely because you're using a version of Python that is older than 3.8.To fix this, you can either upgrade your Python version to 3.8 or later, or you can refactor the code to not use the walrus operator. Here's how you could refactor it:

result = function()
if result:

This will work in Python versions prior to 3.8.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (4409e77) 31.03% compared to head (16b854a) 31.03%.

Additional details and impacted files

@@           Coverage Diff           @@
##           humble    #1366   +/-   ##
=======================================
  Coverage   31.03%   31.03%           
=======================================
  Files          95       95           
  Lines       10729    10729           
  Branches     7421     7421           
=======================================
  Hits         3330     3330           
  Misses        723      723           
  Partials     6676     6676           

Flag	Coverage Δ
unittests	31.03% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

[saikishor]

The failing jobs didn't seem to be related! LGTM