File "D:\PytonLesson12_2\pythonProject\lesson12_2.py", line 35, in start participant.run() ^^^^^^^^^^^^^^^ AttributeError: 'list' object has no attribute 'run'

This error is indicating that you are trying to call the run() method on a list object, which does not have that method.

To resolve this issue, you need to ensure that participant is not a list but an object that has a run() method. Check the code where participant is defined and make sure it is an instance of a class that has a run() method.

If participant is supposed to be a list of objects that have a run() method, you may need to iterate over the list and call run() on each individual object.

Here is an example of how you can iterate over a list of objects and call the run() method on each object:

for p in participant:
    p.run()

Make sure that participant is correctly defined and contains the objects you expect before calling the run() method on it.