how to execute a python script in jenkins pipeline as a stage and use the output of python script to declare further stages in pipeline as next stage

Question

I have written a python script which provides me a output like this as a dictionary,

test.py:

{'job-name': 'Test1', 'action': 'a', 'targetname': 'x'}
{'job-name': 'Test2', 'action': 'b', 'targetname': 'y'}
{'job-name': 'Test3', 'action': 'c', 'targetname': 'z'}

1. How to execute this python script in jenkins pipeline i.e as declarative jenkins pipeline as a stage 1
2. how to use the output of python script in stage 2 , I want to define the stage names using the output of python script. 1.I want to grep only the Test1 ,Test2 , Test3 as stage name from the dictionary i.e the output of python script

stage(Test1)
{

}

stage(Test2)
{

}
stage(Test3)
{

}

How to do this in groovy jenkins pipeline as declarative jenkins pipeline .