How to pass variable integer parameter from pipeline project to another project called in Jenkins

Question

I have a) multiconfiguration project(named dummy_repo) that is parameterized, parameter name is value1. b)a pipeline project that builds the dummy_repo by calling 'build job' Below one works:

            steps{
                script {
                    def dummy_vars = [1, 2]
                    for (int i = 0; i < 2; ++i) {
                    async_test_number = i
                    echo "Printing inside loop async ${i}";
                    build job: 'dummy_repo', parameters: [string(name: 'value1', value: '1')]
                    }
                } 

What I am looking for ..is something like below.I need to run the same job with different parameters..preferably in a loop because I need to call the python script probably 20 times..

build job: 'dummy_repo', parameters: [string(name: 'value1', value: ${i})]

dummy_repo basically has a python script that takes arguments. I feed the parameter value1 to the python script. Something like,

python3 test_script --${value1}

Any suggestions on this please. Kindly throw some light if there are other better ways.