Using Jenkinsfiles for Continuous Deployment Pipelines

Is it possible to write the pipeline code in another language with better formatting, e.g. Python or Jython, instead of having 15 lines with nothing but '}' on it? Here's a possible rewrite of the sample from the posting:

    #!/usr/bin/env someotherlanguage
    pipeline:
        agent any
        stages:
            stage('Build') :
                steps:
                    sh './build.sh'
            stage('Test') :
                steps :
                    sh './test.sh'
            stage('Deploy') :
                steps :
                    sh './deploy.sh'
            stage('Deploy - Staging') :
                steps :
                    sh './deploy.sh staging'
                    sh './run-smoke-tests.sh'
            stage('Sanity check') :
                steps :
                    input "Does the staging environment look ok?"
            stage('Deploy - Production') :
                steps :
                    sh './deploy.sh production'

Now that can better fit on one page. Coming to think of it, are all those 'steps:', 'stages:', and 'pipeline:' clauses really necessary?