python check in Gradle https://github.com/apache/aurora/blob/master/build.gradle#L118

python check in Gradle.gradle

task checkPython << {
    def python27Executable = ['python2.7', 'python'].find { python ->
      try {
        def check = "import sys; sys.exit(0 if sys.version_info >= (2,7) and sys.version_info < (3,) else 1)"
        return [python, "-c", check].execute().waitFor() == 0
      } catch (IOException e) {
        return false
      }
    }

    if (python27Executable == null) {
      throw new GradleException('Build requires Python 2.7.')
    } else {
      thriftEntities.python = python27Executable
    }
  }
  generateThriftEntitiesJava.dependsOn checkPython

https://github.com/captsens/clichart/blob/master/build.gradle#L58

task pythonTests << {
runPythonTests(false)
}

task pythonCoverage << {
runPythonTests(true)
}

def runPythonTests(def includeCoverage) {
def sourceFiles = fileTree(pythonScriptDir).include('/*.py')
def testFiles = fileTree('src/test/python').include('/*Test.py')
def pythonCoverageDir = file("$buildDir/reports/pythonCoverage")
def arguments = []
if (includeCoverage) {
arguments = ['--with-coverage', '--cover-erase', '--cover-html', '--cover-html-dir',
pythonCoverageDir]
delete(pythonCoverageDir)
logger.lifecycle "Coverage report can be found in $pythonCoverageDir"
}
exec {
executable = "nosetests"
args = arguments + testFiles.collect{it.getPath()}
environment = ['PYTHONPATH': pythonScriptDir]
}
}