new_contents: from unittest import TestCase
  import requests
  import json
  
  #curl -H "Content-Type: application/json;charset=UTF-8 " -X POST -d '{"id":90,"asciimath":"", "mathml":"", "latex":"x \\lt y"}' http://host:port/latex_ to_asciimath
  
  
  class TestBatch(TestCase):
  
      def setUp(self):
          self.host = 'your host ip:port here'
  
      def test_mathml2latex(self):
          cuda1_host = 'http://' + self.host + '/latex_to_asciimath'
  
          payload = {"id":90,"asciimath":"", "mathml":"", "latex":"x \\lt y"}
          headers = {'content-type': 'application/json'}
          r = requests.post(cuda1_host, data=json.dumps(payload), headers=headers)
          print '\n' + r.text
subject: add test for latex2mathml rest service.