gistfile1.txt

//-------- Client side
var my_array = ['a', 'b', 'c'];
$.get('/api/end_point', {arr: JSON.stringify(my_array)}, function(data) { //note that we stringify the array before sending it
  //we assume everything went well on the server
}, 'json');



#--------- Server side
import json
class ArrayRequestHandler(webapp2.RequestHandler):
  def get(self):
    python_list = json.loads(self.request.get('arr'))   #we rebuild the JSON from the string received
    single_var = python_list[0]