fatto

   missions = []

   resp = requests.get(_url('/authorities/missions/'))

   _check_resp(resp)

   print resp.json()['result']

   for m_item in resp.json()['result']:

      missions.append( Mission(m_item['name'] ))

      print(m_item)

      this_m = json.loads( "{'name': 'Apollo 11'}" )

      #this_m = json.load( "{'name': 'Apollo 11'}" )

   return missions

def get_missions2():

class Filter:

   def __init__(self):

      self.mission = None

      self.landmark = None

      self.specimenType = None

      self.samplingTechnique = None

      self.analyzedMaterial = None

      self.analyte = None

      self.analysisMethod = None

   def _toJSON(self):

      return json.dumps(self, default=lambda o: o.__dict__,sort_keys=True, indent=4)

   def get_results(self):

      print self._toJSON()

      resp = requests.get(_url('/data/'+self._toJSON() ))

class Mission:

if __name__ == "__main__":

   m = get_missions()

   print m

   f = Filter()

   f.mission  = ["Apollo 11"]

   f.specimenType = ["Breccia"]

   #print f.toJSON()

   print f.get_results()