text: import json
  
  json_objects_list = []
  filename = "testdata.json"
  
  with open(filename, 'r') as f:
      for line in f:
          json_objects_list.append(json.loads(line))
  
  
  
  district_count = {}
  for record in json_objects_list:
      times = district_count.get(record['supervisor_district'], 0)
      times += 1
      #district_count.update( { record['supervisor_district'] : times } )
      district_count[record['supervisor_district']] = times
  
  print district_count
  