if you have a lot of json files with the same structure and need some piece from all of them ...

json getter

#!/usr/bin/python

# jsongetter.py
#
# reads json file/s,
# gets a part specified in a Python dict/list notation,
# prints formatted contents
#
# $ jsongetter.py <keys> [file1 file2 ...]
#
# $ jsonformatter "['uncle']['name']" uncles/joe.json
# Joe

import sys, json, traceback

query = sys.argv[1]
files = sys.argv[2:]

for f in files:
  title = ''
  if len(files) > 1:
    title = '== %s\n\n' % f

  try:
    data = json.load(open(f))
    result = eval('data'+query.strip())
    print title + json.dumps(result, indent=2)
    print '\n'
  except:
    pass
    #print traceback.format_exc()