json_find.py

#!/usr/bin/env python
import sys
from collections import Counter
from fnmatch import fnmatch

from ijson import parse


def main():
    prefixes = Counter()
    pattern = raw_input('Pattern to find matching keys for: ')
    with open(sys.argv[1]) as f:
        parser = parse(f)
        for prefix, event, value in parser:
            if event != 'map_key':
                continue
            key = '{}.{}'.format(prefix, value)
            if fnmatch(key, pattern):
                prefixes[key] += 1
    for key, value in prefixes.most_common(50):
        print('{}: {}'.format(key, value))

if __name__ == '__main__':
    main()