import json
import os
import sys

for dirname, dirnames, filenames in os.walk(sys.argv[1]):
	for filename in filenames:
		fp = open(filename)
		JSON = json.load(fp)
		len(JSON.items()[3][1])

		if (len >= 500):
			[minx, miny, maxx, maxy] = test.replace('.json','').split(',')

			if (not os.path.isfile(')):