flatten json using flatten_json

flatten.py

#!/usr/bin/env python3

import flatten_json
import sys
import json

if __name__ == '__main__':
	if len(sys.argv) < 3:
		print(f'usage: {sys.argv[0]} in.csv out.csv')
	f_out = open(sys.argv[2], 'w')
	for line in open(sys.argv[1]):
		j2 = flatten_json.flatten_json(json.loads(line))
		f_out.write(json.dumps(j2))
		f_out.write("\n")