Dump a CSV file to a JSON string

csv_to_json.py

#!/usr/bin/env python

import csv
import json

def convert(fn, outfile):
    """
    Open a filename, read it as CSV,
    dump out a string of JSON to an outfile
    """
    with open(fn) as f:
        reader = csv.DictReader(f)
        table = [row for row in reader]
        outfile.write(json.dumps(table))

if __name__ == "__main__":
    import sys
    convert(sys.argv[1], sys.stdout)