Extract test directory owner email addresses from W3CImportExpectations.

third_party/WebKit/Tools/Scripts/generate-w3c-directory-owner-json

-#!/usr/bin/python
-# Copyright 2016 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Converts CSV files to machine-readable JSON.
-
-Example usage:
-
-./csv_to_json input.csv --output directory_owners.json\
---skip-keys number-tests\
--f directory test-number team notification-email other-contact component
-"""
-
-import argparse
-import csv
-import json
-import sys
-
-
-def main(argv):
-    parser = argparse.ArgumentParser()
-    parser.add_argument('filename', metavar='filename',
-                        help='The path to the input CSV file.')
-    parser.add_argument('-o', '--output',
-                        help='The output file name.')
-    parser.add_argument('-f', '--field-names', nargs='*',
-                        help='The ordered field names of the CSV file. Defaults to first row.')
-    parser.add_argument('-s', '--skip-keys', nargs='*',
-                        help='Fields that should be skipped.')
-    args = parser.parse_args()
-    convert_csv_to_json(args.filename, args.output, args.field_names, args.skip_keys)
-
-
-def convert_csv_to_json(filename, output_filename=None, field_names=None, skip_keys=None):
-    out = output_filename or (filename + '.json')
-    dict_list = []
-    json_file = open(out, 'w')
-    with open(filename) as csv_file:
-        reader = csv.DictReader(csv_file, fieldnames=field_names)
-        for row in reader:
-            if not row['directory'].startswith('external'):
-                continue
-            if skip_keys:
-                for s in skip_keys:
-                    del row[s]
-            dict_list.append(row)
-        json.dump(dict_list, json_file, indent=4)
-
-
-if __name__ == '__main__':
-    main(sys.argv[1:])