Add mapping of directories to owners as json file

third_party/WebKit/Tools/Scripts/csv_to_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 usable json
+"""

[qyearsley, 2016/07/18 22:46:30]

A few more little comments:
 - I personally prefer capitalizing initialisms like CSV and JSON.
 - "machine usable" can be written as "machine-usable" (or "machine-readable").
 - Docstrings should generally be sentences with punctuation.
 - For one line docstrings, the closing quote can go on the same line.

+
+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.')

[qyearsley, 2016/07/18 22:46:30]

Capitalize "The path to..."

+    parser.add_argument('-o', '--output',
+                        help='The output file name.')
+    convert_csv_to_json(argv[0])

[qyearsley, 2016/07/18 22:46:31]

I think here you might want to do something like:

  args = argparse.parse_args()
  convert_csv_to_json(args.filename, args.output)

Right?

+
+
+def convert_csv_to_json(filename, output_filename=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)
+        for row in reader:
+            dict_list.append(row)

[qyearsley, 2016/07/18 22:46:31]

If we want to apply some transformation on each row (changing field names or
filtering out field names), then it would go here, I think.

+        json.dump(dict_list, json_file, indent=4)
+
+
+if __name__ == '__main__':
+  main(sys.argv[1:])