| # Copyright 2013 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. |
| |
| import re |
| |
| |
| def ToUnderscore(obj): |
| """Converts a string, list, or dict from camelCase to lower_with_underscores. |
| |
| Descends recursively into lists and dicts, converting all dict keys. |
| Returns a newly allocated object of the same structure as the input. |
| """ |
| if isinstance(obj, basestring): |
| return re.sub('(?!^)([A-Z]+)', r'_\1', obj).lower() |
| |
| elif isinstance(obj, list): |
| return [ToUnderscore(item) for item in obj] |
| |
| elif isinstance(obj, dict): |
| output = {} |
| for k, v in obj.iteritems(): |
| if isinstance(v, list) or isinstance(v, dict): |
| output[ToUnderscore(k)] = ToUnderscore(v) |
| else: |
| output[ToUnderscore(k)] = v |
| return output |
| |
| else: |
| return obj |
