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| 1 # Copyright (C) 2013 Google Inc. All rights reserved. | 1 # Copyright (C) 2013 Google Inc. All rights reserved. | 
| 2 # | 2 # | 
| 3 # Redistribution and use in source and binary forms, with or without | 3 # Redistribution and use in source and binary forms, with or without | 
| 4 # modification, are permitted provided that the following conditions are | 4 # modification, are permitted provided that the following conditions are | 
| 5 # met: | 5 # met: | 
| 6 # | 6 # | 
| 7 #     * Redistributions of source code must retain the above copyright | 7 #     * Redistributions of source code must retain the above copyright | 
| 8 # notice, this list of conditions and the following disclaimer. | 8 # notice, this list of conditions and the following disclaimer. | 
| 9 #     * Redistributions in binary form must reproduce the above | 9 #     * Redistributions in binary form must reproduce the above | 
| 10 # copyright notice, this list of conditions and the following disclaimer | 10 # copyright notice, this list of conditions and the following disclaimer | 
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| 87                 yield name, value_list | 87                 yield name, value_list | 
| 88 | 88 | 
| 89     valid_extended_attributes = {} | 89     valid_extended_attributes = {} | 
| 90     for name, value_list in extended_attribute_name_values(): | 90     for name, value_list in extended_attribute_name_values(): | 
| 91         if not value_list: | 91         if not value_list: | 
| 92             valid_extended_attributes[name] = set([None]) | 92             valid_extended_attributes[name] = set([None]) | 
| 93             continue | 93             continue | 
| 94         valid_extended_attributes[name] = set([value if value else None | 94         valid_extended_attributes[name] = set([value if value else None | 
| 95                                                for value in value_list]) | 95                                                for value in value_list]) | 
| 96     return valid_extended_attributes | 96     return valid_extended_attributes | 
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