| #!/usr/bin/env python |
| # |
| # Copyright 2007 Google Inc. |
| # |
| # Licensed under the Apache License, Version 2.0 (the "License"); |
| # you may not use this file except in compliance with the License. |
| # You may obtain a copy of the License at |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # |
| """Provides ValueMixin. |
| |
| ValueMixin provides comparison (including equality) methods and hashing |
| based on the values of fields. |
| """ |
| |
| |
| class ValueMixin(object): |
| def __cmp__(self, other): |
| |
| |
| |
| |
| |
| |
| if hasattr(other, '__dict__'): |
| return self.__dict__.__cmp__(other.__dict__) |
| else: |
| return 1 |
| |
| def __hash__(self): |
| return hash(frozenset(self.__dict__.items())) |
| |
| def __repr__(self): |
| |
| d = self.__dict__ |
| attrs = ['%s=%r' % (key, d[key]) for key in sorted(d)] |
| return '%s(%s)' % (self.__class__.__name__, ', '.join(attrs)) |
