diff options
Diffstat (limited to 'Lib/functools.py')
| -rw-r--r-- | Lib/functools.py | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Lib/functools.py b/Lib/functools.py index 539dc90..d75e44a 100644 --- a/Lib/functools.py +++ b/Lib/functools.py @@ -67,8 +67,9 @@ def total_ordering(cls): ('__lt__', lambda self, other: not self >= other)] } roots = set(dir(cls)) & set(convert) - assert roots, 'must define at least one ordering operation: < > <= >=' - root = max(roots) # prefer __lt __ to __le__ to __gt__ to __ge__ + if not roots: + raise ValueError('must define at least one ordering operation: < > <= >=') + root = max(roots) # prefer __lt__ to __le__ to __gt__ to __ge__ for opname, opfunc in convert[root]: if opname not in roots: opfunc.__name__ = opname |