diff options
Diffstat (limited to 'lib/sqlalchemy/util')
| -rw-r--r-- | lib/sqlalchemy/util/_collections.py | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/sqlalchemy/util/_collections.py b/lib/sqlalchemy/util/_collections.py index 3adbf9913..1a965e30d 100644 --- a/lib/sqlalchemy/util/_collections.py +++ b/lib/sqlalchemy/util/_collections.py @@ -376,6 +376,9 @@ class IdentitySet(object): def clear(self): self._members.clear() + def __sub__(self, other): + return self.difference(other) + def __cmp__(self, other): raise TypeError('cannot compare sets using cmp()') |