diff options
Diffstat (limited to 'lib/sqlalchemy/util.py')
| -rw-r--r-- | lib/sqlalchemy/util.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/sqlalchemy/util.py b/lib/sqlalchemy/util.py index 925c59349..237772a40 100644 --- a/lib/sqlalchemy/util.py +++ b/lib/sqlalchemy/util.py @@ -40,6 +40,7 @@ if sys.version_info >= (2, 5): def __init__(self, creator): self.creator = creator + def __missing__(self, key): self[key] = val = self.creator(key) return val @@ -49,6 +50,7 @@ else: def __init__(self, creator): self.creator = creator + def __getitem__(self, key): try: return dict.__getitem__(self, key) @@ -1009,6 +1011,9 @@ class OrderedIdentitySet(IdentitySet): for o in iterable: self.add(o) +def unique_list(seq, compare_with=set): + seen = compare_with() + return [x for x in seq if x not in seen and not seen.add(x)] class UniqueAppender(object): """Appends items to a collection ensuring uniqueness. |