diff options
Diffstat (limited to 'dns/immutable.py')
| -rw-r--r-- | dns/immutable.py | 17 |
1 files changed, 12 insertions, 5 deletions
diff --git a/dns/immutable.py b/dns/immutable.py index dc48fe8..7cc39dd 100644 --- a/dns/immutable.py +++ b/dns/immutable.py @@ -3,13 +3,19 @@ import collections.abc import sys +# pylint: disable=unused-import if sys.version_info >= (3, 7): odict = dict + from dns._immutable_ctx import immutable else: - from collections import OrderedDict as odict # pragma: no cover + # pragma: no cover + from collections import OrderedDict as odict + from dns._immutable_attr import immutable # noqa +# pylint: enable=unused-import -class ImmutableDict(collections.abc.Mapping): +@immutable +class Dict(collections.abc.Mapping): def __init__(self, dictionary, no_copy=False): """Make an immutable dictionary from the specified dictionary. @@ -28,9 +34,10 @@ class ImmutableDict(collections.abc.Mapping): def __hash__(self): if self._hash is None: - self._hash = 0 + h = 0 for key in sorted(self._odict.keys()): - self._hash ^= hash(key) + h ^= hash(key) + object.__setattr__(self, '_hash', h) return self._hash def __len__(self): @@ -58,5 +65,5 @@ def constify(o): cdict = odict() for k, v in o.items(): cdict[k] = constify(v) - return ImmutableDict(cdict, True) + return Dict(cdict, True) return o |