Source code for gigl.common.collections.frozen_dict
from collections.abc import Mapping
from typing import TypeVar
[docs]
class FrozenDict(Mapping[KT, VT]):
"""Frozen Dictionary implementation,
Given a dictionary, freezes it, i.e. disallows any edits or deletion
"""
def __init__(self, *args, **kwargs):
self.__dict = dict(*args, **kwargs)
self.__hash = None
def __iter__(self):
return iter(self.__dict)
def __len__(self):
return len(self.__dict)
def __getitem__(self, key):
return self.__dict[key]
def __eq__(self, other: object) -> bool:
"""Check equality against another object
Args:
other (object): Dictionary like object or FrozenDict
Returns:
bool: Returns true if the current instance of frozen dict matches the
other dictionary / frozen dict
"""
if isinstance(other, FrozenDict):
return hash(self) == hash(other)
if not isinstance(other, Mapping):
return False
if len(self) != len(other):
return False
for self_key, self_val in self.items():
if self_key not in other:
return False
if self_val != other[self_key]:
return False
return True
def __hash__(self):
if self.__hash is None:
self.__hash = hash(tuple(sorted(self.__dict.items())))
return self.__hash
def __repr__(self) -> str:
return self.__dict.__repr__()
