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# -*- coding: utf-8 -*-
"""
A simple implementation of a key case-insensitive dictionary.
..
Developers involved:
* Ivan Herman <http://www.ivan-herman.net>
* Sergio Fernández <http://www.wikier.org>
* Carlos Tejo Alonso <http://www.dayures.net>
* Alexey Zakhlestin <https://indeyets.ru/>
Organizations involved:
* `World Wide Web Consortium <http://www.w3.org>`_
* `Foundation CTIC <http://www.fundacionctic.org/>`_
:license: `W3C® Software notice and license <http://www.w3.org/Consortium/Legal/copyright-software>`_
"""
from typing import Dict, Mapping, TypeVar
_V = TypeVar("_V")
class KeyCaseInsensitiveDict(Dict[str, _V]):
"""
A simple implementation of a key case-insensitive dictionary
"""
def __init__(self, d: Mapping[str, _V]={}) -> None:
"""
:param dict d: The source dictionary.
"""
for k, v in d.items():
self[k] = v
def __setitem__(self, key: str, value: _V) -> None:
if hasattr(key, "lower"):
key = key.lower()
dict.__setitem__(self, key, value)
def __getitem__(self, key: str) -> _V:
if hasattr(key, "lower"):
key = key.lower()
return dict.__getitem__(self, key)
def __delitem__(self, key: str) -> None:
if hasattr(key, "lower"):
key = key.lower()
dict.__delitem__(self, key)
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