CaseInsensitiveDict (structures.py)

requests.structures ~~~~~~~~~~~~~~~~~~~ Data structures that power Requests.

"""
requests.structures
~~~~~~~~~~~~~~~~~~~

Data structures that power Requests.
"""

from __future__ import annotations

from collections import OrderedDict
from collections.abc import Iterable, Iterator, Mapping
from typing import Any, Generic, TypeVar, overload

from .compat import MutableMapping

_VT = TypeVar("_VT")
_D = TypeVar("_D")


class CaseInsensitiveDict(MutableMapping[str, _VT], Generic[_VT]):
    """A case-insensitive ``dict``-like object.

    Implements all methods and operations of
    ``MutableMapping`` as well as dict's ``copy``. Also
    provides ``lower_items``.

    All keys are expected to be strings. The structure remembers the
    case of the last key to be set, and ``iter(instance)``,
    ``keys()``, ``items()``, ``iterkeys()``, and ``iteritems()``
    will cont

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