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Name	Size	Permission	Date
__pycache__	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
dnssecalgs	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
quic	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
rdtypes	[ DIR ]	drwxr-xr-x	2025-04-04 08:00
__init__.py	1.62 KB	-rw-r--r--	2025-04-04 08:00
_asyncbackend.py	2.34 KB	-rw-r--r--	2025-04-04 08:00
_asyncio_backend.py	8.84 KB	-rw-r--r--	2025-04-04 08:00
_ddr.py	5.12 KB	-rw-r--r--	2025-04-04 08:00
_features.py	2.43 KB	-rw-r--r--	2025-04-04 08:00
_immutable_ctx.py	2.4 KB	-rw-r--r--	2025-04-04 08:00
_trio_backend.py	8.27 KB	-rw-r--r--	2025-04-04 08:00
asyncbackend.py	2.73 KB	-rw-r--r--	2025-04-04 08:00
asyncquery.py	30.1 KB	-rw-r--r--	2025-04-04 08:00
asyncresolver.py	17.43 KB	-rw-r--r--	2025-04-04 08:00
dnssec.py	40.74 KB	-rw-r--r--	2025-04-04 08:00
dnssectypes.py	1.76 KB	-rw-r--r--	2025-04-04 08:00
e164.py	3.88 KB	-rw-r--r--	2025-04-04 08:00
edns.py	16.69 KB	-rw-r--r--	2025-04-04 08:00
entropy.py	4.14 KB	-rw-r--r--	2025-04-04 08:00
enum.py	3.6 KB	-rw-r--r--	2025-04-04 08:00
exception.py	5.81 KB	-rw-r--r--	2025-04-04 08:00
flags.py	2.69 KB	-rw-r--r--	2025-04-04 08:00
grange.py	2.09 KB	-rw-r--r--	2025-04-04 08:00
immutable.py	1.97 KB	-rw-r--r--	2025-04-04 08:00
inet.py	5.64 KB	-rw-r--r--	2025-04-04 08:00
ipv4.py	2.49 KB	-rw-r--r--	2025-04-04 08:00
ipv6.py	6.4 KB	-rw-r--r--	2025-04-04 08:00
message.py	66.59 KB	-rw-r--r--	2025-04-04 08:00
name.py	41.78 KB	-rw-r--r--	2025-04-04 08:00
namedict.py	3.91 KB	-rw-r--r--	2025-04-04 08:00
nameserver.py	9.88 KB	-rw-r--r--	2025-04-04 08:00
node.py	12.37 KB	-rw-r--r--	2025-04-04 08:00
opcode.py	2.67 KB	-rw-r--r--	2025-04-04 08:00
py.typed	0 B	-rw-r--r--	2025-04-04 08:00
query.py	54.98 KB	-rw-r--r--	2025-04-04 08:00
rcode.py	4.06 KB	-rw-r--r--	2025-04-04 08:00
rdata.py	30.29 KB	-rw-r--r--	2025-04-04 08:00
rdataclass.py	2.91 KB	-rw-r--r--	2025-04-04 08:00
rdataset.py	16.27 KB	-rw-r--r--	2025-04-04 08:00
rdatatype.py	7.27 KB	-rw-r--r--	2025-04-04 08:00
renderer.py	10.99 KB	-rw-r--r--	2025-04-04 08:00
resolver.py	72 KB	-rw-r--r--	2025-04-04 08:00
reversename.py	3.74 KB	-rw-r--r--	2025-04-04 08:00
rrset.py	8.96 KB	-rw-r--r--	2025-04-04 08:00
serial.py	3.52 KB	-rw-r--r--	2025-04-04 08:00
set.py	9 KB	-rw-r--r--	2025-04-04 08:00
tokenizer.py	23.03 KB	-rw-r--r--	2025-04-04 08:00
transaction.py	22.06 KB	-rw-r--r--	2025-04-04 08:00
tsig.py	11.15 KB	-rw-r--r--	2025-04-04 08:00
tsigkeyring.py	2.57 KB	-rw-r--r--	2025-04-04 08:00
ttl.py	2.91 KB	-rw-r--r--	2025-04-04 08:00
update.py	11.96 KB	-rw-r--r--	2025-04-04 08:00
version.py	1.88 KB	-rw-r--r--	2025-04-04 08:00
versioned.py	11.49 KB	-rw-r--r--	2025-04-04 08:00
win32util.py	8.67 KB	-rw-r--r--	2025-04-04 08:00
wire.py	2.76 KB	-rw-r--r--	2025-04-04 08:00
xfr.py	12.96 KB	-rw-r--r--	2025-04-04 08:00
zone.py	50.87 KB	-rw-r--r--	2025-04-04 08:00
zonefile.py	27.27 KB	-rw-r--r--	2025-04-04 08:00
zonetypes.py	690 B	-rw-r--r--	2025-04-04 08:00

Rename

# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

# This implementation of the immutable decorator requires python >=
# 3.7, and is significantly more storage efficient when making classes
# with slots immutable.  It's also faster.

import contextvars
import inspect

_in__init__ = contextvars.ContextVar("_immutable_in__init__", default=False)

class _Immutable:
    """Immutable mixin class"""

# We set slots to the empty list to say "we don't have any attributes".
    # We do this so that if we're mixed in with a class with __slots__, we
    # don't cause a __dict__ to be added which would waste space.

__slots__ = ()

def __setattr__(self, name, value):
        if _in__init__.get() is not self:
            raise TypeError("object doesn't support attribute assignment")
        else:
            super().__setattr__(name, value)

def __delattr__(self, name):
        if _in__init__.get() is not self:
            raise TypeError("object doesn't support attribute assignment")
        else:
            super().__delattr__(name)

def _immutable_init(f):
    def nf(*args, **kwargs):
        previous = _in__init__.set(args[0])
        try:
            # call the actual __init__
            f(*args, **kwargs)
        finally:
            _in__init__.reset(previous)

nf.__signature__ = inspect.signature(f)
    return nf

def immutable(cls):
    if _Immutable in cls.__mro__:
        # Some ancestor already has the mixin, so just make sure we keep
        # following the __init__ protocol.
        cls.__init__ = _immutable_init(cls.__init__)
        if hasattr(cls, "__setstate__"):
            cls.__setstate__ = _immutable_init(cls.__setstate__)
        ncls = cls
    else:
        # Mixin the Immutable class and follow the __init__ protocol.
        class ncls(_Immutable, cls):
            # We have to do the __slots__ declaration here too!
            __slots__ = ()

@_immutable_init
            def __init__(self, *args, **kwargs):
                super().__init__(*args, **kwargs)

if hasattr(cls, "__setstate__"):

@_immutable_init
                def __setstate__(self, *args, **kwargs):
                    super().__setstate__(*args, **kwargs)

# make ncls have the same name and module as cls
        ncls.__name__ = cls.__name__
        ncls.__qualname__ = cls.__qualname__
        ncls.__module__ = cls.__module__
    return ncls