FM / dns

/usr/lib/python3.9/site-packages/dns

Name	Size	Mode	Actions
dnssecalgs/	-	0755	rm
quic/	-	0755	rm
rdtypes/	-	0755	rm
__pycache__/	-	0755	rm
asyncbackend.py	2796	0644	edit dl rm
asyncquery.py	26850	0644	edit dl rm
asyncresolver.py	17852	0644	edit dl rm
dnssec.py	40693	0644	edit dl rm
dnssectypes.py	1799	0644	edit dl rm
e164.py	3978	0644	edit dl rm
edns.py	15263	0644	edit dl rm
entropy.py	4242	0644	edit dl rm
enum.py	3691	0644	edit dl rm
exception.py	5957	0644	edit dl rm
flags.py	2750	0644	edit dl rm
grange.py	2148	0644	edit dl rm
immutable.py	2017	0644	edit dl rm
inet.py	5772	0644	edit dl rm
ipv4.py	2552	0644	edit dl rm
ipv6.py	6600	0644	edit dl rm
message.py	65993	0644	edit dl rm
name.py	42672	0644	edit dl rm
namedict.py	4000	0644	edit dl rm
nameserver.py	9909	0644	edit dl rm
node.py	12663	0644	edit dl rm
opcode.py	2730	0644	edit dl rm
query.py	54832	0644	edit dl rm
rcode.py	4156	0644	edit dl rm
rdata.py	29456	0644	edit dl rm
rdataclass.py	2984	0644	edit dl rm
rdataset.py	16756	0644	edit dl rm
rdatatype.py	7339	0644	edit dl rm
renderer.py	11254	0644	edit dl rm
resolver.py	73552	0644	edit dl rm
reversename.py	3828	0644	edit dl rm
rrset.py	9170	0644	edit dl rm
serial.py	3606	0644	edit dl rm
set.py	9088	0644	edit dl rm
tokenizer.py	23583	0644	edit dl rm
transaction.py	22636	0644	edit dl rm
tsig.py	11413	0644	edit dl rm
tsigkeyring.py	2633	0644	edit dl rm
ttl.py	2979	0644	edit dl rm
update.py	12243	0644	edit dl rm
version.py	1926	0644	edit dl rm
versioned.py	11765	0644	edit dl rm
win32util.py	9107	0644	edit dl rm
wire.py	2830	0644	edit dl rm
xfr.py	13273	0644	edit dl rm
zone.py	52086	0644	edit dl rm
zonefile.py	27929	0644	edit dl rm
zonetypes.py	690	0644	edit dl rm
_asyncbackend.py	2360	0644	edit dl rm
_asyncio_backend.py	8971	0644	edit dl rm
_ddr.py	5247	0644	edit dl rm
_features.py	2384	0644	edit dl rm
_immutable_ctx.py	2459	0644	edit dl rm
__init__.py	1663	0644	edit dl rm

Edit: /usr/lib/python3.9/site-packages/dns/_immutable_ctx.py (2459B)

# 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

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