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_oldOrjsonDumps = None
_oldMutableMappingSubclasshook = None
class MonkeypatchWarning(UserWarning):
pass
def checkCExtension(*, warn, warn_c = False):
import frozendict as cool
res = cool.c_ext
if warn and res == warn_c:
if warn_c: # pragma: no cover
msg = "C Extension version, monkeypatch will be not applied"
else:
msg = "Pure Python version, monkeypatch will be not applied"
import warnings
warnings.warn(msg, MonkeypatchWarning)
return res
def patchOrUnpatchJson(*, patch, warn = True): # pragma: no cover
if not checkCExtension(warn = warn):
return
from importlib import import_module
self = import_module(__name__)
import frozendict as cool
import json
OldJsonEncoder = self._OldJsonEncoder
# noinspection PyUnresolvedReferences, PyProtectedMember
FrozendictJsonEncoder = cool._getFrozendictJsonEncoder(
OldJsonEncoder
)
if patch:
DefaultJsonEncoder = FrozendictJsonEncoder
else:
DefaultJsonEncoder = OldJsonEncoder
if DefaultJsonEncoder is None:
default_json_encoder = None
else:
default_json_encoder = DefaultJsonEncoder(
skipkeys = False,
ensure_ascii = True,
check_circular = True,
allow_nan = True,
indent = None,
separators = None,
default = None,
)
if patch:
if OldJsonEncoder is None:
self._OldJsonEncoder = json.encoder.JSONEncoder
else:
if OldJsonEncoder is None:
raise ValueError(
"Old json encoder is None " +
"(maybe you already unpatched json?)"
)
self._OldJsonEncoder = None
cool.FrozendictJsonEncoder = FrozendictJsonEncoder
json.JSONEncoder = DefaultJsonEncoder
json.encoder.JSONEncoder = DefaultJsonEncoder
json._default_encoder = default_json_encoder
def patchOrUnpatchOrjson(*, patch, warn = True): # pragma: no cover
if not checkCExtension(warn = warn):
return
from importlib import import_module
self = import_module(__name__)
# noinspection PyUnresolvedReferences
import orjson
if self._oldOrjsonDumps is None:
if not patch:
raise ValueError(
"Old orjson encoder is None " +
"(maybe you already unpatched orjson?)"
)
oldOrjsonDumps = orjson.dumps
else:
oldOrjsonDumps = self._oldOrjsonDumps
if patch:
from frozendict import frozendict
def frozendictOrjsonDumps(obj, *args, **kwargs):
if isinstance(obj, frozendict):
obj = dict(obj)
return oldOrjsonDumps(obj, *args, **kwargs)
defaultOrjsonDumps = frozendictOrjsonDumps
newOldOrjsonDumps = oldOrjsonDumps
else:
defaultOrjsonDumps = oldOrjsonDumps
newOldOrjsonDumps = None
self._oldOrjsonDumps = newOldOrjsonDumps
orjson.dumps = defaultOrjsonDumps
orjson.orjson.dumps = defaultOrjsonDumps
def patchOrUnpatchMutableMappingSubclasshook(
*,
patch,
warn = True
): # pragma: no cover
warn_c = True
if checkCExtension(warn = warn, warn_c = warn_c):
return
from importlib import import_module
self = import_module(__name__)
from collections.abc import MutableMapping
from frozendict import frozendict
if self._oldMutableMappingSubclasshook is None:
if not patch:
raise ValueError(
"Old MutableMapping subclasshook is None " +
"(maybe you already unpatched MutableMapping?)"
)
oldMutableMappingSubclasshook = MutableMapping.__subclasshook__
else:
oldMutableMappingSubclasshook = self._oldMutableMappingSubclasshook
if patch:
# noinspection PyDecorator
@classmethod
def frozendictMutableMappingSubclasshook(
klass,
subclass,
*args,
**kwargs
):
if klass == MutableMapping:
if issubclass(subclass, frozendict):
return False
return oldMutableMappingSubclasshook(
subclass,
*args,
**kwargs
)
return NotImplemented
defaultMutableMappingSubclasshook = frozendictMutableMappingSubclasshook
newOldMutableMappingSubclasshook = oldMutableMappingSubclasshook
else:
defaultMutableMappingSubclasshook = oldMutableMappingSubclasshook
newOldMutableMappingSubclasshook = None
self._oldMutableMappingSubclasshook = newOldMutableMappingSubclasshook
MutableMapping.__subclasshook__ = defaultMutableMappingSubclasshook
try:
# noinspection PyUnresolvedReferences, PyProtectedMember
MutableMapping._abc_caches_clear()
except AttributeError:
# noinspection PyUnresolvedReferences, PyProtectedMember
MutableMapping._abc_cache.discard(frozendict)
# noinspection PyUnresolvedReferences, PyProtectedMember
MutableMapping._abc_negative_cache.discard(frozendict)
def patchOrUnpatchAll(*, patch, warn = True, raise_orjson = False):
patchOrUnpatchJson(patch = patch, warn = warn)
try:
import orjson
except ImportError: # pragma: no cover
if raise_orjson:
raise
else: # pragma: no cover
patchOrUnpatchOrjson(patch = patch, warn = warn)
patchOrUnpatchMutableMappingSubclasshook(patch = patch, warn = warn)
__all__ = (
patchOrUnpatchJson.__name__,
patchOrUnpatchOrjson.__name__,
patchOrUnpatchMutableMappingSubclasshook.__name__,
patchOrUnpatchAll.__name__,
MonkeypatchWarning.__name__,
)
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