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from __future__ import annotations
from itertools import repeat
from .._internal import _missing
def is_immutable(self):
raise TypeError(f"{type(self).__name__!r} objects are immutable")
class ImmutableListMixin:
"""Makes a :class:`list` immutable.
.. versionadded:: 0.5
:private:
"""
_hash_cache = None
def __hash__(self):
if self._hash_cache is not None:
return self._hash_cache
rv = self._hash_cache = hash(tuple(self))
return rv
def __reduce_ex__(self, protocol):
return type(self), (list(self),)
def __delitem__(self, key):
is_immutable(self)
def __iadd__(self, other):
is_immutable(self)
def __imul__(self, other):
is_immutable(self)
def __setitem__(self, key, value):
is_immutable(self)
def append(self, item):
is_immutable(self)
def remove(self, item):
is_immutable(self)
def extend(self, iterable):
is_immutable(self)
def insert(self, pos, value):
is_immutable(self)
def pop(self, index=-1):
is_immutable(self)
def reverse(self):
is_immutable(self)
def sort(self, key=None, reverse=False):
is_immutable(self)
class ImmutableDictMixin:
"""Makes a :class:`dict` immutable.
.. versionadded:: 0.5
:private:
"""
_hash_cache = None
@classmethod
def fromkeys(cls, keys, value=None):
instance = super().__new__(cls)
instance.__init__(zip(keys, repeat(value)))
return instance
def __reduce_ex__(self, protocol):
return type(self), (dict(self),)
def _iter_hashitems(self):
return self.items()
def __hash__(self):
if self._hash_cache is not None:
return self._hash_cache
rv = self._hash_cache = hash(frozenset(self._iter_hashitems()))
return rv
def setdefault(self, key, default=None):
is_immutable(self)
def update(self, *args, **kwargs):
is_immutable(self)
def pop(self, key, default=None):
is_immutable(self)
def popitem(self):
is_immutable(self)
def __setitem__(self, key, value):
is_immutable(self)
def __delitem__(self, key):
is_immutable(self)
def clear(self):
is_immutable(self)
class ImmutableMultiDictMixin(ImmutableDictMixin):
"""Makes a :class:`MultiDict` immutable.
.. versionadded:: 0.5
:private:
"""
def __reduce_ex__(self, protocol):
return type(self), (list(self.items(multi=True)),)
def _iter_hashitems(self):
return self.items(multi=True)
def add(self, key, value):
is_immutable(self)
def popitemlist(self):
is_immutable(self)
def poplist(self, key):
is_immutable(self)
def setlist(self, key, new_list):
is_immutable(self)
def setlistdefault(self, key, default_list=None):
is_immutable(self)
class ImmutableHeadersMixin:
"""Makes a :class:`Headers` immutable. We do not mark them as
hashable though since the only usecase for this datastructure
in Werkzeug is a view on a mutable structure.
.. versionadded:: 0.5
:private:
"""
def __delitem__(self, key, **kwargs):
is_immutable(self)
def __setitem__(self, key, value):
is_immutable(self)
def set(self, _key, _value, **kwargs):
is_immutable(self)
def setlist(self, key, values):
is_immutable(self)
def add(self, _key, _value, **kwargs):
is_immutable(self)
def add_header(self, _key, _value, **_kwargs):
is_immutable(self)
def remove(self, key):
is_immutable(self)
def extend(self, *args, **kwargs):
is_immutable(self)
def update(self, *args, **kwargs):
is_immutable(self)
def insert(self, pos, value):
is_immutable(self)
def pop(self, key=None, default=_missing):
is_immutable(self)
def popitem(self):
is_immutable(self)
def setdefault(self, key, default):
is_immutable(self)
def setlistdefault(self, key, default):
is_immutable(self)
def _calls_update(name):
def oncall(self, *args, **kw):
rv = getattr(super(UpdateDictMixin, self), name)(*args, **kw)
if self.on_update is not None:
self.on_update(self)
return rv
oncall.__name__ = name
return oncall
class UpdateDictMixin(dict):
"""Makes dicts call `self.on_update` on modifications.
.. versionadded:: 0.5
:private:
"""
on_update = None
def setdefault(self, key, default=None):
modified = key not in self
rv = super().setdefault(key, default)
if modified and self.on_update is not None:
self.on_update(self)
return rv
def pop(self, key, default=_missing):
modified = key in self
if default is _missing:
rv = super().pop(key)
else:
rv = super().pop(key, default)
if modified and self.on_update is not None:
self.on_update(self)
return rv
__setitem__ = _calls_update("__setitem__")
__delitem__ = _calls_update("__delitem__")
clear = _calls_update("clear")
popitem = _calls_update("popitem")
update = _calls_update("update")
|
