ewokscore.variable.MutableVariableContainer#

class ewokscore.variable.MutableVariableContainer(value=<MISSING_DATA>, varinfo=None, data_uri=None, data_proxy=None, pre_uhash=None, instance_nonce=None)[source]#

Bases: VariableContainer, MutableMapping

An mutable mapping of variable identifiers (str or int) to variables (Variable).

Parameters:

value (Any)
varinfo (Optional[dict])
data_uri (Optional[DataUri])
data_proxy (Optional[DataProxy])
pre_uhash (Union[str, bytes, UniversalHash, HasUhash, None])
instance_nonce (Optional[Any])

MISSING_DATA = <MISSING_DATA>#

classmethod class_nonce()#

classmethod class_nonce_data()#

cleanup_references()#: Remove all references to other hashables. Side effect: fixes the uhash when it depends on another hashable.

clear() → None. Remove all items from D.#

property container_has_persistent_value#

property container_has_runtime_value#

property container_has_value#

copy_without_references()#: The uhash of the copy is fixed thereby remove references to other uhashable objects.

property data_proxy: DataProxy | None#

property data_uri: DataUri | None#

deserialize(data)#

Deserialize data after loading from persistent storage

Parameters:: data (dict)

dump()#

From runtime to persistent value (never overwrite). Creating the persistent value needs to be atomic.

This silently returns when: - data persistence is disabled - already persisted - data does not have a runtime value (MISSING_DATA) - non value URI can be constructed

fix_uhash()#: Fix the uhash when it is derived from the uhash data.

force_non_existing()#

get(k[, d]) → D[k] if k in D, else d. d defaults to None.#

get_named_variable_values()#

get_positional_variable_values()#

get_uhash_init(serialize=False)#

get_variable_data_proxies()#

get_variable_transfer_data()#: Transfer data by variable or URI

get_variable_uhashes()#

get_variable_uris()#

get_variable_values()#

property has_persistent_value#

property has_runtime_value#

property has_value#

property hashing_enabled#

instance_nonce()#

is_missing()#

Return type:: bool

items() → a set-like object providing a view on D's items#

keys() → a set-like object providing a view on D's keys#

load(raise_error=True)#

From persistent to runtime value. This is called when try to get the value (lazy loading).

This silently returns when: - data persistence is disabled - uri is None (i.e. uhash is None) - raise_error=False

property metadata: dict#

property n_positional_variables#

property named_variable_values#: DEPRECATED

pop(k[, d]) → v, remove specified key and return the corresponding value.#: If key is not found, d is returned if given, otherwise KeyError is raised.

popitem() → (k, v), remove and return some (key, value) pair#: as a 2-tuple; but raise KeyError if D is empty.

property positional_variable_values#: DEPRECATED

reset()#

Reset all variables to ‘MISSING_DATA’

Return type:: None

serialize()#: Serialize data before persistent storage

set_uhash_init(pre_uhash=None, instance_nonce=None)#

Parameters:

pre_uhash (Union[str, bytes, UniversalHash, HasUhash, None])
instance_nonce (Optional[Any])

setdefault(k[, d]) → D.get(k,d), also set D[k]=d if k not in D#

property uhash: UniversalHash | None#

uhash_randomize()#

undo_fix_uhash()#

undo_randomize()#

update([E, ]**F) → None. Update D from mapping/iterable E and F.#: If E present and has a .keys() method, does: for k in E: D[k] = E[k] If E present and lacks .keys() method, does: for (k, v) in E: D[k] = v In either case, this is followed by: for k, v in F.items(): D[k] = v

update_values(items)[source]#

property value#

values() → an object providing a view on D's values#

property variable_data_proxies#: DEPRECATED

property variable_transfer_data#: DEPRECATED

property variable_uhashes#: DEPRECATED

property variable_uris#: DEPRECATED

property variable_values#: DEPRECATED