tf_agents.utils.object_identity.ObjectIdentityDictionary

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A mutable mapping data structure which compares using "is".

This is necessary because we have trackable objects (_ListWrapper) which have behavior identical to built-in Python lists (including being unhashable and comparing based on the equality of their contents by default).

Methods

clear

D.clear() -> None. Remove all items from D.

get

Retrieve the corresponding layout by the string key.

When there isn't an exact match, all the existing keys in the layout map will be treated as a regex and map against the input key again. The first match will be returned, based on the key insertion order. Return None if there isn't any match found.

Args
key the string key as the query for the layout.

Returns
Corresponding layout based on the query.

items

D.items() -> a set-like object providing a view on D's items

keys

D.keys() -> a set-like object providing a view on D's keys

pop

D.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

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

setdefault

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

update

D.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

values

D.values() -> an object providing a view on D's values

__contains__

__eq__

Return self==value.

__getitem__

View source

__iter__

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__len__

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