What’s New in Abmarl
Abmarl version 0.2.5 features a new set of built-in Attack Actors for the Grid World Simulation Framework; an exclusive channel action wrapper to allow users to isolate actions by channel; and an enahanced FlattenWrapper for dealing with Discrete spaces.
New Attack Actors
Abmarl’s Grid World Simulation Framework now provides four built-in
Attack Actors for greater flexibility in processing
attacks. In addition to the already-supported BinaryAttackActor,
Abmarl now supports an EncodingBasedAttackActor,
a SelectiveAttackActor, and a
These attackors allow agents to specify attacks based on encodings and cells.
AttackingAgents can now use multiple
attacks per turn, up to their
attack_count, as interpreted by the Attack Actors.
In addition, Attack Actors now output the attack status along with a list of attacked agents, allowing simulations to distinguish and issue rewards among three outcomes:
No attack attempted
Attack attempted and failed
Attack attempted and successful
Exclusive Channel Action Wrapper
Users can enforce exclusivity of actions among the channels within a single Actor, so that the agent must pick from one channel or the other. For example, the ExclusiveChannelActionWrapper can be used with the EncodingBasedAttackActor for AttackingAgents to focus their attack on a specific encoding.
Enhanced Flatten Wrapper
Sampling from a flattened space can result in
unexpected results when the sample
is later unflattened because the sampling distribution in the flattened space is
not the same as in the unflattened space. This is particularly important for Discrete
spaces, which are typically flattened as one-hot-encodings. To overcome these issues,
Abmarl’s FlattenWrapper now flattens Discrete spaces as
an integer-Box of a single element with bounds up to
Easier-to-Read Grid Loading
When loading the grid from a file, empty spaces were previously represented as zeros. This made the file difficult for humans to read because the entities of concern were hard to locate. Now, empty spaces can be zeros, dots, or underscores. Here is a comparison:
# Zeros 0 0 0 0 W 0 W W 0 W W 0 0 W W 0 W 0 W 0 W 0 N 0 0 0 0 0 W 0 W W 0 0 0 0 W W W W 0 W W 0 W 0 0 0 0 W W 0 W W 0 W 0 0 0 W W 0 W 0 W W 0 0 0 0 0 0 0 0 0 W 0 0 W W W 0 W 0 0 W 0 W W 0 W W W W 0 W W W W W W W 0 W 0 T W 0 0 0 0 0 0 W 0 0 0 0 0 0 0 W 0 W W 0 0 W 0 W 0 W W W 0 W W 0 W W 0 W 0 0 # Underscores _ _ _ _ W _ W W _ W W _ _ W W _ W _ W _ W _ N _ _ _ _ _ W _ W W _ _ _ _ W W W W _ W W _ W _ _ _ _ W W _ W W _ W _ _ _ W W _ W _ W W _ _ _ _ _ _ _ _ _ W _ _ W W W _ W _ _ W _ W W _ W W W W _ W W W W W W W _ W _ T W _ _ _ _ _ _ W _ _ _ _ _ _ _ W _ W W _ _ W _ W _ W W W _ W W _ W W _ W _ _ # Dots . . . . W . W W . W W . . W W . W . W . W . N . . . . . W . W W . . . . W W W W . W W . W . . . . W W . W W . W . . . W W . W . W W . . . . . . . . . W . . W W W . W . . W . W W . W W W W . W W W W W W W . W . T W . . . . . . W . . . . . . . W . W W . . W . W . W W W . W W . W W . W . .
local_dirparameter in the configuration files will create a directory for the output files so that they are located under
<local_dir>/abmarl_results/. This behavior is consistente between the trainer and debugger. If no parameter is specified, Abmarl uses the home directory.
activeproperty can be now directly set, giving components better control over the “done-state” of an agent.
Component Wrappers now wrap the null observation and null action of the agents in their underlying components.
Abmarl supports ray version 2.0.