Remove BoundDestination Object

New Variable 'var_can_be_bound'
Observations adjusted accordingly

marl_factory_grid/environment/groups/agents.py

@@ -11,10 +11,6 @@ class Agents(PositionMixin, EnvObjects):
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
 
-    @property
-    def obs_pairs(self):
-        return [(a.name, a) for a in self]
-
     @property
     def action_space(self):
         from gymnasium import spaces

marl_factory_grid/environment/groups/env_objects.py

@@ -9,6 +9,7 @@ class EnvObjects(Objects):
     var_can_collide: bool = False
     var_has_position: bool = False
     var_can_move: bool = False
+    var_can_be_bound: bool = False
 
     @property
     def encodings(self):

marl_factory_grid/environment/groups/mixins.py

@@ -92,11 +92,11 @@ class HasBoundMixin:
     def by_entity(self, entity):
         try:
             return next((x for x in self if x.belongs_to_entity(entity)))
-        except StopIteration:
+        except (StopIteration, AttributeError):
             return None
 
     def idx_by_entity(self, entity):
         try:
             return next((idx for idx, x in enumerate(self) if x.belongs_to_entity(entity)))
-        except StopIteration:
+        except (StopIteration, AttributeError):
             return None

marl_factory_grid/environment/groups/objects.py

@@ -24,7 +24,9 @@ class Objects:
 
     @property
     def obs_pairs(self):
-        return [(self.name, self)]
+        pair_list = [(self.name, self)]
+        pair_list.extend([(a.name, a) for a in self])
+        return pair_list
 
     @property
     def names(self):