minor fixes for tests

mesa_frames/abstract/agents.py

@@ -8,11 +8,11 @@
 from numpy.random import Generator
 
 from mesa_frames.abstract.mixin import CopyMixin
-from mesa_frames.concrete.model import ModelDF
 from mesa_frames.types import BoolSeries, DataFrame, IdsLike, Index, MaskLike, Series
 
 if TYPE_CHECKING:
     from mesa_frames.concrete.agents import AgentSetDF
+    from mesa_frames.concrete.model import ModelDF
 
 
 class AgentContainer(CopyMixin):

mesa_frames/concrete/agentset_pandas.py

@@ -303,14 +303,13 @@ def _concatenate_agentsets(
         else:
             final_df = pd.concat([obj._agents for obj in agentsets])
             final_mask = pd.concat([obj._mask for obj in agentsets])
-        new_obj = self._get_obj(inplace=False)
-        new_obj._agents = final_df
-        new_obj._mask = final_mask
+        self._agents = final_df
+        self._mask = final_mask
         if not isinstance(original_masked_index, type(None)):
             ids_to_remove = original_masked_index.difference(self._agents.index)
             if not ids_to_remove.empty:
-                new_obj.remove(ids_to_remove, inplace=True)
-        return new_obj
+                self.remove(ids_to_remove, inplace=True)
+        return self
 
     def _get_bool_mask(
         self,
@@ -390,12 +389,19 @@ def _update_mask(
         new_active_indices: pd.Index | None = None,
     ) -> None:
         # Update the mask with the old active agents and the new agents
-        self._mask = pd.Series(
-            self._agents.index.isin(original_active_indices)
-            | self._agents.index.isin(new_active_indices),
-            index=self._agents.index,
-            dtype=pd.BooleanDtype(),
-        )
+        if new_active_indices is None:
+            self._mask = pd.Series(
+                self._agents.index.isin(original_active_indices),
+                index=self._agents.index,
+                dtype=pd.BooleanDtype(),
+            )
+        else:
+            self._mask = pd.Series(
+                self._agents.index.isin(original_active_indices)
+                | self._agents.index.isin(new_active_indices),
+                index=self._agents.index,
+                dtype=pd.BooleanDtype(),
+            )
 
     def __getattr__(self, name: str) -> Any:
         super().__getattr__(name)

mesa_frames/concrete/agentset_polars.py

@@ -4,7 +4,7 @@
 import polars as pl
 from polars.type_aliases import IntoExpr
 
-from mesa_frames import AgentSetDF
+from mesa_frames.concrete.agents import AgentSetDF
 from mesa_frames.types import PolarsIdsLike, PolarsMaskLike
 
 if TYPE_CHECKING:
@@ -209,7 +209,7 @@ def remove(self, ids: PolarsIdsLike, inplace: bool = True) -> Self:
         if len(obj._agents) == initial_len:
             raise KeyError(f"IDs {ids} not found in agent set.")
 
-        if isinstance(obj.mask, pl.Series):
+        if isinstance(obj._mask, pl.Series):
             obj._update_mask(original_active_indices)
         return obj
 

mesa_frames/concrete/model.py

@@ -1,11 +1,13 @@
 from collections.abc import Sequence
-from typing import Any
+from typing import TYPE_CHECKING, Any
 
 import numpy as np
 
-from mesa_frames.abstract.agents import AgentSetDF
 from mesa_frames.concrete.agents import AgentsDF
 
+if TYPE_CHECKING:
+    from mesa_frames.abstract.agents import AgentSetDF
+
 
 class ModelDF:
     """Base class for models in the mesa-frames library.
@@ -75,7 +77,7 @@ def __init__(self, *args: Any, **kwargs: Any) -> None:
         self.current_id = 0
         self._agents = AgentsDF()
 
-    def get_agents_of_type(self, agent_type: type) -> AgentSetDF:
+    def get_agents_of_type(self, agent_type: type) -> "AgentSetDF":
         """Retrieve the AgentSetDF of a specified type.
 
         Parameters

tests/test_agentset_polars.py

@@ -46,7 +46,7 @@ def test__init__(self):
         assert agents.model == model
         assert isinstance(agents.agents, pl.DataFrame)
         assert agents.agents["unique_id"].to_list() == [0, 1, 2, 3]
-        assert isinstance(agents._mask, pl.Expr)
+        assert isinstance(agents._mask, pl.Series)
         assert isinstance(agents.random, Generator)
         assert agents.starting_wealth.to_list() == [1, 2, 3, 4]