bank_reserves/charts: Don't make Bank an Agent

It doesn't have a step function and there is only one, so it shouldn't be an Agent, just an Python object.

examples/bank_reserves/bank_reserves/agents.py

@@ -10,15 +10,12 @@
     Northwestern University, Evanston, IL.
 """
 
-import mesa
-
 from .random_walk import RandomWalker
 
 
-class Bank(mesa.Agent):
-    def __init__(self, unique_id, model, reserve_percent=50):
-        # initialize the parent class with required parameters
-        super().__init__(unique_id, model)
+class Bank:
+    def __init__(self, model, reserve_percent=50):
+        self.model = model
         # for tracking total value of loans outstanding
         self.bank_loans = 0
         """percent of deposits the bank must keep in reserves - this is set via

examples/bank_reserves/bank_reserves/model.py

@@ -136,7 +136,7 @@ def __init__(
         )
 
         # create a single bank for the model
-        self.bank = Bank(1, self, self.reserve_percent)
+        self.bank = Bank(self, self.reserve_percent)
 
         # create people for the model according to number of people set by user
         for i in range(self.init_people):

examples/bank_reserves/batch_run.py

@@ -148,8 +148,8 @@ def __init__(
             agent_reporters={"Wealth": "wealth"},
         )
 
-        # create a single bank for the model
-        self.bank = Bank(1, self, self.reserve_percent)
+        # create a single bank object for the model
+        self.bank = Bank(self, self.reserve_percent)
 
         # create people for the model according to number of people set by user
         for i in range(self.init_people):

examples/charts/charts/agents.py

@@ -10,15 +10,12 @@
     Northwestern University, Evanston, IL.
 """
 
-import mesa
-
 from .random_walk import RandomWalker
 
 
-class Bank(mesa.Agent):
-    def __init__(self, unique_id, model, reserve_percent=50):
-        # initialize the parent class with required parameters
-        super().__init__(unique_id, model)
+class Bank:
+    def __init__(self, model, reserve_percent=50):
+        self.model = model
         # for tracking total value of loans outstanding
         self.bank_loans = 0
         """percent of deposits the bank must keep in reserves - this is set via

examples/charts/charts/model.py

@@ -119,7 +119,7 @@ def __init__(
         )
 
         # create a single bank for the model
-        self.bank = Bank(1, self, self.reserve_percent)
+        self.bank = Bank(self, self.reserve_percent)
 
         # create people for the model according to number of people set by user
         for i in range(self.init_people):