i think it is working

econ/agents/base_agent.py

@@ -1,5 +1,17 @@
-class BaseAgent():
-    def tick():
+import uuid 
+from abc import ABC
+class BaseAgent(ABC):
+    _bal="balance"
+    def __init__(self,simulation) -> None:
+        """
+        Base class of an agent.
+        Simulation: to register tick method at.
+        """
+        self.id=uuid.uuid4()
+        self.simulation=simulation
+        simulation.register_tick(self.id,self.tick)
+        pass
+    def tick(self):
         """
         Tick method for simulation to call to execute selected action
         """