Update SugarscapeG1mt for automatic time advancement

Author: EwoutH

examples/sugarscape_g1mt/sugarscape_g1mt/model.py

@@ -150,7 +150,6 @@ def step(self):
 
         if not self.enable_trade:
             # If trade is not enabled, return early
-            self._steps += 1
             self.datacollector.collect(self)
             return
 
@@ -159,7 +158,6 @@ def step(self):
         for agent in trader_shuffle:
             agent.trade_with_neighbors()
 
-        self._steps += 1
         # collect model level data
         self.datacollector.collect(self)
         """
@@ -175,11 +173,11 @@ def step(self):
         """
         # Need to remove excess data
         # Create local variable to store trade data
-        agent_trades = self.datacollector._agent_records[self._steps]
+        agent_trades = self.datacollector._agent_records[self.steps]
         # Get rid of all None to reduce data storage needs
         agent_trades = [agent for agent in agent_trades if agent[2] is not None]
         # Reassign the dictionary value with lean trade data
-        self.datacollector._agent_records[self._steps] = agent_trades
+        self.datacollector._agent_records[self.steps] = agent_trades
 
     def run_model(self, step_count=1000):
         for i in range(step_count):