add example: restarting simulation

examples/restarting/main.py

@@ -0,0 +1,48 @@
+from pypdevs.DEVS import AtomicDEVS
+from pypdevs.simulator import Simulator
+import dataclasses
+
+@dataclasses.dataclass
+class AutoCounterState:
+    count: int
+    def __init__(self, count):
+        self.count = count
+
+class AutoCounter(AtomicDEVS):
+    def __init__(self, start):
+        AtomicDEVS.__init__(self, "System")
+        self.state = AutoCounterState(count=start)
+        self.outport = self.addOutPort("outport")
+
+    def timeAdvance(self):
+        return 1.0
+
+    def outputFnc(self):
+        print("outputFnc...", self, self.state)
+        return {self.outport: self.state.count}
+
+    def intTransition(self):
+        return AutoCounterState(self.state.count+1)
+
+
+# Termination condition:
+class StopAt:
+    def __init__(self, stop_at):
+        self.stop_at = stop_at
+    def __call__(self, time, model):
+        return model.state.count >= self.stop_at
+
+if __name__ == "__main__":
+    ctr = AutoCounter(start=0)
+    sim = Simulator(ctr)
+    sim.setClassicDEVS()
+    sim.setVerbose()
+    sim.setTerminationCondition(StopAt(3))
+    sim.simulate()
+
+    ctr2 = AutoCounter(start=ctr.state.count + 10) # we restart at 13
+    sim2 = Simulator(ctr2)
+    sim2.setClassicDEVS()
+    sim2.setVerbose()
+    sim2.setTerminationCondition(StopAt(15))
+    sim2.simulate()