Add tutorial models

examples/tutorial_classic/trafficlight.py

@@ -0,0 +1,48 @@
+from pypdevs.DEVS import *
+from pypdevs.infinity import INFINITY
+
+class TrafficLight(AtomicDEVS):
+    def __init__(self):
+        AtomicDEVS.__init__(self, "Light")
+        self.state = "green"
+        self.elapsed = 0.0
+        self.observe = self.addOutPort("observer")
+        self.interrupt = self.addInPort("interrupt")
+
+    def intTransition(self):
+        state = self.state
+        return {"red": "green",
+                "yellow": "red",
+                "green": "yellow",
+                "going_manual": "manual",
+                "going_auto": "red"}[state]
+
+    def timeAdvance(self):
+        state = self.state
+        return {"red": 60,
+                "yellow": 3,
+                "green": 57,
+                "manual": INFINITY,
+                "going_manual": 0,
+                "going_auto": 0}[state]
+
+    def outputFnc(self):
+        state = self.state
+        if state == "red":
+            return {self.observe: "show_green"}
+        elif state == "yellow":
+            return {self.observe: "show_red"}
+        elif state == "green":
+            return {self.observe: "show_yellow"}
+        elif state == "going_manual":
+            return {self.observe: "turn_off"}
+        elif state == "going_auto":
+            return {self.observe: "show_red"}
+
+    def extTransition(self, inputs):
+        inp = inputs[self.interrupt]
+        if inp == "toManual":
+            return "going_manual"
+        elif inp == "toAuto":
+            if self.state == "manual":
+                return "going_auto"