wait and work

Author: gvwilson

requirements.txt

@@ -3,6 +3,7 @@ greenlet
 kaleido
 pandas
 plotly
+py-des-lib
 pydot
 pyfakefs
 pytest

src/eventsim/Makefile

@@ -0,0 +1,4 @@
+TARGETS=\
+  wait_and_work.out
+
+include ../../examples.mk

src/eventsim/index.md

@@ -1,9 +1,12 @@
 ---
-title: "Discrete Event Simulator"
+title: "Discrete Event Simulation"
 abstract: >
     FIXME
 syllabus:
 -   FIXME
 ---
 
 [%fixme "create discrete event simulator" %] [%issue 56 %]
+
+-   Basic ideas of discrete event simulation
+-   `wait_and_work.py`: work a fixed time, wait a fixed time

src/eventsim/wait_and_work.out

@@ -0,0 +1,4 @@
+start to work at 0
+start to work at 5
+start to work at 10
+finished working at 15

src/eventsim/wait_and_work.py

@@ -0,0 +1,26 @@
+from pydes import Component, Simulator
+
+
+class Worker(Component):
+    NUM_STEPS = 3
+    WORK_TIME = 5
+
+    def __init__(self, sim):
+        self._sim = sim
+
+    def main(self):
+        for i in range(self.NUM_STEPS):
+            print(f"start to work at {self._sim.now()}")
+            self._sim.sleep(self.WORK_TIME)
+        print(f"finished working at {self._sim.now()}")
+
+
+def simulate():
+    sim = Simulator()
+    worker = Worker(sim)
+    sim.schedule(worker)
+    sim.run()
+
+
+if __name__ == "__main__":
+    simulate()