Added doc to simulation __init__

sw/utility/simulation/__init__.py

@@ -1,2 +1,77 @@
+"""Simulation package.
+
+This package provides a way to easily define simulations in such a way that
+they can be paused and resumed.
+
+General Structure
+=================
+The package consists of 3 main components:
+  - The 'SimulationDeSerializer': Responsible for file IO
+  - The 'Simulator': Responsible for the actual simulating
+  - The 'SimulationManager': Delegates work to the DeSerializer and the
+    Simulator
+
+The Simulator Class
+===================
+For each new simulating task, a new 'Simulator' must be defined. The
+requirements for this class are the following:
+  - Must define the 'start_or_continue()', 'stop()' and
+    'get_current_results()' functions
+  - Must be picklable in order to store the simulation state
+
+An example simulator could look as follows:
+----------------------------------------------------------------
+class SomeSimulator:
+    def __init__(self, num_iterations):
+        self._num_iterations = num_iterations
+        self._current_iter = 0
+
+        self._simulation_running = False
+
+        self._results = pd.DataFrame()
+
+    def _perform_iteration(self):
+        # Perform iteration and append results
+        ...
+
+    def start_or_continue(self) -> None:
+        self._simulation_running = True
+
+        while self._simulation_running and (
+                self._current_iter < self._num_iterations):
+            self._perform_iteration()
+
+    def stop(self) -> None:
+        self._simulation_running = False
+
+    def get_current_results(self) -> pd.DataFrame:
+        return self._results
+----------------------------------------------------------------
+
+Usage
+=====
+To start a new simulation:
+----------------------------------------------------------------
+sim_mgr = SimulationManager(results_dir="results", saves_dir="saves")
+
+sim = SomeSimulator(num_iterations=100)
+sim_mgr.configure_simulation(simulator=sim, name='Some Simulation', \
+                             column_labels=['label1', 'label2'])
+sim_mgr.start()
+----------------------------------------------------------------
+
+To check for a previously interrupted simulation and continue:
+----------------------------------------------------------------
+sim_mgr = SimulationManager(results_dir="results", saves_dir="saves")
+
+unfinished_sims = sim_mgr.get_unfinished()
+
+if len(unfinished_sims) > 0:
+    sim_mgr.load_unfinished(unfinished_sims[0])
+    sim_mgr.simulate()
+----------------------------------------------------------------
+"""
+
+
 from utility.simulation.management import SimulationManager, \
     SimulationDeSerializer