Pyro.run_sim() should not return the simulation object (#232)

add an explicit get method to get it

Author: zingale

pyro/pyro_sim.py

@@ -196,8 +196,6 @@ def run_sim(self):
 
         self.sim.finalize()
 
-        return self.sim
-
     def single_step(self):
         """
         Do a single step
@@ -253,9 +251,9 @@ def __repr__(self):
         return s
 
     def get_var(self, v):
-        """
-        Alias for cc_data's get_var routine, returns the cell-centered data
-        given the variable name v.
+        """Alias for the data's get_var routine, returns the
+        simulation data given the variable name v.
+
         """
 
         if not self.is_initialized:
@@ -264,15 +262,19 @@ def get_var(self, v):
         return self.sim.cc_data.get_var(v)
 
     def get_grid(self):
-        """
-        Return the underlying grid object for the simulation
+        """Return the underlying grid object for the simulation
+
         """
 
         if not self.is_initialized:
             msg.fail("ERROR: problem has not been initialized")
 
         return self.sim.cc_data.grid
 
+    def get_sim(self):
+        """Return the Simulation object"""
+        return self.sim
+
 
 class PyroBenchmark(Pyro):
     """