Adding same change to mpi.py per request

Author: jeinstei

rsopt/mpi.py

@@ -1,7 +1,8 @@
 
 def get_mpi_environment():
     try:
-        from mpi4py import MPI
+        import mpi4py
+        mpi4py.rc.initialize = False
     except ModuleNotFoundError:
         # mpi4py not installed so it can't be used
         return
@@ -11,8 +12,10 @@ def get_mpi_environment():
         # (if user did start MPI with size 1 this would be an illegal configuration since: main + 1 worker = 2 ranks)
         return
 
+    from mpi4py import MPI
+    MPI.Init()
     nworkers = MPI.COMM_WORLD.Get_size() - 1
     is_manager = MPI.COMM_WORLD.Get_rank() == 0
     mpi_environment = {'mpi_comm': MPI.COMM_WORLD, 'comms': 'mpi', 'nworkers': nworkers, 'is_manager': is_manager}
 
-    return mpi_environment
+    return mpi_environment