fixing missing variable when verbose=True

Author: bknueven

Diff for: mpisppy/opt/subgradient.py

@@ -8,11 +8,12 @@
 ###############################################################################
 
 import mpisppy.phbase
-import shutil
 import mpisppy.MPI as mpi
 
 from pyomo.common.collections import ComponentSet
 
+_global_rank = mpi.COMM_WORLD.Get_rank()
+
 class Subgradient(mpisppy.phbase.PHBase):
     """ Subgradient Algorithm """
 
@@ -46,11 +47,11 @@ def subgradient_main(self, finalize=True):
         self.PH_Prep(attach_prox=False, attach_smooth=smoothed)
 
         if (verbose):
-            print('Calling Subgradient Iter0 on global rank {}'.format(global_rank))
+            print('Calling Subgradient Iter0 on global rank {}'.format(_global_rank))
         trivial_bound = self.Iter0()
         self.best_bound_obj_val = trivial_bound
         if (verbose):
-            print ('Completed Subgradient Iter0 on global rank {}'.format(global_rank))
+            print('Completed Subgradient Iter0 on global rank {}'.format(_global_rank))
 
         self.iterk_loop()