Merge branch 'fix_slsqp_warning' into 'master'

closes #2

Closes #2

See merge request !10

topfarm/topfarm.py

@@ -5,6 +5,7 @@ from openmdao.api import Problem, ScipyOptimizeDriver, IndepVarComp
 import numpy as np
 from topfarm.constraint_components.boundary_component import BoundaryComp
 from topfarm.constraint_components.spacing_component import SpacingComp
+import warnings
 
 
 class TopFarm(object):
@@ -67,7 +68,9 @@ class TopFarm(object):
 
     def evaluate(self):
         t = time.time()
-        self.problem.run_model()
+        with warnings.catch_warnings():  # suppress OpenMDAO/SLSQP warnings
+            warnings.filterwarnings('ignore', "Inefficient choice of derivative mode.  You chose 'rev' for a problem with")
+            self.problem.run_model()
         print ("Evaluated in\t%.3fs" % (time.time() - t))
         return self.get_cost(), self.turbine_positions