Fixing f_gap issue in SingleObjectiveOutput

anyoptimization · Nov 26, 2023 · 26e7e5c · 26e7e5c
1 parent 9107776
commit 26e7e5c
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Showing 2 changed files with 2 additions and 3 deletions.
diff --git a/examples/algorithms/moo/nsga2/nsga2_pcx.py b/examples/algorithms/moo/nsga2/nsga2_pcx.py
@@ -14,7 +14,7 @@
                algorithm,
                ('n_gen', 200),
                seed=1,
-               verbose=False)
+               verbose=True)
 
 plot = Scatter()
 plot.add(problem.pareto_front(), plot_type="line", color="black", alpha=0.7)

diff --git a/pymoo/util/display/single.py b/pymoo/util/display/single.py
@@ -60,9 +60,8 @@ def update(self, algorithm):
 
         if opt.feas:
             self.f_min.set(opt.f)
-            if self.best:
+            if self.best is not None:
                 self.f_gap.set(opt.f - self.best)
-
         else:
             self.f_min.set(None)
             self.f_gap.set(None)