Update.

diff --git a/main.py b/main.py
index 5537965..30dcd4d 100755 (executable)
--- a/main.py
+++ b/main.py
@@ -222,7 +222,7 @@ assert args.nb_train_samples % args.batch_size == 0
 assert args.nb_test_samples % args.batch_size == 0
 
 if args.problem == "sky":
-    problem = (sky.Sky(height=6, width=8, nb_birds=3, nb_iterations=2, speed=2),)
+    problem = sky.Sky(height=6, width=8, nb_birds=3, nb_iterations=2, speed=2)
 elif args.problem == "wireworld":
     problem = wireworld.Wireworld(height=10, width=15, nb_iterations=4)
 else: