Update.

diff --git a/grids.py b/grids.py
index 19b9ce4..9b1ed50 100755 (executable)
--- a/grids.py
+++ b/grids.py
@@ -167,7 +167,7 @@ class Grids(problem.Problem):
         self.check_structure(quizzes, struct)
         return struct
 
-    def inject_noise(self, quizzes, noise, struct=None, mask=None):
+    def inject_noise(self, quizzes, noise):  # , struct=None, mask=None):
         # assert self.check_structure(quizzes, struct=struct)
         S = self.height * self.width