From c8761b97aa05a6bbc0dc2c25df922d0cee0abffe Mon Sep 17 00:00:00 2001
From: Stephan Seitz <stephan.seitz@fau.de>
Date: Tue, 6 Aug 2019 18:33:10 +0200
Subject: [PATCH] Fix AutoDiffOp.__hash__

---
 src/pystencils_autodiff/autodiff.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/pystencils_autodiff/autodiff.py b/src/pystencils_autodiff/autodiff.py
index 54c38d2..e167b27 100644
--- a/src/pystencils_autodiff/autodiff.py
+++ b/src/pystencils_autodiff/autodiff.py
@@ -99,7 +99,7 @@ Backward:
                 raise NotImplementedError()
 
     def __hash__(self):
-        return hash(self.forward_assignments, self.backward_assignments)
+        return hash((self.forward_assignments, self.backward_assignments))
 
     def __repr__(self):
         return self._REPR_TEMPLATE.render(forward_assignments=str(self.forward_assignments),
-- 
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