diff --git a/mcpyrate/unparser.py b/mcpyrate/unparser.py
index 2b607dc..c5f4d0f 100644
--- a/mcpyrate/unparser.py
+++ b/mcpyrate/unparser.py
@@ -700,7 +700,7 @@ def _IfExp(self, t):
         self.write(")")
 
     def _Set(self, t):
-        assert(t.elts)  # should be at least one element
+        assert t.elts  # should be at least one element
         self.write("{")
         interleave(lambda: self.write(", "), self.dispatch, t.elts)
         self.write("}")