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-rw-r--r--Parser/Python.asdl2
1 files changed, 1 insertions, 1 deletions
diff --git a/Parser/Python.asdl b/Parser/Python.asdl
index db61d8b1f66..96f3914b029 100644
--- a/Parser/Python.asdl
+++ b/Parser/Python.asdl
@@ -63,7 +63,7 @@ module Python
| UnaryOp(unaryop op, expr operand)
| Lambda(arguments args, expr body)
| IfExp(expr test, expr body, expr orelse)
- | Dict(expr* keys, expr* values)
+ | Dict(expr?* keys, expr* values)
| Set(expr* elts)
| ListComp(expr elt, comprehension* generators)
| SetComp(expr elt, comprehension* generators)