bpo-38870: Implement support for ast.FunctionType in ast.unparse (GH-19016)

1 files changed, 9 insertions, 0 deletions

diff --git a/Lib/ast.py b/Lib/ast.py
index 077eb92..e347d8b 100644
--- a/Lib/ast.py
+++ b/Lib/ast.py
@@ -741,6 +741,15 @@ class _Unparser(NodeVisitor):
     def visit_Module(self, node):
         self._write_docstring_and_traverse_body(node)
 
+    def visit_FunctionType(self, node):
+        with self.delimit("(", ")"):
+            self.interleave(
+                lambda: self.write(", "), self.traverse, node.argtypes
+            )
+
+        self.write(" -> ")
+        self.traverse(node.returns)
+
     def visit_Expr(self, node):
         self.fill()
         self.set_precedence(_Precedence.YIELD, node.value)