gh-104683: Argument clinic: cleanup `state_modulename_name()` (#107340)

1 files changed, 9 insertions, 10 deletions

diff --git a/Tools/clinic/clinic.py b/Tools/clinic/clinic.py
index 5d3ed41..a343dc5 100755
--- a/Tools/clinic/clinic.py
+++ b/Tools/clinic/clinic.py
@@ -4730,6 +4730,7 @@ class DSLParser:
                 return
 
         line, _, returns = line.partition('->')
+        returns = returns.strip()
 
         full_name, _, c_basename = line.partition(' as ')
         full_name = full_name.strip()
@@ -4743,23 +4744,21 @@ class DSLParser:
         return_converter = None
         if returns:
             ast_input = f"def x() -> {returns}: pass"
-            module = None
             try:
-                module = ast.parse(ast_input)
+                module_node = ast.parse(ast_input)
             except SyntaxError:
-                pass
-            if not module:
-                fail("Badly-formed annotation for " + full_name + ": " + returns)
+                fail(f"Badly formed annotation for {full_name}: {returns!r}")
+            function_node = module_node.body[0]
+            assert isinstance(function_node, ast.FunctionDef)
             try:
-                name, legacy, kwargs = self.parse_converter(module.body[0].returns)
+                name, legacy, kwargs = self.parse_converter(function_node.returns)
                 if legacy:
-                    fail("Legacy converter {!r} not allowed as a return converter"
-                         .format(name))
+                    fail(f"Legacy converter {name!r} not allowed as a return converter")
                 if name not in return_converters:
-                    fail("No available return converter called " + repr(name))
+                    fail(f"No available return converter called {name!r}")
                 return_converter = return_converters[name](**kwargs)
             except ValueError:
-                fail("Badly-formed annotation for " + full_name + ": " + returns)
+                fail(f"Badly formed annotation for {full_name}: {returns!r}")
 
         fields = [x.strip() for x in full_name.split('.')]
         function_name = fields.pop()