fix init.py bug (#364)

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# Content

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Author: bagel897

src/codegen/sdk/python/file.py

@@ -187,7 +187,7 @@ def valid_import_names(self) -> dict[str, PySymbol | PyImport | WildcardImport[P
         another file.
         """
         if self.name == "__init__":
-            ret = {}
+            ret = super().valid_import_names
             if self.directory:
                 for file in self.directory:
                     if file.name == "__init__":