Add draft of annotation-reading code

test/test_parameters.py

@@ -377,3 +377,21 @@ def test_read_datasets_from_product_missing_items(
         params.read_datasets_from_product(tmp_path, {})
     for substring in "missing", "foo", "bar":
         assert substring in str(error)
+
+
+def test_read_annotations_from_code():
+    import textwrap
+    annotated_code = textwrap.dedent(
+        """
+        my_int: int = 42
+        eoproduct: "EOInput" = None
+        """
+    )
+    expected = [
+        {"annotation": "int", "value": "42", "target": "my_int", "line": 2},
+        {"annotation": "'EOInput'", "value": "None", "target": "eoproduct", "line": 3},
+    ]
+
+    annotations = NotebookParameters.read_annotations(annotated_code)
+
+    assert annotations == expected

xcengine/parameters.py

@@ -232,3 +232,21 @@ def cwl_type(type_: type) -> str:
             }[type_]
         except KeyError:
             raise ValueError(f"Unhandled type {type_}")
+
+    @staticmethod
+    def read_annotations(code: str) -> list[dict[str, Any]]:
+        import ast
+        tree = ast.parse(code)
+        annotations: list[dict[str, Any]] = []
+        for node in ast.walk(tree):
+            if not isinstance(node, ast.AnnAssign):
+                continue
+
+            annotations.append({
+                "annotation": ast.unparse(node.annotation),
+                "value": ast.unparse(node.value) if node.value else None,
+                "target": ast.unparse(node.target),
+                "line": node.lineno,
+            })
+
+        return annotations