From 6c4840de8f19331e6c51b51f0052032af9834720 Mon Sep 17 00:00:00 2001
From: Pip Liggins <philippa.liggins@dtc.ox.ac.uk>
Date: Thu, 28 Nov 2024 13:43:26 +0000
Subject: [PATCH] fix for 3.9?

---
 src/adtl/parser.py             | 6 +++---
 tests/test_parser.py           | 2 ++
 tests/test_python_interface.py | 2 ++
 tests/test_transformations.py  | 2 ++
 4 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/adtl/parser.py b/src/adtl/parser.py
index 17c2ba9..0101cfa 100644
--- a/src/adtl/parser.py
+++ b/src/adtl/parser.py
@@ -13,7 +13,7 @@
 from datetime import datetime
 from functools import lru_cache
 from pathlib import Path
-from typing import Any, Callable, Iterable, Literal
+from typing import Any, Callable, Iterable, Literal, Union
 
 import fastjsonschema
 import pint
@@ -29,8 +29,8 @@
 DEFAULT_DATE_FORMAT = "%Y-%m-%d"
 
 StrDict = dict[str, Any]
-Rule = str | StrDict
-Context = dict[str, bool | int | str | list[str]] | None
+Rule = Union[str, StrDict]
+Context = Union[dict[str, bool | int | str | list[str]], None]
 
 
 def get_value(row: StrDict, rule: Rule, ctx: Context = None) -> Any:
diff --git a/tests/test_parser.py b/tests/test_parser.py
index 6cd4407..047e8e9 100644
--- a/tests/test_parser.py
+++ b/tests/test_parser.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import collections
 import contextlib
 import io
diff --git a/tests/test_python_interface.py b/tests/test_python_interface.py
index b7e526b..415aa77 100644
--- a/tests/test_python_interface.py
+++ b/tests/test_python_interface.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from pathlib import Path
 
 import adtl
diff --git a/tests/test_transformations.py b/tests/test_transformations.py
index 1b767a8..1dc23c0 100644
--- a/tests/test_transformations.py
+++ b/tests/test_transformations.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 from datetime import datetime
 
 import pytest