From 09e60ce78ffbc5e335b7967528f51d4d6b4e8cd8 Mon Sep 17 00:00:00 2001
From: Christopher Edsall <cje57@cam.ac.uk>
Date: Mon, 10 Jul 2023 16:00:39 +0100
Subject: [PATCH 1/2] Add mimimum version check

---
 rpn-calc/src/rpn_calc.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rpn-calc/src/rpn_calc.py b/rpn-calc/src/rpn_calc.py
index 8879855..3728ea9 100644
--- a/rpn-calc/src/rpn_calc.py
+++ b/rpn-calc/src/rpn_calc.py
@@ -10,6 +10,9 @@
 if TYPE_CHECKING:
     from collections.abc import Iterable
 
+MIN_PYTHON = (3, 10)
+if sys.version_info < MIN_PYTHON:
+    sys.exit("Python %s.%s or later is required.\n" % MIN_PYTHON)
 
 def main(commands: "Iterable" = sys.stdin):
     '''

From e63bf822a0c9b7712dfa1f041fb7984846cab5c3 Mon Sep 17 00:00:00 2001
From: Simon Clifford <sjc306@cam.ac.uk>
Date: Tue, 11 Jul 2023 10:34:59 +0100
Subject: [PATCH 2/2] Document minimum Python version

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index c1ba6f0..8fa6384 100644
--- a/README.md
+++ b/README.md
@@ -55,3 +55,5 @@ pip install pytest
 cd rpn-calc/src
 pytest
 ```
+
+The minimum required version of Python is 3.10.