From 632aab1e952d171618d111834c16dda545ae53f5 Mon Sep 17 00:00:00 2001
From: Jerry Guo <Jerry.Jinfeng.Guo@alliander.com>
Date: Wed, 19 Jun 2024 15:39:17 +0200
Subject: [PATCH 1/2] dropping 3.9 support

Signed-off-by: Jerry Guo <Jerry.Jinfeng.Guo@alliander.com>
---
 .github/workflows/build-test-and-sonar.yml | 8 ++++----
 pyproject.toml                             | 4 ++--
 2 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/build-test-and-sonar.yml b/.github/workflows/build-test-and-sonar.yml
index bb51ee24..6c16b2ca 100644
--- a/.github/workflows/build-test-and-sonar.yml
+++ b/.github/workflows/build-test-and-sonar.yml
@@ -97,10 +97,10 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python: ["3.9", "3.10", "3.11", "3.12"]
+        python: ["3.10", "3.11", "3.12"]
         exclude:
           - os: macos-latest
-            python: "3.9"
+            python: "3.10"
       fail-fast: false
     runs-on: ${{ matrix.os }}
 
@@ -131,10 +131,10 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python: ["3.9", "3.10", "3.11", "3.12"]
+        python: ["3.10", "3.11", "3.12"]
         exclude:
           - os: macos-latest
-            python: "3.9"
+            python: "3.10"
       fail-fast: false
     runs-on: ${{ matrix.os }}
 
diff --git a/pyproject.toml b/pyproject.toml
index d3e7cf10..5afec20e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,7 +26,7 @@ classifiers=[
     "Operating System :: MacOS",
     "Topic :: Scientific/Engineering :: Physics",
 ]
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 dependencies = [
     "numpy>=1.20",
     "openpyxl",
@@ -84,7 +84,7 @@ addopts = ["--cov=power_grid_model_io", "--cov-report=term", "--cov-report=html:
 
 [tool.black]
 line-length = 120
-target-version = ["py39", "py310", "py311"]
+target-version = ["py310", "py311"]
 
 [tool.isort]
 profile = "black"

From 58f23588f2be79be34083e050c7dd11ddec5b6f4 Mon Sep 17 00:00:00 2001
From: Tony Xiang <tony.xiang@alliander.com>
Date: Wed, 10 Jul 2024 08:54:16 +0200
Subject: [PATCH 2/2] Update .readthedocs.yaml

Signed-off-by: Tony Xiang <tony.xiang@alliander.com>
---
 .readthedocs.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 1f8f5b3b..5c2d3836 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -11,7 +11,7 @@ sphinx:
 build:
   os: "ubuntu-20.04"
   tools:
-    python: "3.9"
+    python: "3.10"
   jobs:
     post_install:
       # Build package with doc requirements from pyproject.optional-dependencies