From 6e7c17df7c48201f37794ed6ab938805764f378d Mon Sep 17 00:00:00 2001
From: Santiago Soler <santisoler@fastmail.com>
Date: Fri, 14 Jun 2024 10:41:53 -0700
Subject: [PATCH] Drop support for Python 3.8 (#497)

Bump minimal supported Python version to 3.8. Bump minimum versions of
some dependencies (scipy, numba, pandas). Update the table of supported
versions in the docs. Update test workflows to run 3.9 as the oldest
version of Python.
---
 .github/workflows/test.yml | 6 +++---
 doc/compatibility.rst      | 2 ++
 doc/install.rst            | 2 +-
 pyproject.toml             | 9 ++++-----
 4 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 10e739b9e..bf2c7ca61 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -44,15 +44,15 @@ jobs:
           - optional
         include:
           - dependencies: oldest
-            python: "3.8"
+            python: "3.9"
           - dependencies: latest
             python: "3.11"
           - dependencies: optional
             python: "3.11"
-          # test on macos-13 (x86) using oldest dependencies and python 3.8
+          # test on macos-13 (x86) using oldest dependencies and python 3.9
           - os: macos-13
             dependencies: oldest
-            python: "3.8"
+            python: "3.9"
         exclude:
           # don't test on macos-latest (arm64) with oldest dependencies
           - os: macos-latest
diff --git a/doc/compatibility.rst b/doc/compatibility.rst
index 336bbed61..9acaeb1ed 100644
--- a/doc/compatibility.rst
+++ b/doc/compatibility.rst
@@ -64,3 +64,5 @@ following releases to ensure compatibility:
       - 0.4.0
     * - 3.7
       - 0.6.0
+    * - 3.8
+      - 0.6.0
diff --git a/doc/install.rst b/doc/install.rst
index 32d7729e4..c723f98d7 100644
--- a/doc/install.rst
+++ b/doc/install.rst
@@ -42,7 +42,7 @@ There are different ways to install Harmonica:
 Which Python?
 -------------
 
-You'll need **Python 3.8 or greater**.
+You'll need **Python 3.9 or greater**.
 See :ref:`python-versions` if you require support for older versions.
 
 Dependencies
diff --git a/pyproject.toml b/pyproject.toml
index 5734f718f..4f0fea956 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,18 +22,17 @@ classifiers = [
     "Topic :: Scientific/Engineering",
     "Topic :: Software Development :: Libraries",
     "Programming Language :: Python :: 3 :: Only",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "numpy >= 1.21",
-    "pandas >= 1.1",
-    "scipy >= 1.5",
+    "pandas >= 1.4",
+    "scipy >= 1.9",
     "scikit-learn >= 0.24",
-    "numba >= 0.52",
+    "numba >= 0.53",
     "xarray >= 0.16",
     "verde >= 1.7",
     "xrft >= 1.0",