migrate more to 3.9+ only

.github/workflows/bump-version.yml

@@ -195,11 +195,11 @@ jobs:
         echo "steps.script.outputs.old_tag=v${current_tag}"
         echo "old_tag=v${current_tag}" >> $GITHUB_OUTPUT
 
-    - name: Set up Python 3.12
+    - name: Set up Python 3.13
       if: success()
       uses: actions/setup-python@v5
       with:
-        python-version: '3.12'
+        python-version: '3.13'
 
     - name: Install Python dependencies
       run: |

.github/workflows/ci-windows.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest]
-        python-version: ['3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
 
     steps:
     - uses: actions/checkout@v4

.github/workflows/ci.yml

@@ -30,13 +30,13 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         include:
           - os: macos-latest
-            python-version: '3.12'
+            python-version: '3.13'
           # Intel runner
           - os: macos-13
-            python-version: '3.12'
+            python-version: '3.13'
 
     steps:
     - uses: actions/checkout@v4
@@ -47,18 +47,10 @@ jobs:
         python-version: ${{ matrix.python-version }}
 
     - name: Install dependencies
-      if: matrix.python-version != '3.8'
       run: |
         python -m pip install uv
         uv pip install --system --upgrade ".[all,test]"
 
-      # c.f. https://github.com/astral-sh/uv/issues/2062
-    - name: Install dependencies (Python 3.8)
-      if: matrix.python-version == '3.8'
-      run: |
-        python -m pip install --upgrade pip
-        python -m pip install --upgrade ".[all,test]"
-
     - name: List installed Python packages
       run: python -m pip list
 
@@ -97,7 +89,7 @@ jobs:
         coverage xml
 
     - name: Report contrib coverage with Codecov
-      if: github.event_name != 'schedule' && matrix.python-version == '3.12' && matrix.os == 'ubuntu-latest'
+      if: github.event_name != 'schedule' && matrix.python-version == '3.13' && matrix.os == 'ubuntu-latest'
       uses: codecov/codecov-action@v5
       with:
         fail_ci_if_error: true
@@ -107,17 +99,17 @@ jobs:
 
     - name: Test docstring examples with doctest
       # TODO: Don't currently try to match amd64 and arm64 floating point for docs, but will in the future.
-      if: matrix.python-version == '3.12' && matrix.os != 'macos-latest'
+      if: matrix.python-version == '3.13' && matrix.os != 'macos-latest'
       run: coverage run --data-file=.coverage-doctest --module pytest src/ README.rst
 
     - name: Coverage report for doctest only
-      if: matrix.python-version == '3.12' && matrix.os != 'macos-latest'
+      if: matrix.python-version == '3.13' && matrix.os != 'macos-latest'
       run: |
         coverage report --data-file=.coverage-doctest
         coverage xml --data-file=.coverage-doctest -o doctest-coverage.xml
 
     - name: Report doctest coverage with Codecov
-      if: github.event_name != 'schedule' && matrix.python-version == '3.12' && matrix.os == 'ubuntu-latest'
+      if: github.event_name != 'schedule' && matrix.python-version == '3.13' && matrix.os == 'ubuntu-latest'
       uses: codecov/codecov-action@v5
       with:
         fail_ci_if_error: true
@@ -126,6 +118,6 @@ jobs:
         token: ${{ secrets.CODECOV_TOKEN }}
 
     - name: Run benchmarks
-      if: github.event_name == 'schedule' && matrix.python-version == '3.12'
+      if: github.event_name == 'schedule' && matrix.python-version == '3.13'
       run: |
         pytest --benchmark-sort=mean tests/benchmarks/test_benchmark.py

.github/workflows/dependencies-head.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest, macos-13]
-        python-version: ['3.12']
+        python-version: ['3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -50,7 +50,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.12']
+        python-version: ['3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -79,7 +79,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.12']
+        python-version: ['3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -105,7 +105,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.12']
+        python-version: ['3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -130,7 +130,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.12']
+        python-version: ['3.13']
 
     steps:
     - uses: actions/checkout@v4
@@ -168,7 +168,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.12']
+        python-version: ['3.13']
 
     steps:
     - uses: actions/checkout@v4

.github/workflows/docs.yml

@@ -27,7 +27,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v5
       with:
-        python-version: '3.12'
+        python-version: '3.13'
 
     - name: Install Python dependencies
       run: |

.github/workflows/lower-bound-requirements.yml

@@ -17,7 +17,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
         # minimum supported Python
-        python-version: ['3.8']
+        python-version: ['3.9']
 
     steps:
     - uses: actions/checkout@v4

.github/workflows/notebooks.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.12']
+        python-version: ['3.13']
 
     steps:
     - uses: actions/checkout@v4

.github/workflows/publish-package.yml

@@ -41,10 +41,10 @@ jobs:
       with:
         fetch-depth: 0
 
-    - name: Set up Python 3.12
+    - name: Set up Python 3.13
       uses: actions/setup-python@v5
       with:
-        python-version: '3.12'
+        python-version: '3.13'
 
     - name: Install python-build and twine
       run: |

.github/workflows/release_tests.yml

@@ -21,13 +21,13 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         include:
           - os: macos-latest
-            python-version: '3.12'
+            python-version: '3.13'
           # Intel runner
           - os: macos-13
-            python-version: '3.12'
+            python-version: '3.13'
       fail-fast: false
 
     steps:

tests/contrib/test_viz.py

@@ -1,5 +1,4 @@
 import json
-import sys
 
 import matplotlib
 import matplotlib.pyplot as plt
@@ -68,10 +67,6 @@ def test_plot_results(datadir):
 
 
 @pytest.mark.mpl_image_compare
-@pytest.mark.xfail(
-    sys.version_info < (3, 8),
-    reason="baseline image generated with matplotlib v3.6.0 which is Python 3.8+",
-)
 def test_plot_results_no_axis(datadir):
     data = json.load(datadir.joinpath("hypotest_results.json").open(encoding="utf-8"))