drop python 3.8 support

Author: svirpioj

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14"]
         requirements-file: ["requirements.txt"]
     runs-on: ${{ matrix.os }}
     steps:
@@ -68,11 +68,11 @@ jobs:
           if [[ ${{ github.event.ref }} =~ ^refs/tags/[0-9]+\.[0-9]+\.[0-9]+(rc[0-9]*)?$ ]]; then
               echo "match=true" >> $GITHUB_OUTPUT
           fi
-      - name: Set up Python 3.8
+      - name: Set up Python 3.13
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.13
       - name: Install pypa/build
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')
         run: >-
@@ -106,10 +106,10 @@ jobs:
     needs: [build-n-test]
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.8
+      - name: Set up Python 3.13
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: 3.13
       - name: Install dependencies to build docs
         run: |
           python -m pip install --upgrade pip

AGENTS.md

@@ -30,7 +30,7 @@ OpusFilter is a tool for filtering and processing parallel corpora. It's written
 
 ### General Rules
 - Follow PEP 8 with a maximum line length of 127 characters (not 79)
-- Support Python 3.8 to 3.13
+- Support Python 3.9 to 3.14
 - Use type hints where appropriate (see existing code for patterns)
 - Maintain backward compatibility when possible
 - Do not add trailing whitespace

README.md

@@ -25,7 +25,7 @@ Install from source:
 
 ### Troubleshooting
 
-OpusFilter should generally work fine on Python 3.8 to 3.14. In the case of troubles, try installing the exact versions in `requirements.txt`:
+OpusFilter should generally work fine on Python 3.9 to 3.14. In the case of troubles, try installing the exact versions in `requirements.txt`:
 
 * `pip install -r requirements.txt`
 

docs/CONTRIBUTING.md

@@ -5,7 +5,7 @@ issues page. We are also happy to consider pull requests. There are a
 few rules for pull requests:
 
 * Make a pull request to the `develop` branch instead of `master`.
-* The code should support at least Python versions from 3.8 to 3.14.
+* The code should support at least Python versions from 3.9 to 3.14.
 * Please follow [PEP 8](https://www.python.org/dev/peps/pep-0008/). Exception: The maximum line length is 127 characters instead of 79.
 * Especially for new features, please include test cases for unit testing.
 
@@ -19,7 +19,7 @@ work, if you have VariKN and eflomal set up as instructed - `pytest`
 skips the respective tests if not.)
 
 GitHub workflows defined in the project run automatically `flake8`
-checks and unit testing with `pytest` using Python 3.8, 3.9, 3.10,
+checks and unit testing with `pytest` using Python 3.9, 3.10,
 3.11, 3.12, and 3.14.
 
 Especially for larger contributions, consider using a code analysis

docs/installation.md

@@ -12,7 +12,7 @@ Install from source:
 
 Note that all required libraries are not available to install via PyPI
 on Windows OS. On Linux and MacOS, it should work directly for Python
-versions from 3.8 to 3.14.
+versions from 3.9 to 3.14.
 
 ## Required libraries
 

pyproject.toml

@@ -36,15 +36,15 @@ classifiers = [
     "Topic :: Scientific/Engineering :: Artificial Intelligence",
     "Topic :: Text Processing :: Linguistic",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",
     "Programming Language :: Python :: 3.12",
     "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
     "Operating System :: OS Independent",
 ]
-requires-python = ">=3.8"
+requires-python = ">=3.9"
 dependencies = [
     "setuptools",
     "opustools>=1.8.3",
@@ -172,7 +172,7 @@ line_length = 127
 multi_line_output = 3
 
 [tool.mypy]
-python_version = "3.8"
+python_version = "3.9"
 warn_return_any = true
 warn_unused_configs = true
 ignore_missing_imports = true