Drop Python 3.7 and add Python 3.12

.github/workflows/ci.yml

@@ -12,12 +12,12 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7]
+        python-version: ["3.10"]
         toxenv: [black, flake8, mypy]
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -34,21 +34,21 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "pypy-3.7"]
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "pypy-3.7"]
         optional-deps: [true]
         include:
         - os: macos-latest
-          python-version: 3.7
+          python-version: "3.10"
           optional-deps: true
         - os: ubuntu-20.04
-          python-version: 3.7
+          python-version: "3.10"
           optional-deps: false
         - os: ubuntu-20.04
-          python-version: 3.7
+          python-version: "3.10"
           optional-deps: false
           with-zstandard: true
         - os: windows-latest
-          python-version: 3.7
+          python-version: "3.10"
     steps:
     - name: Install optional tools macOS
       if: runner.os == 'macOS' && matrix.optional-deps
@@ -59,11 +59,11 @@ jobs:
     - name: Remove xz
       if: runner.os == 'Linux' && !matrix.optional-deps
       run: while which xz; do sudo rm $(which xz); done
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
@@ -74,28 +74,28 @@ jobs:
       if: matrix.with-zstandard
       run: tox -e zstd
     - name: Upload coverage report
-      uses: codecov/codecov-action@v1
+      uses: codecov/codecov-action@v3
 
   deploy:
     timeout-minutes: 10
     runs-on: ubuntu-latest
     needs: [lint, test]
     if: startsWith(github.ref, 'refs/tags')
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0  # required for setuptools_scm
     - name: Set up Python
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@v4
       with:
-        python-version: 3.7
+        python-version: "3.10"
     - name: Make distributions
       run: |
         python -m pip install build
         python -m build
         ls -l dist/
     - name: Publish to PyPI
-      uses: pypa/gh-action-pypi-publish@v1.4.1
+      uses: pypa/gh-action-pypi-publish@release/v1
       with:
         user: __token__
         password: ${{ secrets.pypi_password }}

tests/test_piped.py

@@ -183,6 +183,18 @@ def test_piped_reader_iter(threads, threaded_reader):
         assert lines[0] == CONTENT_LINES[0]
 
 
+def test_writer(tmp_path, writer):
+    opener, extension = writer
+    print(opener, writer)
+    print(repr(opener))
+    path = tmp_path / f"out{extension}"
+    with opener(path, mode="wt") as f:
+        print(f)
+        f.write("hello")
+    with xopen(path, mode="rt") as f:
+        assert f.read() == "hello"
+
+
 def test_writer_has_iter_method(tmp_path, writer):
     opener, extension = writer
     with opener(tmp_path / f"out.{extension}") as f:

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = flake8,mypy,py37,py38,py39,py310,py311,pypy3
+envlist = flake8,mypy,py38,py39,py310,py311,py312,pypy3
 isolated_build = True
 
 [testenv]
@@ -22,19 +22,19 @@ deps =
     zstandard
 
 [testenv:black]
-basepython = python3.7
+basepython = python3.10
 deps = black==22.3.0
 skip_install = true
 commands = black --check src/ tests/
 
 [testenv:flake8]
-basepython = python3.7
+basepython = python3.10
 deps = flake8
 commands = flake8 src/ tests/
 skip_install = true
 
 [testenv:mypy]
-basepython = python3.7
+basepython = python3.10
 deps = mypy
 commands = mypy src/