remove!: requires-pythonを>=3.10に引き上げる (#915)

`requires-python`を`>=3.10`に引き上げた上、 #873 の解決を確認する。

Python 3.9, 3.10の機能を使うことは別PRで行う。

Resolves: #873

.github/workflows/build_and_deploy.yml

@@ -182,11 +182,11 @@ jobs:
             git fetch private refs/tags/${{ env.PRODUCTION_REPOSITORY_TAG }}
             git -c user.name=dummy -c user.email=dummy@dummy.dummy merge FETCH_HEAD
           ) > /dev/null 2>&1
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         if: matrix.python_whl
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
           architecture: ${{ contains(matrix.artifact_name,'x86') && 'x86' || 'x64' }}
       - name: set up ${{ matrix.target }}
         uses: ./.github/actions/rust-toolchain-from-file

.github/workflows/generate_document.yml

@@ -33,7 +33,7 @@ jobs:
       - name: Set up Python
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
       - name: Setup Java
         uses: actions/setup-java@v4
         with:

.github/workflows/python_lint.yml

@@ -24,7 +24,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
       - name: Install Poetry
         run: |
           python -m pip install --upgrade poetry

.github/workflows/test.yml

@@ -39,10 +39,10 @@ jobs:
         run: |
           sudo apt-get update
           sudo apt-get install -y shellcheck
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
       - name: Install Pyflakes
         run: pip install 'pyflakes>3,<4'
       - name: actionlint
@@ -67,10 +67,10 @@ jobs:
         uses: ./.github/actions/rust-toolchain-from-file
         with:
           components: clippy,rustfmt
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
       - uses: Swatinem/rust-cache@v2
       - run: cargo clippy -v --tests -- -D clippy::all -D warnings --no-deps
       - run: cargo clippy -v -- -D clippy::all -D warnings --no-deps
@@ -125,10 +125,10 @@ jobs:
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
       - name: Set up Rust
         uses: ./.github/actions/rust-toolchain-from-file
       - uses: Swatinem/rust-cache@v2
@@ -272,10 +272,10 @@ jobs:
         working-directory: ./crates/voicevox_core_python_api
     steps:
       - uses: actions/checkout@v4
-      - name: Set up Python 3.8
+      - name: Set up Python 3.10
         uses: actions/setup-python@v5
         with:
-          python-version: "3.8"
+          python-version: "3.10"
       - name: Set up Rust
         uses: ./.github/actions/rust-toolchain-from-file
       - run: |
@@ -296,6 +296,18 @@ jobs:
           for file in ../../example/python/run{,-asyncio}.py; do
             poetry run python "$file" ../test_util/data/model/sample.vvm --dict-dir ../test_util/data/open_jtalk_dic_utf_8-1.11
           done
+          # https://github.com/VOICEVOX/voicevox_core/issues/873 が再発しないかの確認。
+          #
+          # Python 3.8においては、プロセスの終了までにFatal Python errorに至らなくても`StopIteration`までは達することが多い。
+          # #873の要因は依然として不明であるが、`StopIteration`が出ないことの確認をもって#873の解決とすることにする。
+          #
+          # TODO: 10回の実行におよそ60秒ほどかかるため、状況の経過を見てやめる。
+          for _ in {1..10}; do
+            poetry run python ../../example/python/run-asyncio.py ../test_util/data/model/sample.vvm --dict-dir ../test_util/data/open_jtalk_dic_utf_8-1.11 \
+              2> >(tee ./stderr.txt >&2)
+            # shellcheck disable=SC2059
+            ! grep -q StopIteration ./stderr.txt
+          done
   build-and-test-java-api:
     strategy:
       fail-fast: false

crates/voicevox_core_python_api/README.md

@@ -7,7 +7,7 @@ VOICEVOX CORE の Python バインディングです。
 以下の環境が必要です。
 
 - Rustup
-- Python ≧ 3.8
+- Python ≧ 3.10
 - Poetry ≧ 1.6
 
 ```console

crates/voicevox_core_python_api/pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "voicevox_core"
-requires-python = ">=3.8"
+requires-python = ">=3.10"
 dependencies = ["pydantic>=2.5.2,<3"]
 description = "VOICEVOX CORE の Python バインディングです。"
 authors = [{ name = "Hiroshiba", email = "hihokaruta@gmail.com" }]
@@ -38,7 +38,7 @@ description = "VOICEVOX CORE の Python バインディングです。"
 authors = []
 
 [tool.poetry.dependencies]
-python = ">=3.8,<3.13"
+python = ">=3.10,<3.13"
 pydantic = ">=2.5.2,<3"
 
 [tool.poetry.group.docs.dependencies]

example/python/README.md

@@ -45,7 +45,7 @@ windows の場合
 
 TODO:
 
-- Python インタプリタ ≧3.8 + venv
+- Python インタプリタ ≧3.10 + venv
 
 ## 実行