Prepare for the next release.

.github/FUNDING.yml

@@ -1 +1,2 @@
 github: [nekitdev]
+custom: https://nekit.dev/funding

.github/dependabot.yml

@@ -26,3 +26,5 @@ updates:
       interval: daily
 
     open-pull-requests-limit: 10
+
+    versioning-strategy: increase

.github/workflows/check.yml

@@ -12,27 +12,33 @@ on:
 jobs:
   check:
     name: Check
+
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Setup Python 3.12
-        uses: actions/setup-python@v4
+      - name: Setup Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
-
-      - name: Update PATH
-        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
+          python-version: ${{ matrix.python-version }}
 
       - name: Install Poetry
-        run: curl -sSL https://install.python-poetry.org/ | python -
+        run: pipx install poetry
 
       - name: Configure Poetry
         run: poetry config virtualenvs.in-project true
 
+      - name: Specify the version
+        run: poetry env use python
+
       - name: Install dependencies
-        run: poetry install --with check
+        run: poetry install
 
       - name: Run type checks
         run: poetry run mypy .

.github/workflows/docs.yml

@@ -14,19 +14,19 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Python 3.12
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.12"
 
-      - name: Update PATH
-        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
-
       - name: Install Poetry
-        run: curl -sSL https://install.python-poetry.org/ | python -
+        run: pipx install poetry
 
       - name: Configure Poetry
         run: poetry config virtualenvs.in-project true
 
+      - name: Specify the version
+        run: poetry env use python
+
       - name: Install dependencies
         run: poetry install --with docs
 

.github/workflows/release.yml

@@ -8,25 +8,27 @@ on:
 jobs:
   release:
     name: Release
+
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
       - name: Setup Python 3.12
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: "3.12"
 
-      - name: Update PATH
-        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
-
       - name: Install Poetry
-        run: curl -sSL https://install.python-poetry.org/ | python -
+        run: pipx install poetry
 
       - name: Configure Poetry
         run: poetry config virtualenvs.in-project true
 
+      - name: Specify the version
+        run: poetry env use python
+
       - name: Build
         run: poetry build
 

.github/workflows/test.yml

@@ -12,27 +12,33 @@ on:
 jobs:
   test:
     name: Test
+
+    strategy:
+      matrix:
+        python-version: ["3.8", "3.9", "3.10", "3.11", "3.12"]
+
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Setup Python 3.12
-        uses: actions/setup-python@v4
+      - name: Setup Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v5
         with:
-          python-version: "3.12"
-
-      - name: Update PATH
-        run: echo "$HOME/.local/bin" >> $GITHUB_PATH
+          python-version: ${{ matrix.python-version }}
 
       - name: Install Poetry
-        run: curl -sSL https://install.python-poetry.org/ | python -
+        run: pipx install poetry
 
       - name: Configure Poetry
         run: poetry config virtualenvs.in-project true
 
+      - name: Specify the version
+        run: poetry env use python
+
       - name: Install dependencies
-        run: poetry install --with test
+        run: poetry install
 
       - name: Run tests
         run: poetry run pytest --cov-report xml

.gitignore

@@ -68,6 +68,10 @@ site/
 .mypy_cache/
 .pytype/
 
+# formatters
+
+.ruff_cache/
+
 # cython debugging information
 
 cython_debug/

.pre-commit-config.yaml

@@ -0,0 +1,22 @@
+repos:
+- repo: https://github.com/astral-sh/ruff-pre-commit
+  rev: v0.2.2
+  hooks:
+  - id: ruff
+    name: Run the Ruff linter
+    types_or: [python, pyi]
+    args: [--fix]
+  - id: ruff-format
+    name: Run the Ruff formatter
+    types_or: [python, pyi]
+
+- repo: https://github.com/python-poetry/poetry
+  rev: 1.7.1
+  hooks:
+  - id: poetry-lock
+    stages: [push]
+    name: Run Poetry lock hook
+    args: [--no-update]
+  - id: poetry-check
+    stages: [push]
+    name: Run Poetry check hook

CHANGELOG.md

@@ -86,7 +86,7 @@ No significant changes.
 
 ### Changes
 
-- Functions taking `Predicate[T]` have been updated to accept `Optional[Predicate[T]]`.
+- Functions taking `Predicate[T]` have been updated to accept `OptionalPredicate[T]`.
   Passing `None` as an argument is identical to passing `bool`.
 
   There are three functions which do not accept `None`, though:

docs/predicates.md

@@ -1,7 +1,4 @@
 # Predicates
 
-`iters` defines all `predicate` arguments as [`Optional[Predicate[T]]`][typing.Optional]
+`iters` defines all `predicate` arguments as [`OptionalPredicate[T]`][iters.typing.OptionalPredicate]
 where `T` is the item type of the iterable.
-
-Passing [`None`][None] as the predicate argument is equivalent to passing [`bool`][bool],
-though most functions are optimized to avoid the overhead of function calls to it.

iters/__init__.py

@@ -23,6 +23,7 @@
     wrap_async_iter,
 )
 from iters.iters import Iter, iter, reversed, standard_iter, standard_reversed, wrap_iter
+from iters.mapping_view import MappingView, mapping_view
 from iters.ordered_set import OrderedSet, ordered_set, ordered_set_unchecked
 from iters.sequence_view import SequenceView, sequence_view
 from iters.state import State, stateful
@@ -55,6 +56,9 @@
     "OrderedSet",
     "ordered_set",
     "ordered_set_unchecked",
+    # mapping view
+    "MappingView",
+    "mapping_view",
     # sequence view
     "SequenceView",
     "sequence_view",