add SwapKV

.github/workflows/ci.yml

@@ -82,7 +82,7 @@ jobs:
         run: python -m twine upload dist/*
 
       - name: Github Release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
 
   mkdocs-github-pages:
     if: "!startsWith(github.ref, 'refs/tags/')"
@@ -93,7 +93,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: 3.12
-      - uses: actions/cache@v3
+      - uses: actions/cache@v4
         with:
           key: ${{ github.ref }}
           path: .cache

.pre-commit-config.yaml

@@ -3,7 +3,7 @@ ci:
   autoupdate_schedule: quarterly
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v4.5.0
+    rev: v4.6.0
     hooks:
       - id: check-added-large-files
       - id: check-yaml
@@ -29,19 +29,19 @@ repos:
       - id: add-trailing-comma
 
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.15.0
+    rev: v3.15.2
     hooks:
       - id: pyupgrade
         args: [--py311-plus]
 
   - repo: https://github.com/charliermarsh/ruff-pre-commit
-    rev: v0.1.7
+    rev: v0.3.7
     hooks:
       - id: ruff
         args: [--fix, --exit-non-zero-on-fix]
 
   - repo: https://github.com/PyCQA/pylint
-    rev: v3.0.1
+    rev: v3.1.0
     hooks:
       - id: pylint
         additional_dependencies: ["pylint-per-file-ignores"]
@@ -52,7 +52,7 @@ repos:
   #     - id: autopep8
 
   - repo: https://github.com/PyCQA/flake8
-    rev: 6.1.0
+    rev: 7.0.0
     hooks:
     - id: flake8
       additional_dependencies: [Flake8-pyproject]

docs/reference.md

@@ -203,6 +203,14 @@ Same as `FilterKeys` but for `v` in `(k, v)` pairs
 
 ```
 
+## SwapKV
+
+```py
+>>> [(0, 1), (2, 3)] | SwapKV() | Pipe(list)
+[(1, 0), (3, 2)]
+
+```
+
 ## Grep
 
 ```py

docs/similar-tools.md

@@ -31,3 +31,5 @@
 - [petl-developers/petl: Python Extract Transform and Load Tables of Data](https://github.com/petl-developers/petl)
 - [Show HN: Pypipe – A Python command-line tool for pipeline processing | Hacker News](https://news.ycombinator.com/item?id=37981683)
 - [Marcel the Shell | Hacker News](https://news.ycombinator.com/item?id=37991746)
+- [cgarciae/pypeln: Concurrent data pipelines in Python >>>](https://github.com/cgarciae/pypeln)
+- [sfermigier/awesome-functional-python: A curated list of awesome things related to functional programming in Python.](https://github.com/sfermigier/awesome-functional-python)

pipe21.py

@@ -30,6 +30,7 @@ class ValueBy      (B): __ror__ = lambda self, it: ((x, self.f(x)) for x in it)
 class Append       (B): __ror__ = lambda self, it: ((*x, self.f(x)) for x in it)
 class Keys         (B): __ror__ = lambda self, it: (k for k, v in it)
 class Values       (B): __ror__ = lambda self, it: (v for k, v in it)
+class SwapKV       (B): __ror__ = lambda self, it: it | Map(operator.itemgetter(1, 0))
 class Grep         (B): __ror__ = lambda self, it: it | (FilterFalse if self.kw.get('v', False) else Filter)(re.compile(self.f, flags=re.IGNORECASE if self.kw.get('i', False) else 0).search)
 class IterLines    (B): __ror__ = lambda self, f: (x.strip() if self.kw.get('strip', True) else x for x in open(f))
 class Count        (B): __ror__ = lambda self, it: sum(1 for _ in it)

tests/pipe_test.py

@@ -167,6 +167,15 @@ def test_values(it, expected):
     assert it | Values() | Pipe(list) == expected
 
 
+@pytest.mark.parametrize(
+    ('it', 'expected'), [
+        ([(0, 1), (2, 3)], [(1, 0), (3, 2)]),
+    ],
+)
+def test_swap_kv(it, expected):
+    assert it | SwapKV() | Pipe(list) == expected
+
+
 @pytest.mark.parametrize(
     ('it', 'grep', 'expected'), [
         (['hello foo', 'world', 'awesome FOo'], 'foo', ['hello foo']),