From 44e1bc946052c3425965853ebfaa4f17dbdf44cb Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 21 Jul 2025 18:53:29 +0000
Subject: [PATCH 01/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.9.7 → v0.12.4](https://github.com/astral-sh/ruff-pre-commit/compare/v0.9.7...v0.12.4)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 61cb4d6..7534103 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,7 +17,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.9.7
+  rev: v0.12.4
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 3baf28598410cbd3c17ffefa3abf9b3f7e605e70 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 28 Jul 2025 18:50:36 +0000
Subject: [PATCH 02/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.12.4 → v0.12.5](https://github.com/astral-sh/ruff-pre-commit/compare/v0.12.4...v0.12.5)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7534103..f9b377d 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,7 +17,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.12.4
+  rev: v0.12.5
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 30541e0092912581fa0f4d9d084e0d44257d9043 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 11 Aug 2025 19:22:04 +0000
Subject: [PATCH 03/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/pre-commit/pre-commit-hooks: v5.0.0 → v6.0.0](https://github.com/pre-commit/pre-commit-hooks/compare/v5.0.0...v6.0.0)
- [github.com/astral-sh/ruff-pre-commit: v0.12.5 → v0.12.8](https://github.com/astral-sh/ruff-pre-commit/compare/v0.12.5...v0.12.8)
---
 .pre-commit-config.yaml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f9b377d..b46c4d5 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -1,6 +1,6 @@
 repos:
 -   repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
     - id: check-yaml
     - id: end-of-file-fixer
@@ -17,7 +17,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.12.5
+  rev: v0.12.8
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From e599e60f0258fd06be07e6145f567ff916f3f5fc Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 15 Sep 2025 19:06:13 +0000
Subject: [PATCH 04/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.12.8 → v0.13.0](https://github.com/astral-sh/ruff-pre-commit/compare/v0.12.8...v0.13.0)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index b46c4d5..67f897f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,7 +17,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.12.8
+  rev: v0.13.0
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 8b702316ed4c4c75f8da60d29d4c796269721249 Mon Sep 17 00:00:00 2001
From: Olexandr88 <radole1203@gmail.com>
Date: Sun, 21 Sep 2025 08:23:20 +0300
Subject: [PATCH 05/24] Update README.md (#234)

---
 README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/README.md b/README.md
index ecd78f3..3be1ec7 100644
--- a/README.md
+++ b/README.md
@@ -20,7 +20,7 @@ building design matrices. Patsy brings the convenience of [R](http://www.r-proje
 ![PyPI - Python Version](https://img.shields.io/pypi/pyversions/patsy.svg)
 ![https://patsy.readthedocs.io/](https://img.shields.io/badge/docs-read%20now-blue.svg)
 ![PyPI - Status](https://img.shields.io/pypi/status/patsy.svg)
-![https://coveralls.io/r/pydata/patsy?branch=master](https://coveralls.io/repos/pydata/patsy/badge.png?branch=master)
+[![https://coveralls.io/r/pydata/patsy?branch=master](https://coveralls.io/repos/pydata/patsy/badge.png?branch=master)](https://coveralls.io/github/pydata/patsy)
 ![https://doi.org/10.5281/zenodo.592075](https://zenodo.org/badge/DOI/10.5281/zenodo.592075.svg)
 
 - **Documentation:** <https://patsy.readthedocs.io/>

From 31c489fdf672a8f747d696f6346a80b8516bda21 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 29 Sep 2025 18:57:36 +0000
Subject: [PATCH 06/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.13.0 → v0.13.2](https://github.com/astral-sh/ruff-pre-commit/compare/v0.13.0...v0.13.2)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 67f897f..d493af3 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -17,7 +17,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.13.0
+  rev: v0.13.2
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From efa450f67d57f4b280b4423b6062f9096a048bfb Mon Sep 17 00:00:00 2001
From: Kevin Sheppard <bashtage@users.noreply.github.com>
Date: Mon, 20 Oct 2025 17:05:36 +0100
Subject: [PATCH 07/24] MAINT: Prepare patsy for pandas3 StringDtype (#229)

---
 .pre-commit-config.yaml |  2 --
 patsy/missing.py        |  2 +-
 patsy/test_highlevel.py | 18 ++++++++++++++++++
 patsy/util.py           | 27 ++++++++++++++++++++++-----
 tox.ini                 |  3 ++-
 5 files changed, 43 insertions(+), 9 deletions(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d493af3..5241702 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -7,8 +7,6 @@ repos:
     - id: trailing-whitespace
     - id: fix-byte-order-marker
     - id: destroyed-symlinks
-    - id: fix-encoding-pragma
-      args: ["--remove"]
     - id: mixed-line-ending
     - id: name-tests-test
       args: ["--pytest-test-first"]
diff --git a/patsy/missing.py b/patsy/missing.py
index b4d8a01..0ea262b 100644
--- a/patsy/missing.py
+++ b/patsy/missing.py
@@ -183,7 +183,7 @@ def _handle_NA_drop(self, values, is_NAs, origins):
             total_mask |= is_NA
         good_mask = ~total_mask
         # "..." to handle 1- versus 2-dim indexing
-        return [v[good_mask, ...] for v in values]
+        return [v[good_mask] if v.ndim == 1 else v[good_mask, ...] for v in values]
 
     __getstate__ = no_pickling
 
diff --git a/patsy/test_highlevel.py b/patsy/test_highlevel.py
index 35c86a1..2fad925 100644
--- a/patsy/test_highlevel.py
+++ b/patsy/test_highlevel.py
@@ -979,3 +979,21 @@ def test_C_and_pandas_categorical():
         assert np.allclose(
             dmatrix("C(obj, levels=['a', 'b'])", d), [[1, 0], [1, 1], [1, 0]]
         )
+
+
+def test_NAActioon_pandas_string_index():
+    if not have_pandas:
+        return
+    from patsy.missing import NAAction
+
+    formula = "1 + x + z"
+    action = NAAction("drop")
+    data = pandas.DataFrame(
+        {"z": [1.0, np.nan, 2.0], "x": [1, 2, 3]}, index=["a", "b", "c"]
+    )
+    dm = dmatrix(formula, data, 0, NA_action=action, return_type="dataframe")
+    di = dm.design_info
+    data2 = pandas.DataFrame({"z": [4.0, 5.0], "x": [6, 7]})
+    dm2 = dmatrix(di, data2, 0, return_type="dataframe")
+    assert np.allclose(dm2, [[1.0, 6.0, 4.0], [1.0, 7.0, 5.0]])
+    assert list(dm2.columns) == ["Intercept", "x", "z"]
diff --git a/patsy/util.py b/patsy/util.py
index 2c1c19d..d666d38 100644
--- a/patsy/util.py
+++ b/patsy/util.py
@@ -40,14 +40,19 @@
 try:
     import pandas
 except ImportError:
-    have_pandas = False
+    PANDAS3 = have_pandas = False
 else:
     have_pandas = True
+    import packaging.version
+
+    pandas_version = packaging.version.parse(pandas.__version__)
+    PANDAS3 = pandas_version >= packaging.version.parse("3.0.0.dev0")
 
 # Pandas versions < 0.9.0 don't have Categorical
 # Can drop this guard whenever we drop support for such older versions of
 # pandas.
 have_pandas_categorical = have_pandas and hasattr(pandas, "Categorical")
+have_pandas_string_dtype = have_pandas and hasattr(pandas, "StringDtype")
 if not have_pandas:
     _pandas_is_categorical_dtype = None
 else:
@@ -65,6 +70,11 @@
         )
 have_pandas_categorical_dtype = _pandas_is_categorical_dtype is not None
 
+
+def safe_is_pandas_string_dtype(x):
+    return have_pandas_string_dtype and isinstance(x, pandas.StringDtype)
+
+
 # The handling of the `copy` keyword has been changed since numpy>=2.
 # https://numpy.org/devdocs/numpy_2_0_migration_guide.html#adapting-to-changes-in-the-copy-keyword
 # If numpy<2 support is dropped, this try-clause can be removed.
@@ -118,7 +128,9 @@ def test_asarray_or_pandas():
         assert s_view1.name == "A"
         assert np.array_equal(s_view1.index, [10, 20, 30])
         s_view1[10] = 101
-        assert s[10] == 101
+        # pandas 3 uses copy-on-write, so no longer valid
+        if not PANDAS3:
+            assert s[10] == 101
         s_copy = asarray_or_pandas(s, copy=True)
         assert s_copy.name == "A"
         assert np.array_equal(s_copy.index, [10, 20, 30])
@@ -130,14 +142,18 @@ def test_asarray_or_pandas():
         assert s_view2.name == "A"
         assert np.array_equal(s_view2.index, [10, 20, 30])
         s_view2[10] = 99
-        assert s[10] == 99
+        # pandas 3 uses copy-on-write, so no longer valid
+        if not PANDAS3:
+            assert s[10] == 99
 
         df = pandas.DataFrame([[1, 2, 3]], columns=["A", "B", "C"], index=[10])
         df_view1 = asarray_or_pandas(df)
         df_view1.loc[10, "A"] = 101
         assert np.array_equal(df_view1.columns, ["A", "B", "C"])
         assert np.array_equal(df_view1.index, [10])
-        assert df.loc[10, "A"] == 101
+        # pandas 3 uses copy-on-write, so no longer valid
+        if not PANDAS3:
+            assert df.loc[10, "A"] == 101
         df_copy = asarray_or_pandas(df, copy=True)
         assert np.array_equal(df_copy, df)
         assert np.array_equal(df_copy.columns, ["A", "B", "C"])
@@ -799,7 +815,8 @@ def test_safe_is_pandas_categorical():
 #   https://github.com/pydata/pandas/issues/9581
 #   https://github.com/pydata/pandas/issues/9581#issuecomment-77099564
 def safe_issubdtype(dt1, dt2):
-    if safe_is_pandas_categorical_dtype(dt1):
+    # The second condition is needed to support pandas >= 3 (!)
+    if safe_is_pandas_categorical_dtype(dt1) or safe_is_pandas_string_dtype(dt1):
         return False
     return np.issubdtype(dt1, dt2)
 
diff --git a/tox.ini b/tox.ini
index c2f2e6a..8feb390 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = {py36,py37,py38,py39,py310,py311,py312,py313}-{with_pandas,without_pandas}
+envlist = {py36,py37,py38,py39,py310,py311,py312,py313,py314}-{with_pandas,without_pandas}
 
 [gh-actions]
 python =
@@ -11,6 +11,7 @@ python =
   3.11: py311
   3.12: py312
   3.13: py313
+  3.14: py314
 
 [testenv]
 deps=

From 3555c06a1ed49c542f71552d31206d6e59407c89 Mon Sep 17 00:00:00 2001
From: Matthew Wardrop <mawardrop@netflix.com>
Date: Mon, 20 Oct 2025 09:13:56 -0700
Subject: [PATCH 08/24] 1.0.2

---
 .github/workflows/publish.yml |  2 +-
 doc/changes.rst               |  5 +++++
 patsy/version.py              | 10 +++++-----
 3 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index c006475..6592d4a 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -13,7 +13,7 @@ jobs:
     - name: Set up Python
       uses: actions/setup-python@v1
       with:
-        python-version: '3.7'
+        python-version: '3.10'
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
diff --git a/doc/changes.rst b/doc/changes.rst
index 6d0a590..ffd2f31 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -8,6 +8,11 @@ All Patsy releases are archived at Zenodo:
 .. image:: https://zenodo.org/badge/DOI/10.5281/zenodo.592075.svg
    :target: https://doi.org/10.5281/zenodo.592075
 
+v1.0.2
+------
+
+* Fixed compatibility with Pandas 3's new `StringDtype`.
+
 v1.0.1
 ------
 
diff --git a/patsy/version.py b/patsy/version.py
index c16a1be..48a94bc 100644
--- a/patsy/version.py
+++ b/patsy/version.py
@@ -6,15 +6,15 @@
 # places -- it is imported by patsy/__init__.py, execfile'd by setup.py, etc.
 
 # We use a simple scheme:
-#   1.0.1 -> 1.0.1+dev -> 1.1.0 -> 1.1.0+dev
+#   1.0.2 -> 1.0.2+dev -> 1.1.0 -> 1.1.0+dev
 # where the +dev versions are never released into the wild, they're just what
 # we stick into the VCS in between releases.
 #
 # This is compatible with PEP 440:
 #   http://legacy.python.org/dev/peps/pep-0440/
 # via the use of the "local suffix" "+dev", which is disallowed on index
-# servers and causes 1.0.1+dev to sort after plain 1.0.1, which is what we
-# want. (Contrast with the special suffix 1.0.1.dev, which sorts *before*
-# 1.0.1.)
+# servers and causes 1.0.2+dev to sort after plain 1.0.2, which is what we
+# want. (Contrast with the special suffix 1.0.2.dev, which sorts *before*
+# 1.0.2.)
 
-__version__ = "1.0.1"
+__version__ = "1.0.2"

From 81cf3be09fe96a49b54b0960d935b45eed40fcf9 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 20 Oct 2025 21:13:03 +0000
Subject: [PATCH 09/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.13.2 → v0.14.1](https://github.com/astral-sh/ruff-pre-commit/compare/v0.13.2...v0.14.1)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 5241702..663cc84 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.13.2
+  rev: v0.14.1
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 21f4c905d4f933aa2471de0b37c17c1da3c5429e Mon Sep 17 00:00:00 2001
From: Kevin Sheppard <bashtage@users.noreply.github.com>
Date: Wed, 22 Oct 2025 08:12:26 +0100
Subject: [PATCH 10/24] BUG: Add packaging

Add packaging which was missing in 1.02
---
 setup.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/setup.py b/setup.py
index 4613449..2f9c77a 100644
--- a/setup.py
+++ b/setup.py
@@ -27,6 +27,7 @@
         # Possibly we need an even newer numpy than this, but we definitely
         # need at least 1.4 for triu_indices
         "numpy >= 1.4",
+        "packaging",
     ],
     extras_require={
         "test": ["pytest", "pytest-cov", "scipy"],
@@ -47,6 +48,7 @@
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Topic :: Scientific/Engineering",
     ],
 )

From 04dbea413b98bdff7292b809d567a8abbdc91f7c Mon Sep 17 00:00:00 2001
From: Kevin Sheppard <bashtage@users.noreply.github.com>
Date: Wed, 22 Oct 2025 08:13:45 +0100
Subject: [PATCH 11/24] MAINT: Update CI

Update actions
Ensure actions are kept up to date
Add run for Python 3.14
---
 .github/dependabot.yml    |  8 ++++++++
 .github/workflows/tox.yml | 10 +++++-----
 2 files changed, 13 insertions(+), 5 deletions(-)
 create mode 100644 .github/dependabot.yml

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
new file mode 100644
index 0000000..2608b45
--- /dev/null
+++ b/.github/dependabot.yml
@@ -0,0 +1,8 @@
+version: 2
+updates:
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      # Check for updates to GitHub Actions every week
+      interval: "weekly"
diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 1916809..800a25c 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -14,16 +14,16 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.6', '3.7', '3.8', '3.9', '3.10', '3.11', '3.12', '3.13', '3.14']
         pandas-presence: ['with_pandas', 'without_pandas']
     env:
       PYTHON_VERSION: ${{ matrix.python-version }}
       PANDAS_PRESENCE: ${{ matrix.pandas-presence }}
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v5
     - name: Set up Python ${{ matrix.python-version }}
       id: gha-python
-      uses: actions/setup-python@v4
+      uses: actions/setup-python@v6
       with:
         python-version: ${{ matrix.python-version }}
       continue-on-error: true
@@ -50,8 +50,8 @@ jobs:
         PYTHON_ENV="py$(echo $PYTHON_VERSION | sed 's/\.//;s/\-dev//')"
         tox -e "${PYTHON_ENV}-${PANDAS_PRESENCE}"
     - name: Upload coverage to Codecov
-      uses: codecov/codecov-action@v1.0.10
+      uses: codecov/codecov-action@v5
       with:
-        file: ./coverage.xml
+        files: ./coverage.xml
         flags: unittests
         env_vars: PYTHON_VERSION,PANDAS_PRESENCE

From 9af33c5d62a737b5f1200e0590c61922634c1914 Mon Sep 17 00:00:00 2001
From: Kevin Sheppard <bashtage@users.noreply.github.com>
Date: Wed, 22 Oct 2025 10:32:00 +0100
Subject: [PATCH 12/24] MAINT: Restore doc build

---
 doc/changes.rst           |  2 +-
 doc/conf.py               | 14 ++++++-------
 doc/index.rst             | 41 ++++++++++++++-------------------------
 doc/spline-regression.rst |  2 +-
 4 files changed, 24 insertions(+), 35 deletions(-)

diff --git a/doc/changes.rst b/doc/changes.rst
index ffd2f31..878968f 100644
--- a/doc/changes.rst
+++ b/doc/changes.rst
@@ -87,7 +87,7 @@ New features:
   characters as valid formula descriptions in
   the high-level formula API (:func:`dmatrix` and friends). This is
   intended as a convenience for people using Python 2 with ``from
-  __future__ import unicode_literals``. (See :ref:`py2-versus-py3`.)
+  __future__ import unicode_literals``.
 
 Bug fixes:
 
diff --git a/doc/conf.py b/doc/conf.py
index 2ad5d64..f509ffe 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -75,9 +75,9 @@
 # Undocumented trick: if we def setup here in conf.py, it gets called just
 # like an extension's setup function.
 def setup(app):
-    app.add_javascript("show-code.js")
-    app.add_javascript("facebox.js")
-    app.add_stylesheet("facebox.css")
+    app.add_js_file("show-code.js")
+    app.add_js_file("facebox.js")
+    app.add_js_file("facebox.css")
 
 
 # Add any paths that contain templates here, relative to this directory.
@@ -240,9 +240,9 @@ def setup(app):
 autoclass_content = "both"
 
 intersphinx_mapping = {
-    "python": ("http://docs.python.org", None),
-    "numpy": ("http://docs.scipy.org/doc/numpy", None),
-    "pandas": ("http://pandas.pydata.org/pandas-docs/stable/", None),
+    "python": ("https://docs.python.org/3/", None),
+    "numpy": ("https://numpy.org/doc/stable/", None),
+    "pandas": ("https://pandas.pydata.org/pandas-docs/stable/", None),
 }
 
-autodoc_member_order = "source"
+autodoc_member_order = "bysource"
diff --git a/doc/index.rst b/doc/index.rst
index f4e591c..8422374 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -4,38 +4,27 @@
    contain the root `toctree` directive.
 
 patsy - Describing statistical models in Python
-===================================================
+===============================================
+
+Patsy documentation
 
 Contents:
 
 .. toctree::
    :maxdepth: 2
 
-   overview.rst
-
-   quickstart.rst
-
-   formulas.rst
-
-   categorical-coding.rst
-
-   stateful-transforms.rst
-
-   spline-regression.rst
-
-   expert-model-specification.rst
-
-   library-developers.rst
-
-   R-comparison.rst
-
-   py2-versus-py3.rst
-
-   API-reference.rst
-
-   builtins-reference.rst
-
-   changes.rst
+   overview
+   quickstart
+   formulas
+   categorical-coding
+   stateful-transforms
+   spline-regression
+   expert-model-specification
+   library-developers
+   R-comparison
+   API-reference
+   builtins-reference
+   changes
 
 Indices and tables
 ==================
diff --git a/doc/spline-regression.rst b/doc/spline-regression.rst
index df0d265..ae50247 100644
--- a/doc/spline-regression.rst
+++ b/doc/spline-regression.rst
@@ -179,7 +179,7 @@ marginal spline bases patterns can be observed on the x and y contour projection
       ....:            {"x1": x1.ravel(), "x2": x2.ravel(), "df": df})
       ....:
 
-   In [80]: print y.shape
+   In [80]: print(y.shape)
 
    In [90]: fig = plt.figure()
 

From 6d0fbc5206b41f266f935a8621c2558e151bfede Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 3 Nov 2025 19:20:01 +0000
Subject: [PATCH 13/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.1 → v0.14.3](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.1...v0.14.3)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 663cc84..45213c8 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.1
+  rev: v0.14.3
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 53ad9bbe7e1f0d26cc9f7a35fff98039f751d21a Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 3 Nov 2025 20:17:10 +0000
Subject: [PATCH 14/24] Bump actions/setup-python from 1 to 6

Bumps [actions/setup-python](https://github.com/actions/setup-python) from 1 to 6.
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](https://github.com/actions/setup-python/compare/v1...v6)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 .github/workflows/publish.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 6592d4a..3e3273e 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -11,7 +11,7 @@ jobs:
     steps:
     - uses: actions/checkout@v1
     - name: Set up Python
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v6
       with:
         python-version: '3.10'
     - name: Install dependencies

From 07cb489fda87dcef675b99d97cce6c77f2eaa86f Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 3 Nov 2025 20:17:13 +0000
Subject: [PATCH 15/24] Bump actions/checkout from 1 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 1 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v1...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 .github/workflows/publish.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 6592d4a..653377e 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v5
     - name: Set up Python
       uses: actions/setup-python@v1
       with:

From 8f21bb0912faedd4c35241027f2a8680d18a5b73 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 10 Nov 2025 19:28:56 +0000
Subject: [PATCH 16/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.3 → v0.14.4](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.3...v0.14.4)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 45213c8..f1d3cf6 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.3
+  rev: v0.14.4
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 19077fadd44fefc64dc11d2f0cb8680e874a37f6 Mon Sep 17 00:00:00 2001
From: "dependabot[bot]" <49699333+dependabot[bot]@users.noreply.github.com>
Date: Mon, 24 Nov 2025 19:05:30 +0000
Subject: [PATCH 17/24] Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
---
 .github/workflows/publish.yml | 2 +-
 .github/workflows/tox.yml     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index c2bdf94..8f9ff42 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python
       uses: actions/setup-python@v6
       with:
diff --git a/.github/workflows/tox.yml b/.github/workflows/tox.yml
index 800a25c..a6fad55 100644
--- a/.github/workflows/tox.yml
+++ b/.github/workflows/tox.yml
@@ -20,7 +20,7 @@ jobs:
       PYTHON_VERSION: ${{ matrix.python-version }}
       PANDAS_PRESENCE: ${{ matrix.pandas-presence }}
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Python ${{ matrix.python-version }}
       id: gha-python
       uses: actions/setup-python@v6

From 43b42f819b0e253535c6887dbea551f48b143358 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 24 Nov 2025 19:23:05 +0000
Subject: [PATCH 18/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.4 → v0.14.6](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.4...v0.14.6)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f1d3cf6..e027b4b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.4
+  rev: v0.14.6
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From f2998b2393a1d1cd8bdcf8b250dcc5cca8c92426 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 1 Dec 2025 19:33:20 +0000
Subject: [PATCH 19/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.6 → v0.14.7](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.6...v0.14.7)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index e027b4b..407116b 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.6
+  rev: v0.14.7
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From dafbaf1f0901c6e7eea8dd0b4b11568706a1a642 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 8 Dec 2025 19:25:26 +0000
Subject: [PATCH 20/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.7 → v0.14.8](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.7...v0.14.8)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 407116b..7630027 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.7
+  rev: v0.14.8
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 2f104f96806a31aea2a66ad02d7c4898ace81966 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 15 Dec 2025 19:21:00 +0000
Subject: [PATCH 21/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.8 → v0.14.9](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.8...v0.14.9)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 7630027..53aaa11 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.8
+  rev: v0.14.9
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From c5880703355915920e5402f9b59ea00534ad7641 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 22 Dec 2025 19:04:31 +0000
Subject: [PATCH 22/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.9 → v0.14.10](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.9...v0.14.10)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 53aaa11..62f73d3 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.9
+  rev: v0.14.10
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From eca0a7b85f4f050b759c5ec4353e7737d7026bb9 Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 19 Jan 2026 19:27:07 +0000
Subject: [PATCH 23/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.10 → v0.14.13](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.10...v0.14.13)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 62f73d3..c499cea 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.10
+  rev: v0.14.13
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]

From 71dc716ecd1858788e8338ba9e2542f934bee66e Mon Sep 17 00:00:00 2001
From: "pre-commit-ci[bot]"
 <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Date: Mon, 23 Feb 2026 19:25:29 +0000
Subject: [PATCH 24/24] [pre-commit.ci] pre-commit autoupdate
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

updates:
- [github.com/astral-sh/ruff-pre-commit: v0.14.13 → v0.15.2](https://github.com/astral-sh/ruff-pre-commit/compare/v0.14.13...v0.15.2)
---
 .pre-commit-config.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index c499cea..9a2f844 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -15,7 +15,7 @@ repos:
       exclude: ".ipynb"
 
 - repo: https://github.com/astral-sh/ruff-pre-commit
-  rev: v0.14.13
+  rev: v0.15.2
   hooks:
     - id: ruff-format
       types_or: [ python, pyi, jupyter ]