Version 1.6.1: install the numpy and MeshPy the package works with (#120)

setup.py asked for numpy>=1.22.2 and meshpy>=2018.2.1, so pip
installed microstructpy 1.6.0 with numpy 2.5 and MeshPy 2026.1, while
the continuous integration installs requirements.txt, which pins numpy
below 2 and MeshPy 2022.1.3. With those newest versions, 13 of the 224
tests fail. With numpy 2, the text files of the meshes cannot be read
back (numpy writes integers as np.int64(4)) and tangent_sphere fails.
With MeshPy 2026, TetGen lets 3D elements exceed max_volume.

setup.py now asks for numpy<2 and meshpy<2026. Installed that way, pip
takes numpy 1.26.4 and MeshPy 2025.1.1 (2022.1.3 on Python 3.9), and
all 224 tests pass. numpy below 2 has no wheels for Python 3.13 and
later, but pip builds it from source there; on Python 3.14 that takes
under a minute, and all the tests pass.

One more CI job, Python 3.12 on Ubuntu, skips requirements.txt and
installs the package alone, as pip install microstructpy does, so that
the tests see the dependency versions that users get. It does not
upload coverage, which the pinned job of the same Python and system
already reports. Suggested by Kip Hart in the review.

The changelog has a 1.6.1 section, __version__ is 1.6.1, and the example
digest of the documentation is updated.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Author: rimoli

.github/workflows/python_package.yaml

@@ -4,14 +4,22 @@ on: [push]
 
 jobs:
   pytest:
-    name: pytest for py${{ matrix.python-version }} on ${{ matrix.os }}
+    name: pytest for py${{ matrix.python-version }} on ${{ matrix.os }}${{ matrix.unpinned && ', unpinned' || '' }}
 
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
         python-version: [3.9, '3.10', '3.11', '3.12']
         os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
+        unpinned: [false]
+        include:
+          # One job installs the package without the pins of
+          # requirements.txt, as pip install microstructpy does, so that the
+          # tests see the dependency versions that users get.
+          - python-version: '3.12'
+            os: 'ubuntu-latest'
+            unpinned: true
 
     steps:
     - uses: actions/checkout@main
@@ -33,6 +41,7 @@ jobs:
         pip install setuptools wheel
         pip install flake8 pytest pytest-cov coveralls
     - name: Install package requirements
+      if: ${{ !matrix.unpinned }}
       run: pip install -r requirements.txt
     - name: Install package
       run: pip install -e .
@@ -47,6 +56,7 @@ jobs:
       run: pytest --cov=src tests/
 
     - name: Coveralls
+      if: ${{ !matrix.unpinned }}
       env:
         COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
         COVERALLS_FLAG_NAME: py${{ matrix.python-version }} on ${{ matrix.os }}

CHANGELOG.rst

@@ -6,6 +6,24 @@ All notable changes to this project will be documented in this file.
 The format is based on `Keep a Changelog`_,
 and this project adheres to `Semantic Versioning`_.
 
+`1.6.1`_ - 2026-10-19
+--------------------------
+Fixed
+'''''
+- ``pip install microstructpy`` installs versions of numpy and MeshPy that
+  the package works with: numpy below 2 and MeshPy below 2026. With numpy 2,
+  the text files of the meshes cannot be read back, since numpy writes
+  integers as ``np.int64(4)``, and ``tangent_sphere`` fails. With MeshPy
+  2026, TetGen no longer keeps the elements of 3D meshes under
+  ``max_volume``. numpy below 2 has no wheels for Python 3.13 and later, so
+  pip builds it from source there, which needs a compiler.
+
+Changed
+'''''''
+- The continuous integration also runs the tests on an installation without
+  the pins of ``requirements.txt``, as ``pip install microstructpy`` does, so
+  that it sees the dependency versions that users get.
+
 `1.6.0`_ - 2026-10-18
 --------------------------
 Added
@@ -508,7 +526,8 @@ Added
 
 .. LINKS
 
-.. _`Unreleased`: https://github.com/kip-hart/MicroStructPy/compare/v1.6.0...HEAD
+.. _`Unreleased`: https://github.com/kip-hart/MicroStructPy/compare/v1.6.1...HEAD
+.. _`1.6.1`: https://github.com/kip-hart/MicroStructPy/compare/v1.6.0...v1.6.1
 .. _`1.6.0`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.9...v1.6.0
 .. _`1.5.9`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.8...v1.5.9
 .. _`1.5.8`: https://github.com/kip-hart/MicroStructPy/compare/v1.5.7...v1.5.8

docs/source/sphinx_gallery/plot_demos.py

@@ -24,7 +24,7 @@
 # them is edited, and the build would serve stale figures.
 #
 # Managed by docs/example_digest.py. Do not edit by hand.
-EXAMPLES_DIGEST = 'e16a7babf54a2cfe'
+EXAMPLES_DIGEST = '1cc876c00916b073'
 
 example_dir = '../../../src/microstructpy/examples'
 

setup.py

@@ -81,8 +81,8 @@ def find_version(*fname):
         'pybind11',  # must come before meshpy for successful install
         'lsq-ellipse',
         'matplotlib>=3.4.0',
-        'meshpy>=2018.2.1',
-        'numpy>=1.22.2',
+        'meshpy>=2018.2.1,<2026',  # TetGen of 2026 exceeds max_volume
+        'numpy>=1.22.2,<2',  # numpy 2 breaks the mesh text files
         'pygmsh>=7.0.2',
         'pyquaternion',
         'pyvoro-rimoli>=1.4.0',  # pyvoro with the current Voro++

src/microstructpy/__init__.py

@@ -4,4 +4,4 @@
 import microstructpy.seeding
 import microstructpy.verification
 
-__version__ = '1.6.0'
+__version__ = '1.6.1'