update action to build python package

.github/workflows/build-python-package.yml

@@ -0,0 +1,77 @@
+name: Build python package
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+  workflow_dispatch:
+
+jobs:
+  build_wheels:
+    name: Build wheels for ${{ matrix.platform-id }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - os: ubuntu-20.04
+            platform-id: manylinux_x86_64
+          - os: windows-2019
+            platform-id: win_amd64
+          - os: macos-latest
+            platform-id: macosx_x86_64
+          - os: macos-latest
+            platform-id: macosx_arm64
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Build wheels
+        uses: pypa/[email protected]
+        env:
+          CIBW_BUILD: cp38-${{ matrix.platform-id }}
+          CIBW_ARCHS: all
+          CIBW_TEST_SKIP: '*-macosx_arm64'
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: ./wheelhouse/*.whl
+
+  build_sdist:
+    name: Build sdist
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.8'
+
+      - name: Build sdist
+        run: |
+          python -m pip install build scikit-build-core
+          python -m build --sdist --outdir dist
+
+      - uses: actions/upload-artifact@v3
+        with:
+          path: ./dist/*.tar.gz
+
+  upload_all:
+    # if: github.repository == 'Nixtla/coreforecast' && startsWith(github.ref, 'refs/tags/v')
+    needs: [build_wheels, build_sdist]
+    runs-on: ubuntu-latest
+    permissions:
+      id-token: write
+    steps:
+    - uses: actions/download-artifact@v3
+      with:
+        name: artifact
+        path: dist
+
+    - name: Display structure of downloaded files
+      run: ls -R dist
+
+    # - name: Publish package to PyPI
+    #   uses: pypa/gh-action-pypi-publish@release/v1

coreforecast/grouped_array.py

@@ -1,8 +1,13 @@
 import ctypes
 import platform
+import sys
 
 import numpy as np
-from importlib_resources import files
+
+if sys.version_info < (3, 10):
+    from importlib_resources import files
+else:
+    from importlib.resources import files
 
 
 if platform.system() in ("Windows", "Microsoft"):