Fix Ubuntu packaging failure - scipy manylinux compatibility (#865)

* Fix Ubuntu packaging failure by aligning cibuildwheel config with Python version requirement

The cibuildwheel configuration was attempting to build wheels for Python 3.9 and 3.10,
but the package requires Python >=3.11 (as specified in requires-python). This mismatch
caused the Ubuntu packaging workflow to fail during validation.

Changes:
- Updated [tool.cibuildwheel] build list to only include cp311-* and cp312-*
- Removed cp39-* and cp310-* from the build list

Fixes #863

Co-Authored-By: Claude (claude-sonnet-4-5) <noreply@anthropic.com>

* Pin scipy to <1.17.0 to fix Ubuntu packaging failure

The Ubuntu packaging build was failing because scipy 1.17.0 (released
January 2026) only provides manylinux_2_27/manylinux_2_28 wheels, which
are incompatible with the manylinux2014 (manylinux_2_17) containers used
by cibuildwheel. This caused pip to fall back to building scipy from
source, which failed due to missing OpenBLAS dependency.

By pinning scipy to <1.17.0, we ensure pip only selects versions that
have compatible manylinux2014 wheels (like scipy 1.16.3), preventing the
source build fallback and resolving the build failure.

Fixes #863

Co-Authored-By: Claude (claude-sonnet-4-5) <noreply@anthropic.com>

* Address CoPilot review comments - ensure consistency across config files

1. Update scipy constraint in RTD environment file
   - Pin scipy to <1.17.0 in docs/environment-py311-rtd.yml
   - Prevents manylinux2014 compatibility issues during doc builds

2. Update GitHub Actions workflows for Python 3.11+ requirement
   - Remove Python 3.9 and 3.10 from test-build-from-source.yml
   - Remove Python 3.9 and 3.10 from test-pypi-install.yml
   - Aligns with requires-python = ">=3.11" in pyproject.toml

3. Explicitly set manylinux image in cibuildwheel config
   - Add manylinux-x86_64-image = "manylinux2014"
   - Add manylinux-aarch64-image = "manylinux2014"
   - Ensures consistent manylinux level across all Python versions

Co-Authored-By: Claude (claude-sonnet-4-5) <noreply@anthropic.com>

---------

Co-authored-by: Claude (claude-sonnet-4-5) <noreply@anthropic.com>

Author: jeongyoonlee

.github/workflows/test-build-from-source.yml

@@ -19,13 +19,9 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.11", "3.12"]
         tf-label: ['', '-tf']
         include:
-          - python-version: "3.9"
-            python-version-nd: 39
-          - python-version: "3.10"
-            python-version-nd: 310
           - python-version: "3.11"
             python-version-nd: 311
           - python-version: "3.12"

.github/workflows/test-pypi-install.yml

@@ -12,12 +12,8 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.9", "3.10", "3.11", "3.12"]
+        python-version: ["3.11", "3.12"]
         include:
-          - python-version: "3.9"
-            python-version-nd: 39
-          - python-version: "3.10"
-            python-version-nd: 310
           - python-version: "3.11"
             python-version-nd: 311
           - python-version: "3.12"

docs/environment-py311-rtd.yml

@@ -24,7 +24,7 @@ dependencies:
     - pyro-api>=0.1.2
     - pyro-ppl>=1.9.1
     - scikit-learn>=1.6.0
-    - scipy>=1.16.0
+    - scipy>=1.16.0,<1.17.0  # Pin to versions with manylinux2014 wheels
     - seaborn>=0.13.2
     - shap>=0.46.0
     - statsmodels>=0.14.5

pyproject.toml

@@ -26,7 +26,7 @@ dependencies = [
     "forestci==0.6",
     "pathos==0.2.9",
     "numpy>=1.25.2",
-    "scipy>=1.16.0",
+    "scipy>=1.16.0,<1.17.0",  # Pin to versions with manylinux2014 wheels (1.17.0+ requires manylinux_2_27)
     "matplotlib",
     "pandas>=0.24.1",
     "scikit-learn>=1.6.0",
@@ -71,5 +71,7 @@ homepage = "https://github.com/uber/causalml"
 [tool.cibuildwheel]
 build = ["cp311-*", "cp312-*"]
 build-verbosity = 1
+manylinux-x86_64-image = "manylinux2014"
+manylinux-aarch64-image = "manylinux2014"
 # Skip 32-bit builds
 skip = ["*-win32", "*-manylinux_i686", "*-musllinux*"]