[bashtage]

Print more BLAS information before the wheel tests, to help diagnose failures that depend on the platform.

In the run of 5 November, numpy.show_runtime() ran before SciPy was imported, so threadpoolctl listed only the OpenBLAS library of NumPy. SciPy ships its own OpenBLAS (a different version in a local check). On Windows ARM64 the output had no BLAS entry at all.

Changes

• The test command imports statsmodels.api first, so the library of SciPy is loaded and listed by numpy.show_runtime() too.
• It then prints numpy.show_config() and scipy.show_config(), the BLAS and LAPACK that each was built with.

Why it helps: the two failing tests of that run (test_get_prediction_default_uses_model_offset[nb_offset] on Linux musllinux and Windows, test_zero_collinear on Windows ARM64) depend on rounding in the BLAS library. The architecture field of the log (Haswell or SkylakeX) differed between jobs that passed and failed.

Not changed

• The Pyodide test command and the tests themselves.

Checked

• I ran the command up to the test call in a local environment (Linux, numpy 2.5.4, scipy 1.18.1, threadpoolctl 3.7): it exits normally and lists two OpenBLAS libraries.

Not verified

• The command has not run on GitHub, so the output on Windows (the quoting of the one-line python -c) and on Windows ARM64 is unchecked.

Written with Claude Code (Claude Sonnet 5.5).

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