BUG: move reduction initialization to ufunc initialization #28131
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* BUG: move reduction initialization to ufunc initialization * MAINT: refactor to call get_initial_from_ufunc during init * TST: add test for multithreaded reductions * MAINT: fix linter * Apply suggestions from code review Co-authored-by: Sebastian Berg <sebastian@sipsolutions.net> * MAINT: simplify further --------- Co-authored-by: Sebastian Berg <sebastian@sipsolutions.net>
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Backport of #28123.
Fixes #28041.
Because the reduction initialization happens during ufunc initialization, this means that ufunc initialization now depends on the allocator context variables being initialized, so I moved those initialization steps up before ufunc initialization in the main
_multiarray_umathmodule initialization function.BUG: move reduction initialization to ufunc initialization
MAINT: refactor to call get_initial_from_ufunc during init
TST: add test for multithreaded reductions
MAINT: fix linter
Apply suggestions from code review
MAINT: simplify further