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Here's a new and better patch. This patch keeps the regrtest_run global in support and moves the regrtest-or-not check into is_resource_enabled to make is_resource_enabled, requires, and requires_resource consistent with each other and in a way that still allows explicitly setting support.use_resources. The real change is confined to Lib/test/regrtest.py and Lib/test/support/__init__.py, the rest of the patch is cleanup allowed by the change (except for test_decimal, which has a minor change required to allow one of the command line options to that script to work).