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Python slithers faster by adding lazy imports that load code after startup

PEP 810 approved following lengthy debate among developer community Python programs are set to get faster startup times with ...
GitHub

Python 3.13 breaks circular imports through single-phase extension modules using non-isolated subinterpreters

The easiest way to see the carnage in action is to run it under gdb and break on PyInit__multiarray_umath. You'll see it gets called twice, the second time reentrantly (with a 276-frame backtrace ...