There are many other interesting changes, please consult the "What's New" page in the documentation for a full list. pickle now uses Protocol 4 by default, improving performance.multiprocessing can now use shared memory segments to avoid pickling costs between processes.on macOS, the spawn start method is now used by default in multiprocessing.on Windows, the default asyncio event loop is now ProactorEventLoop.continue is now legal in finally: blocks.f-strings support a handy = specifier for debugging.Debug builds share ABI as release builds.Parallel filesystem cache for compiled bytecode.Typing-related: PEP 591 (Final qualifier), PEP 586 (Literal types), and PEP 589 (TypedDict).
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