![]() ![]() 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).PEP 574, Pickle protocol 5 with out-of-band data.PEP 590, Vectorcall: a fast calling protocol for CPython.PEP 587, Python Initialization Configuration (improved embedding).Major new features of the 3.8 series, compared to 3.7 bpo-43439: Add audit hooks for gc.get_objects(), gc.get_referrers() and gc.get_referents().Code that requires the former vulnerable behavior may set a trust_server_pasv_ipv4_address attribute on their ftplib.FTP instances to True to re-enable it. This prevents a malicious FTP server from using the response to probe IPv4 address and port combinations on the client network. bpo-43285: ftplib no longer trusts the IP address value returned from the server in response to the PASV command by default.Vulnerability reported by David Schwörer. ![]() Moreover, even source code of Python modules can contain sensitive data like passwords. ![]()
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