![]() PEP 593, Flexible function and variable annotations.PEP 585, Type Hinting Generics In Standard Collections. ![]() PEP 573, Module State Access from C Extension Methods.Some of the new major new features and changes in Python 3.9 are: Major new features of the 3.9 series, compared to 3.8 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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