![]() Octal escapes with value larger than 0o377 (ex: "\477"), deprecated (Contributed by Victor Stinner in gh-98401.) In a future Python version, Synta圎rror will eventually be raised, ( "\d" is an invalid escape sequence), use raw strings for regular (Contributed by Pablo Galindo inĪ backslash-character pair that is not a valid escape sequence now generatesĪ SyntaxWarning, instead of DeprecationWarning.įor example, re.compile("\d+\.\d+") now emits a SyntaxWarning Need to run for a long time without executing any Python code also have aĬhance to execute the GC periodically. The GC canĪlso run when PyErr_CheckSignals() is called so C extensions that Python bytecode evaluation loop instead of object allocations. The Garbage Collector now runs only on the eval breaker mechanism of the When parsing source code containing null bytes. (Contributed by Pablo Galindo in gh-96670.)Īst.parse() now raises Synta圎rror instead of ValueError The parser now raises Synta圎rror when parsing source code containing (Contributed by Dong-hee Na and Antoine Pitrou in gh-90751.) Memoryview now supports the half-float type (the “e” format code). (Contributed by Serhiy Storchaka in gh-87995.) Types.MappingProxyType instances are now hashable if the underlying (Contributed by Petr Viktorin in PEP 706.) In Python 3.14, the default will switch to 'data'. Surprising or dangerous, such as creating files outside the destination Have a new a filter argument that allows limiting tar features than may be The extraction methods in tarfile, and shutil.unpack_archive(), Contributed by Pablo Galindo and Christian Heimes Implementation by Jelle Zijlstra, Eric Traut,Īnd others in gh-103764.) Other Language Changes ¶Īdd Python support for the Linux perf profiler through the newĪs well as the new sys.activate_stack_trampoline(),Īnd sys.is_stack_trampoline_active() APIs. In Python 3.13, annotations will also be evaluated in Most part like function scopes, but interact differently with enclosing class scopes. In order to support these scoping semantics, a new kind of scope is introduced, See Type parameter lists for a detailed description of the However, they cannot be used in the module scope after ForĮxample, they can be used in the type annotations for the methods of a genericĬlass or in the class body. Scope of the declaration and any nested scopes, but not in the outer scope. Type parameters declared through a type parameter list are visible within the This means type aliases are able to refer to other The value of type aliases and the bound and constraints of type variablesĬreated through this syntax are evaluated only on demand (see Type IntFunc = Callable # ParamSpec type LabeledTuple = tuple # TypeVarTuple type HashableSequence = Sequence # TypeVar with bound type IntOrStrSequence = Sequence # TypeVar with constraints ![]() This PEP specifies a more precise way of typing **kwargs by relying on Typing **kwargs in a function signature as introduced by PEP 484 allowedįor valid annotations only in cases where all of the **kwargs were of the PEP 692: Using TypedDict for more precise **kwargs typing ¶ This section covers major changes affecting PEP 484 type hints and This means that you only pay for what you use, providing supportįor near-zero overhead debuggers and coverage tools. Returns, lines, exceptions and other events using instrumentation. (Contributed by Eric Snow in gh-104210, etc.) PEP 669: Low impact monitoring for CPython ¶ĬPython 3.12 now supports the ability to monitor calls, Per-interpreter GIL, see Modules/_xxsubinterpretersmodule.c.Ī Python API is anticipated for 3.13. */įor further examples how to use the C-API for sub-interpreters with a > my_string = f " /* The new interpeter is now active in the current thread. Contributed by Pablo Galindo in gh-98254. The error messages displayed by the interpreter when a NameError is Modules from the standard library are now potentially suggested as part of Important deprecations, removals or restrictions: PEP 698: Override Decorator for Static Typing ![]() PEP 692: Using TypedDict for more precise **kwargs typing PEP 688: Making the buffer protocol accessible in Python PEP 669: Low impact monitoring for CPython PEP 701: Syntactic formalization of f-strings So it’s worth checking back even after reading earlier versions. It will be updated substantially as Python 3.12 moves towards release, ![]() Prerelease users should be aware that this document is currently in draftįorm.
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