8/4/2023 0 Comments Python future annotationsLet's see a simple example using them both. But still, here I want to help clarify all that and give you a bit more context.īrace yourself, you are about to learn a bit more about how Python works, how FastAPI and Pydantic work, how type annotations work, and more. It might have worried you and maybe confuse you a bit. I didn't fully understand it until I spent hours reading all the related content and doing multiple experiments. If you read about it, I wouldn't expect you to understand what all that meant. You might have heard not long ago about PEP 563, PEP 649, and some changes that could affect Pydantic and FastAPI in the future. From the Core Developers making Python itself to the new developers that started learning Python this month.Īnd as long as these tools are helping us all solve problems, help ourselves, help others, and be more efficient and productive, we all will keep them working and improving. This is because we all, as the Python community, define their future. The future of FastAPI and Pydantic is bright. The next pre-release of Python 3.12 will be 3.12.0b4, the last beta release, currently scheduled for. (Hey, fellow core developer, if a feature you find important is missing from this list, let Thomas know.)įor more details on the changes to Python 3.12, see What's new in Python 3.12.(This should not affect most users as it is an internal detail, but it may cause problems for Cython-generated code.) The internal representation of integers has changed in preparation for performance enhancements.(They will become syntax errors in the future.) Invalid backslash escape sequences in strings now warn with SyntaxWarning instead of DeprecationWarning, making them more visible.A number of other old, broken and deprecated functions, classes and methods have been removed.The setuptools package continues to provide the distutils module. The deprecated smtpd and distutils modules have been removed (see PEP 594 and PEP 632.(They had been deprecated since Python 3.1 or 3.2). In the unittest module, a number of long deprecated methods and classes were removed.The deprecated wstr and wstr_length members of the C implementation of unicode objects were removed, per PEP 623.Support for the Linux perf profiler to report Python function names in traces.Many large and small performance improvements (like PEP 709).More exceptions potentially caused by typos now make suggestions to the user. More flexible f-string parsing, allowing many things previously disallowed ( PEP 701).New type annotation syntax for generic classes ( PEP 695).Some of the new major new features and changes in Python 3.12 are: Major new features of the 3.12 series, compared to 3.11 Please keep in mind that this is a preview release and its use is not recommended for production environments. To achieve that, it will be extremely important to get as much exposure for 3.12 as possible during the beta phase. Our goal is to have no ABI changes after beta 4 and as few code changes as possible after 3.12.0rc1, the first release candidate. While the release is planned to be feature complete entering the beta phase, it is possible that features may be modified or, in rare cases, deleted up until the start of the release candidate phase (Monday, ). We strongly encourage maintainers of third-party Python projects to test with 3.12 during the beta phase and report issues found to [the Python bug tracker () as soon as possible. This release, 3.12.0b3, is the third of four beta release previews of 3.12.īeta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support the new feature release. Release Date: JThis is a beta preview of Python 3.12
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