Previous topic What’s New In Python 3. Next topic What’s New In Python 3. This article explains the new features in Lift others up 3. 7 was released on June 27, 2018.

New documentation translations: Japanese, French, and Korean. This release features notable performance improvements in many areas. For a list of changes that may affect compatibility with previous Python releases please refer to the Porting to Python 3. Both of these issues are fixed by postponing the evaluation of annotations. Instead of compiling code which executes expressions in annotations at their definition time, the compiler stores the annotation in a string form equivalent to the AST of the expression in question. Since this change breaks compatibility, the new behavior needs to be enabled on a per-module basis in Python 3. It will become the default in Python 3.

Postponed evaluation of annotationsPEP written and implemented by Łukasz Langa. C or POSIX locale on non-Windows platforms. UTF-8 as the default text encoding, rather than ASCII. PEP 11 has also been updated to limit full text handling support to suitably configured non-ASCII based locales.

This setting will also cause the Python runtime to emit a warning if the legacy C locale remains active when the core interpreter is initialized. Coercing the legacy C locale to a UTF-8 based localePEP written and implemented by Nick Coghlan. When in UTF-8 mode, CPython ignores the locale settings, and uses the UTF-8 encoding by default. The forced UTF-8 mode can be used to change the text handling behavior in an embedded Python interpreter without changing the locale settings of an embedding application. Python applications, and child processes running older versions of Python. To reduce the risk of corrupting text data when communicating with such components, Python 3.

This has not generally been a problem for officially support platforms, but that is neither POSIX-compliant, nor portable in any practical sense. CPython which supersedes use of the existing TLS API within the CPython interpreter, while deprecating the existing API. TLS API will be no-op and immediately return failure. This indicates clearly that the old API is not supported on platforms where it cannot be used reliably, and that no effort will be made to add such support. A New C-API for Thread-Local Storage in CPythonPEP written by Erik M. A typical example of where this may be useful is module attribute deprecation and lazy loading. The resolution of clocks in modern systems can exceed the limited precision of a floating point number returned by the time.