cameraose.blogg.se - Install python 3.8 ubuntu

The syntax allowed for keyword names in function calls was further restricted.

(Contributed by Rémi Lapeyre in bpo-33462.)

Dict and dictviews are now iterable in reversed insertion order using reversed().

(Contributed by Jonathan Eunice and Serhiy Storchaka in bpo-30688.)

On Unix, when Python is built in debug mode, import now also looks for C extensions compiled in release mode and for C extensions compiled with the stable ABI.į-strings now support = for quick and easy debugging – Add = specifier to f-strings.

(Contributed by Victor Stinner in bpo-21536.) It is now possible for a statically linked Python to load a C extension built using a shared library Python.

On Unix, C extensions are no longer linked to libpython except on Android and Cygwin.

Release builds and debug builds are now ABI compatible.

On Unix, when Python is built in debug mode, it is now possible to load C extensions built in release mode and C extensions built using the stable ABI. Debug build uses the same ABI as release build – Python now uses the same ABI whether it built in release or debug mode.The location of the cache is reported in sys.pycache_prefix (None indicates the default location in _pycache_ subdirectories).

Parallel filesystem cache for compiled bytecode files – The new PYTHONPYCACHEPREFIX setting (also available as -X pycache_prefix) configures the implicit bytecode cache to use a separate parallel filesystem tree, rather than the default _pycache_ subdirectories within each source directory.This is the same notation as shown by help() for functions implemented in C (produced by Larry Hastings’ “Argument Clinic” tool). Positional-only parameters – There is new syntax (/) to indicate that some function parameters must be specified positionally (i.e., cannot be used as keyword arguments).Assignment expressions – There is new syntax (the “walrus operator”, :=) to assign values to variables as part of an expression.The new features in Python 3.8, compared to 3.7. Python is developed under an OSI-approved open source license, making it freely usable and distributable, even for commercial use.