See [PEP 597](https://www.python.org/dev/peps/pep-0597/).
* Add `-X warn_default_encoding` and `PYTHONWARNDEFAULTENCODING`.
* Add EncodingWarning
* Add io.text_encoding()
* open(), TextIOWrapper() emits EncodingWarning when encoding is omitted and warn_default_encoding is enabled.
* _pyio.TextIOWrapper() uses UTF-8 as fallback default encoding used when failed to import locale module. (used during building Python)
* bz2, configparser, gzip, lzma, pathlib, tempfile modules use io.text_encoding().
* What's new entry
It doesn't actually affect whether match_hostname() is called (it
never is in this context any longer), but whether hostname
verification occurs in the first place.
pprint() gains a new boolean underscore_numbers kwarg to emit
integers with thousands separated by an underscore character
for improved readability (for example 1_000_000 instead of 1000000).
* bpo-43428: Sync with importlib_metadata 3.7.3 (16ac3a95)
* Add 'versionadded' for importlib.metadata.packages_distributions
* Add section in what's new for Python 3.10 highlighting most salient changes and relevant backport.
Added an invalidate_caches() method to the zipimport.zipimporter class based on the implementation of importlib.FileFinder.invalidate_caches(). This was done by adding a get_files() method and an _archive_mtime attribute to zipimport.zipimporter to check for updates or cache invalidation whenever the cache of files and toc entry information in the zipimporter is accessed.
The case of tempfile.tempdir variable being bytes is now handled consistently.
The getters return the right type and no more error of mixing str and bytes unless explicitly caused by the user.
Adds a regression test.
Expands the documentation to clarify the behavior.
Co-authored-by: Eric L <ewl+git@lavar.de>
Co-authored-by: Gregory P. Smith <greg@krypto.org>
* bpo-42128: Add documentation for the new match-based AST nodes
* Update Doc/library/ast.rst
Co-authored-by: Carol Willing <carolcode@willingconsulting.com>
* Fix trailing whitespace
Co-authored-by: Carol Willing <carolcode@willingconsulting.com>
The note about the GIL was buried pretty deep in the threading documentation,
and this made it hard for first time users to discover why their attempts
at using threading to parallelizing their application did not work.
In this commit, the note is moved to the top of the module documention for
visibility.
Printing to IDLE's Shell is often slower than printing to a system
terminal, but it can be made faster by pre-formatting a single
string before printing.
Unittest discovery support namespace package as start
directory. But it doesn't find namespace package in
the start directory automatically.
Otherwise, unittest discovery search into unexpected
directories like `vendor/` or `node_modules/`.
Expose the new PyFunctionObject.func_builtins member in Python as a
new __builtins__ attribute on functions.
Document also the behavior change in What's New in Python 3.10.
