Fixed a leak when the garbage collector fails to add an object with the
__del__ method or referenced by it into the :data:`gc.garbage` list.
:c:func:`PyGC_Collect` can now be called when an exception is set and
preserves it.
Fix module_globals parameter of warnings.warn_explicit(): don't crash if module_globals is not a dict.
The new os.posix_spawn added in 3.7.0b1 was removed as we are still working on what the API should look like. Expect this in 3.8 instead.
Fixed miscellaneous bugs in converting annotations to strings and optimized parentheses in the string representation.
Fix a leak in set_symmetric_difference().
Fix unaligned accesses in siphash24(). Patch by Rolf Eike Beer.
Due to unexpected compatibility issues discovered during downstream beta
testing, reverted :issue:`29463`. docstring field is removed from
Module, ClassDef, FunctionDef, and AsyncFunctionDef ast nodes which was
added in 3.7a1. Docstring expression is restored as a first statement in
their body. Based on patch by Inada Naoki.
Fix a crash in ctypes.cast() in case the type argument is a ctypes structured data type. Patch by Eryk Sun and Oren Milman.
When cancelling the task due to a timeout, :meth:`asyncio.wait_for` will now wait until the cancellation is complete.
Fix gather to propagate cancellation of itself even with return_exceptions.
Support protocol type switching in SSLTransport.set_protocol().
Pause the transport as early as possible to further reduce the risk of data_received() being called before connection_made().
Fix a race condition in SSLProtocol.connection_made() of asyncio.sslproto: start immediately the handshake instead of using call_soon(). Previously, data_received() could be called before the handshake started, causing the handshake to hang or fail.
Fixed bug where calling write_eof() on a _SelectorSocketTransport after it's already closed raises AttributeError.
Make asyncio.all_tasks() return only pending tasks.
Avoid blocking on file IO in sendfile fallback code
Fix RuntimeError after closing loop that used run_in_executor
Fix Task.__repr__ crash with Cython's bogus coroutines
Fix transport.set_protocol() to support switching between asyncio.Protocol and asyncio.BufferedProtocol. Fix loop.start_tls() to work with asyncio.BufferedProtocols.
Pickles of type variables and subscripted generics are now future-proof and compatible with older Python versions.
Fixed :func:`uuid.uuid1` on FreeBSD.
Finalize and document preliminary and experimental TLS 1.3 support with OpenSSL 1.1.1
Fix possible SIGSGV when asyncio.Future is created in __del__
Fixed a bug in the Python implementation of the JSON decoder that prevented the cache of parsed strings from clearing after finishing the decoding. Based on patch by c-fos.
Change TLS 1.3 cipher suite settings for compatibility with OpenSSL 1.1.1-pre6 and newer. OpenSSL 1.1.1 will have TLS 1.3 ciphers enabled by default.
Do not simplify arguments to typing.Union. Now Union[Manager, Employee] is not simplified to Employee at runtime. Such simplification previously caused several bugs and limited possibilities for introspection.
Add a new block_on_close class attribute to ForkingMixIn and
ThreadingMixIn classes of :mod:`socketserver`.
tempfile._candidate_tempdir_list should consider common TEMP locations
argparse subparsers are once again not required by default, reverting the change in behavior introduced by bpo-26510 in 3.7.0a2.
dataclasses.make_dataclass now checks for invalid field names and duplicate fields. Also, added a check for invalid field specifications.
Prevent uuid.get_node from using a DUID instead of a MAC on Windows.
Patch by Zvi Effron
Fix race condition with ReadTransport.resume_reading in Windows proactor event loop.
Fix failure in typing.get_type_hints() when ClassVar was provided as a string forward reference.
Optimize asyncio.ensure_future() by reordering if checks: 1.17x faster.
Add errors param to cgi.parse_multipart and make an encoding in FieldStorage use the given errors (needed for Twisted). Patch by Amber Brown.
Change dataclasses.Fields repr to use the repr of each of its members, instead of str. This makes it more clear what each field actually represents. This is especially true for the 'type' member.
Fix dataclasses to work if using literal string type annotations or if using PEP 563 "Postponed Evaluation of Annotations". Only specific string prefixes are detected for both ClassVar ("ClassVar" and "typing.ClassVar") and InitVar ("InitVar" and "dataclasses.InitVar").
Minor fixes in typing module: add annotations to NamedTuple.__new__,
pass *args and **kwds in Generic.__new__. Original PRs by
Paulius Šarka and Chad Dombrova.
Updated alias mapping with glibc 2.27 supported locales.
Fix trailing quotation marks getting deleted when looking up byte/string literals on pydoc. Patch by Andrés Delfino.
The function platform.linux_distribution and platform.dist now
trigger a DeprecationWarning and have been marked for removal in Python
3.8
Update error message when constructing invalid inspect.Parameters Patch by Dong-hee Na.
Fix FD leak in _SelectorSocketTransport Patch by Vlad Starostin.
The urllib.robotparser's __str__ representation now includes wildcard
entries and the "Crawl-delay" and "Request-rate" fields. Patch by Michael
Lazar.
The ssl module now contains OP_NO_RENEGOTIATION constant, available with OpenSSL 1.1.0h or 1.1.1.
Support arrays >=2GiB in :mod:`ctypes`. Patch by Segev Finer.
Document that asyncio.wait() does not cancel its futures on timeout.
Document PEP 567 changes to asyncio.
Update HMAC md5 default to a DeprecationWarning, bump removal to 3.8.
Fix broken pypi link
Add missing documentation for typing.AsyncContextManager.
Ignore test_posix_fallocate failures on BSD platforms that might be due to running on ZFS.
Remove the _xxsubinterpreters module (meant for testing) and associated helpers. This module was originally added recently in 3.7b1.
Ensures module definition files for the stable ABI on Windows are correctly regenerated.
Enable CI builds on Visual Studio Team Services at https://python.visualstudio.com/cpython
Add -Wno-cast-function-type for gcc 8 for silencing warnings about
function casts like casting to PyCFunction in method definition lists.
The .editrc file in user's home directory is now processed correctly during the readline initialization through editline emulation on macOS.
IDLE: Cleanup codecontext.py and its test.
IDLE's code context now recognizes async as a block opener.
Add docstrings and tests for codecontext.