python / cpython

…er (GH-18155)

… library (GH-11583)

Co-Authored-By: Tim Peters <tim.peters@gmail.com>

GH-18118)

* bpo-39421: Fix posible crash in heapq with custom comparison operators

* fixup! bpo-39421: Fix posible crash in heapq with custom comparison operators

* fixup! fixup! bpo-39421: Fix posible crash in heapq with custom comparison operators

* Add three new bytecodes: LIST_TO_TUPLE, LIST_EXTEND, SET_UPDATE. Use them to implement star unpacking expressions.

* Remove four bytecodes BUILD_LIST_UNPACK, BUILD_TUPLE_UNPACK, BUILD_SET_UNPACK and  BUILD_TUPLE_UNPACK_WITH_CALL opcodes as they are now unused.

* Update magic number and dis.rst for new bytecodes.

IDLE does not pass a non-default _synchre in any of its calls to
pyparse.find_good_parse_start.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

`is_tarfile()` now supports `name` being a file or file-like object.

…GH-18131)

https://bugs.python.org/issue39427



Automerge-Triggered-By: @pablogsal

…em (#18006)

* bpo-39336: Allow setattr to fail on modules which aren't assignable

When attaching a child module to a package if the object in sys.modules raises an AttributeError (e.g. because it is immutable) it causes the whole import to fail.  This now allows immutable packages to exist and an ImportWarning is reported and the AttributeError exception is ignored.

…7020) (GH-18117)

When communicate() is called in a loop, it crashes when the child process
has already closed any piped standard stream, but still continues to be running

Co-authored-by: Andriy Maletsky <andriy.maletsky@gmail.com>

If setenv() C function is available, os.putenv() is now implemented
with setenv() instead of putenv(), so Python doesn't have to handle
the environment variable memory.

Windows: _wputenv(env) copies the *env* string and doesn't require
the caller to manage the variable memory.

…-18124)

This reverts commit 56cd371.

Deprecate binhex4 and hexbin4 standards. Deprecate the binhex module
and the following binascii functions:

* b2a_hqx(), a2b_hqx()
* rlecode_hqx(), rledecode_hqx()
* crc_hqx()

https://bugs.python.org/issue39425



Automerge-Triggered-By: @pablogsal

Co-authored-by: Kyle Stanley <aeros167@gmail.com>

….c floatobject.c. (GH-18105)

Rename posix_putenv_garbage to putenv_dict.

The os.unsetenv() function is now also available on Windows.

It is implemented with SetEnvironmentVariableW(name, NULL).

testPerm() and testComb() belong to MathTests, not to IsCloseTests().

test_nextafter() and test_ulp() now use assertIsNaN().

Replace int with intptr_t to fix the warning:

    objects\frameobject.c(341): warning C4244: 'initializing':
    conversion from '__int64' to 'int', possible loss of data

As described in RFC 1952, section 2.3.1, the XFL (eXtra FLags) byte of a
gzip member header should indicate whether the DEFLATE algorithm was
tuned for speed or compression ratio. Prior to this patch, archives
emitted by the `gzip` module always indicated maximum compression.

Move also math.nextafter() on math.ulp() tests from IsCloseTests to
MathTests.

Fix comments and add tests for editor newline_and_indent_event method.
Remove unused None default for function parameter of pyparse find_good_parse_start method
and code triggered by that default.

Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

…H-18054)

Mention that the function implicitly creates new event loop only if called from the main thread.

…H-18052)

)

Update Misc/valgrind-python.supp to suppress the false alarm.