python / cpython

Python-ast.h contains a macro named Yield that conflicts with the Yield macro
in Windows system headers. While Python-ast.h has an "undef Yield" directive
to prevent this, it means that Python-ast.h must be included before Windows
header files or we run into a re-declaration warning. In commit c96be81
an include for pycore_pystate.h was added which indirectly includes Windows
header files. In this commit we re-order the includes to fix this warning.

On Unix, subprocess.Popen.send_signal() now polls the process status.
Polling reduces the risk of sending a signal to the wrong process if
the process completed, the Popen.returncode attribute is still None,
and the pid has been reassigned (recycled) to a new different
process.

… (PEP 489) (GH-17835)

The function has no return value.

* Add test for nested async decorator patch.
* Add test for side_effect and wraps with a function.
* Add test for side_effect with an exception in the iterable.

Originally suggested by Anthony Shaw.

…nt directory. (GH-17946)

When a prompt value of '.' is specified, os.path.basename(os.getcwd()) is used to
configure the prompt for the created venv.

When using python's built-in venv activaton script
warnings are printed when hashing is disabled in
bash or zsh, like;

`bash: hash: hashing disabled`

This output is not really useful to the end-user and has
been disabled in `virtualenv` for long.

This commit is based on:
pypa/virtualenv@28e85bc

…16557)

The default value of "ident" parameter should be sys.argv[0] with leading path
components stripped, but it contained the last slash, i.e. '/program' instead
of 'program'.

BPO issue: https://bugs.python.org/issue38361


https://bugs.python.org/issue38361

…ed by the gc (GH-17989)

* Reorder the __aenter__ and __aexit__ checks for async with
* Add assertions for async with body being skipped
* Swap __aexit__ and __aenter__ loading in the documentation

…H-17754)

Break up COMPARE_OP into four logically distinct opcodes:
* COMPARE_OP for rich comparisons
* IS_OP for 'is' and 'is not' tests
* CONTAINS_OP for 'in' and 'is not' tests
* JUMP_IF_NOT_EXC_MATCH for checking exceptions in 'try-except' statements.

…lp` (GH-17747)

This isn't included in `__all__` and could be a source of confusion.

_Py_FinishPendingCalls() now expects a tstate argument, instead of a
runtime argument.

This adds a new function named _PyErr_GetExcInfo() that is a variation of the
original PyErr_GetExcInfo() taking a PyThreadState as its first argument.
That function allows to retrieve the exceptions information of any Python
thread -- not only the current one.

* Add tests for case insensitive check of types and extensions as fallback.
* Add tests for data url with no comma.
* Add tests for read_mime_types.
* Add tests for the mimetypes cli and refactor __main__ code to private function.
* Restore mimetypes.knownfiles value at the end of the test.

The sys.argv[0] change has been reverted.

Add math.ulp(): return the value of the least significant bit
of a float.

Add support for brotli encoding in the encoding_map.

…ion (GH-17967)

https://bugs.python.org/issue39313


Automerge-Triggered-By: @pablogsal

Can I please get the tags for skipping bpo and skipping a news item?

…n the AST docs (GH-17172)

Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>

Copying property objects results in a TypeError. Steps to reproduce:

```
>>> import copy
>>> obj = property()
>>> copy.copy(obj)
````

This affects both shallow and deep copying.  
My idea for a fix is to add property objects to the list of "atomic" objects in the copy module.
These already include types like functions and type objects.

I also added property objects to the unit tests test_copy_atomic and test_deepcopy_atomic. This is my first PR, and it's highly likely I've made some mistake, so please be kind :)


https://bugs.python.org/issue38293