python / cpython

…s to fail to start. (GH-21201)

* Add to the peg generator a new directive ('&&') that allows to expect
  a token and hard fail the parsing if the token is not found. This
  allows to quickly emmit syntax errors for missing tokens.

* Use the new grammar element to hard-fail if the ':' is missing before
  suites.

…-24417)

* Prevents elimination of the sole test of a value in statements like:
   if x or True: ...

* bpo-41748: Adds tests for unquoted attributes with comma

* bpo-41748: Handles unquoted attributes with comma

* bpo-41748: Addresses review comments

* bpo-41748: Addresses review comments

* Adds more test cases
* Simplifies the regex for handling spaces

* bpo-41748: Moves attributes tests under the right class

* bpo-41748: Addresses review about duplicate attributes

* bpo-41748: Adds NEWS.d entry for this patch

For back-compatibility, make the new constructor parameter for public classes Function and Class
keyword-only with a default of None.

Co-authored-by: Aviral Srivastava <aviralsrivastava@Avirals-MacBook-Air.local
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>

Make internal caches of the _json extension module
compatible with subinterpreters.

* Further refactoring of PyEval_EvalCode and friends. Break into make-frame, and eval-frame parts.

* Simplify function vector call using new _PyEval_Vector.

* Remove unused internal functions: _PyEval_EvalCodeWithName and _PyEval_EvalCode.

* Don't use legacy function PyEval_EvalCodeEx.

…a string (GH-24341)

* bpo-42504: Ensure that get_config_var('MACOSX_DEPLOYMENT_TARGET') is a string

…H-24383)

…hensions (GH24314)

…with newlines (GH-24279)

…tr when set_panel_usertpr fails (GH-21933)

… wchar_t (GH-24350)

Improvements:

- Improvements in how try clause works section
  This suggestion is because the execution continues after *except*, not after *try* but before *except*. I guess this form more clear.

- Surrounding some keywords with \*...\*
  For uniformity the highlighted terms  

- Adjust the number of chars per line to 80

…-24364)

…24386)

Update bundled pip to 21.0.1 and setuptools to 52.0.0

GH-24384)

The documentation for some parts of the logging.config formatters has
fallen behind the code.  For example, the dictionary-schema section
does not list the "class" attribute, however it is discussed in the
file/ini discussion; and neither references the style argument which
has been added.

This modifies the dictionary-schema formatters documentation to list
the keys available and overall makes it clearer these are passed to
create a logging.Formatter object.

The logging.Formatter documentation describes the default values of
format/datefmt and the various formatting options.  Since we have now
more clearly described how the configuration is created via this type
of object, we remove the discussion in this document to avoid
duplication and rely on users reading the referenced logging.Formatter
documenation directly for such details.

Instead of duplicating the discussion for the two config types, the
file/ini section is modified to link back to the dictionary-schema
discussion, making it clear the same arguments are accepted.

Automerge-Triggered-By: GH:vsajip

* Replace Py_FatalError() calls with regular SystemError exceptions.
* compiler_exit_scope() calls _PyErr_WriteUnraisableMsg() to log the
  PySequence_DelItem() failure.
* compiler_unit_check() uses _PyMem_IsPtrFreed().
* compiler_make_closure(): remove "(reftype == FREE)" comment since
  reftype can also be LOCAL or GLOBAL_EXPLICIT.

math_nextafter_impl() must return a Python object, not a C double.

…H-24355)

Automerge-Triggered-By: GH:JulienPalard

Found it while translating it to french 🤷

Automerge-Triggered-By: GH:JulienPalard

When Python is built in debug mode (with C assertions), calling a
type slot like sq_length (__len__() in Python) now fails with a fatal
error if the slot succeeded with an exception set, or failed with no
exception set. The error message contains the slot, the type name,
and the current exception (if an exception is set).

* Check the result of all slots using _Py_CheckSlotResult().
* No longer pass op_name to ternary_op() in release mode.
* Replace operator with dunder Python method name in error messages.
  For example, replace "*" with "__mul__".
* Fix compiler_exit_scope() when an exception is set.
* Fix bytearray.extend() when an exception is set: don't call
  bytearray_setslice() with an exception set.

…yEval_CodeEval and friends (GH-24298)

* Introduce 'frame constructor' to simplify API for frame creation

* Embed struct using a macro to conform to PEP 7

Starting stack viewer when user code is running, including when Debugger is active, hangs or crashes IDLE.

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