* Replace _PyCoreConfig.preconfig with 3 new fields in _PyCoreConfig:
  isolated, use_environment, dev_mode.
* Add _PyPreCmdline.dev_mode.
* Add _Py_PreInitializeFromPreConfigInPlace().

* Make _PyPreConfig_GetEnv(), _PyCoreConfig_GetEnv() and
  _PyCoreConfig_GetEnvDup() private
* _Py_get_env_flag() first parameter becomes "int use_environment"

* bpo-34085: Improve wording on classmethod/staticmethod

* Address comments from Éric

* Address comments from Éric

* Add _Py_GetConfigsAsDict() function to get all configurations as a
  dict.
* dump_config() of _testembed.c now dumps preconfig as a separated
  key: call _Py_GetConfigsAsDict().
* Make _PyMainInterpreterConfig_AsDict() private.

Now that the parser generator is written in Python (Parser/pgen) we can make use of it to regenerate the Lib/keyword file that contains the language keywords instead of parsing the autogenerated grammar files. This also allows checking in the CI that the autogenerated files are up to date.

* Initialize _PyPreConfig.dev_mode to -1.
* _PyPreConfig_Read(): coreconfig has the priority over preconfig.
* _PyCoreConfig_Read() now calls _PyPreCmdline_Read() internally.
* config_from_cmdline() now pass _PyPreCmdline to config_read().
* Add _PyPreCmdline_Copy().

Prepare code to move some _PyPreConfig parameters into _PyPreCmdline.
Changes:

* _PyCoreConfig_ReadFromArgv(): remove preconfig parameter,
  use _PyRuntime.preconfig.
* Add _PyPreCmdline_GetPreConfig() (called by _PyPreConfig_Read()).
* Rename _PyPreCmdline_Init() to _PyPreCmdline_SetArgv()
* Factorize _Py_PreInitializeFromPreConfig() code: add
  pyinit_preinit().
* _PyPreConfig_Read() now sets coerce_c_locale to 2 if it must be
  coerced.
* Remove _PyCoreConfig_ReadPreConfig().
* _PyCoreConfig_Write() now copies updated preconfig into _PyRuntime.

bpo-35884: Add string-keys-only microbenchmark for dict access to var_access_benchmark.py (GH-11905)

Set type_attr to NULL after the assignment to stgdict->proto (like
what is done with stgdict after the Py_SETREF() call) so that it is
not decrefed twice on error.

Fix error in commit 2b751555 noticed by Serhiy Storchaka.

Check for sys.abiflags before using since not all platforms have it defined.

We will remove int support from 3.10 or 4.0.

* Add tests for grep findfiles.
* Move findfiles to module function.
* Change findfiles to use os.walk.

Based on a patch by Al Sweigart.

_PyPreConfig_Write() now writes the applied pre-configuration into
_PyRuntimeState.preconfig.

Remove now unneeded imports.

Clarify capturing or suppressing stdout and stderr on the old call APIs.

Do not state that they are equivalent to run() calls when they are not implemented using run as that was misleading. Unlike run they cannot handle stdout or stderr being set to PIPE without a risk of deadlock.

This param was only used once and changed the return type.

Before, an `AttributeError` was raised due to trying to access an attribute that exists on specs but having received `None` instead for a non-existent module.


https://bugs.python.org/issue36298

Clarify that the naming of protocol handler methods shouldn't be literally called "protocol" but should be named after the actual protocol.



https://bugs.python.org/issue35155

`Task.current_task()` and `Task.all_tasks()` will be removed in 3.9.

compiler_call() needs to check if an error occurred during the
maybe_optimize_method_call() call.

If the first PyUnicode_DecodeUTF8() call fails in structseq_repr(),
_PyUnicodeWriter_Dealloc() will be called on an uninitialized
_PyUnicodeWriter.