Since the n==1 case just returns *max*, it cannot be larger
than the magnitude of the vector entry.

1) Convert weird field name "typ" to the more standard "type".
2) For the NUMBER type, convert the value to an int() or float().
3) Simplify ``group(kind)`` to the shorter and faster ``group()`` call.
4) Simplify logic go a single if-elif chain to make this easier to extend.
5) Reorder the tests to match the order the tokens are specified.
   This isn't necessary for correctness but does make the example
   easier to follow.
6) Move the "column" calculation before the if-elif chain so that
   users have the option of using this value in error messages.

…H-10429)

Gives approx 20% speed-up using clang depending on the number of elements in the set (the less dense the set, the more the speed-up).

Uses the same entry++ logic used elsewhere in the setobject.c code.

Currently, the *n* and *total* variables get converted to floats each time they are multiplied by random().  This minor tweak does the conversion just once and gets a small speedup (approx 3%).

* All internal header files now require Py_BUILD_CORE or
  Py_BUILD_CORE_BUILTIN to be defined.
* _json.c is now compiled with Py_BUILD_CORE_BUILTIN to access
  pycore_accu.h header.
* Add an example to Modules/Setup to show how to build _json
  as a built-in module; it requires non trivial compiler options.

* _PyTuple_ITEMS() gives access to the tuple->ob_item field and cast the
  first argument to PyTupleObject*. This internal macro is only usable if
  Py_BUILD_CORE is defined.
* Replace &PyTuple_GET_ITEM(ob, 0) with _PyTuple_ITEMS(ob).
* Replace PyTuple_GET_ITEM(op, 1) with &_PyTuple_ITEMS(ob)[1].

Co-Authored-By: maggyero <gery.ogam@gmail.com>

This also makes it consistent with other places like:

- https://docs.python.org/dev/copyright.html
- https://www.python.org/ footer
- https://github.com/python/cpython/blob/e42b705188271da108de42b55d9344642170aa2b/Python/getcopyright.c#L7

The System Preferences Dock "prefer tabs always" setting disables some
IDLE features.  Menus are a bit different than as described for Windows
and Linux.

…pythonGH-7252)

https://bugs.python.org/issue33699

Remove unneeded assertion (we already know so is a PySetObject *).

…_range(). (pythonGH-10442)

This function may access memory which is mapped but is considered
free by libc allocator. It behaves so by design, therefore we
need to suppress sanitizer reports.

GCC doesn't support MSan, so disable only TSan for it.

* ast.h now includes Python-ast.h and node.h
* parsetok.h now includes node.h and grammar.h
* symtable.h now includes Python-ast.h
* Modify asdl_c.py to enhance Python-ast.h:

  * Add #ifndef/#define Py_PYTHON_AST_H to be able to include the header
    twice
  * Add "extern { ... }" for C++
  * Undefine "Yield" macro conflicting with winbase.h

* Remove "#undef Yield" from C files, it's now done in Python-ast.h
* Remove now useless includes in C files

The documentation was not covering multiple targets enclosed by
parenthesis nor multiple targets enclosed by brackets, adding them all
would be heavy, an else cover them all and is lighter to read.

…honGH-10337)

* universal_newlines defaulting to False would suggest, that not
  specifying universal_newlines explicitly and setting text to True
  should cause an error, which is not the case.
* The run function didn't have the universal_newlines parameter
  documented
* The check_output function didn't have its text parameter documented

Independently of -> Independent of

Rename Include/internal/ headers:

* pycore_hash.h -> pycore_pyhash.h
* pycore_lifecycle.h -> pycore_pylifecycle.h
* pycore_mem.h -> pycore_pymem.h
* pycore_state.h -> pycore_pystate.h

Add missing headers to Makefile.pre.in and PCbuild:

* pycore_condvar.h.
* pycore_hamt.h
* pycore_pyhash.h

a asynchronous generator -> an asynchronous generator

Adds configure flags for msan and ubsan builds to make it easier to enable.
These also encode the detail that address sanitizer and memory sanitizer
should disable pymalloc.

Define MEMORY_SANITIZER when appropriate at build time and adds workarounds
to existing code to mark things as initialized where the sanitizer is otherwise unable to
determine that.  This lets our build succeed under the memory sanitizer.  not all tests
pass without sanitizer failures yet but we're in pretty good shape after this.

The warnings module now suggests to enable tracemalloc if the source
is specified, tracemalloc module is available, but tracemalloc is not
tracing memory allocations.

clang's MemorySanitizer understand getc() but does not understand
getc_unlocked().  Workaround: Don't use it on msan builds.

pythonGH-11047)

This speeds up pickling of some iterators.

This fixes also error handling in pickling methods when fail to
look up builtin "getattr".

…11077)

* bpo-35454: Fix miscellaneous minor issues in error handling.

* Fix a null pointer dereference.

The following test fails if a different process creates or removes
a file on the same disk partition between the two lines:

    usage = shutil.disk_usage(os.path.dirname(__file__))
    self.assertEqual(usage, shutil.disk_usage(__file__))

Only test that disk_usage() succeed on a filename, but don't check
the result. Add also tests on the fields type (must be int).

…rkserver on Windows (pythonGH-11086)

Forkserver and fork are not available on Windows and therefore these test must be skipped.

…onGH-11087)

The test only except SIGUSR1Exception inside wait_signal(), but the signal can be sent during subprocess_send_signal() call.