Name already in use

`IPV4_RE` includes a `.`, and the `.find(".") == -1` included here is already testing to make sure there's no dot, so this part of the expression is tautological. Instead use more modern `in` syntax to make it clear what the check is doing here. The simplified implementation more clearly matches the wording in RFC 2965.

Co-authored-by: hauntsaninja <hauntsaninja@gmail.com>

…100473)

Minor formatting fix in documentation

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

Previously, the grammar did not accept `float("10")`.
Also implement mdickinson's suggestion of removing the indirection.

…ation (#99990)

…00475)

If you had a directory called index.html or index.htm within a directory, it would cause http.server to return a 404 Not Found error instead of the directory listing. This came about due to not checking that the index was a regular file.

I have also added a test case for this situation.

Automerge-Triggered-By: GH:merwok

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

… asyncio (#31871)

Co-authored-by: Guido van Rossum <gvanrossum@gmail.com>

… asyncio (#31871)

Co-authored-by: Guido van Rossum <gvanrossum@gmail.com>

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

This improves the lives of type annotation users of `float` - which type checkers implicitly treat as `int|float` because that is what most code actually wants. Before this change a `.is_integer()` method could not be assumed to exist on things annotated as `: float` due to the method not existing on both types.

…H-100480)

… import (GH-99946)

…-31691)

Users may wish to define subclasses of `pathlib.Path` to add or modify
existing methods. Before this change, attempting to instantiate a subclass
raised an exception like:

    AttributeError: type object 'PPath' has no attribute '_flavour'

Previously the `_flavour` attribute was assigned as follows:

    PurePath._flavour        = xxx not set!! xxx
    PurePosixPath._flavour   = _PosixFlavour()
    PureWindowsPath._flavour = _WindowsFlavour()

This change replaces it with a `_pathmod` attribute, set as follows:

    PurePath._pathmod        = os.path
    PurePosixPath._pathmod   = posixpath
    PureWindowsPath._pathmod = ntpath

Functionality from `_PosixFlavour` and `_WindowsFlavour` is moved into
`PurePath` as underscored-prefixed classmethods. Flavours are removed.

Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>
Co-authored-by: Brett Cannon <brett@python.org>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
Co-authored-by: Eryk Sun <eryksun@gmail.com>

)

…19883)

Signed-off-by: Filipe Laíns <lains@archlinux.org>
Signed-off-by: Filipe Laíns <lains@riseup.net>
Co-authored-by: Irit Katriel <1055913+iritkatriel@users.noreply.github.com>
Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>

…99484)

* Uses a better hashing algorithm to get better dispersion and remove commutativity.

* Incorporates `co_firstlineno`, `Py_SIZE(co)`, and bytecode instructions.

* This is now the entire set of criteria used in `code_richcompare`, except for `_PyCode_ConstantKey` (which would incorporate the types of `co_consts` rather than just their values).

…es (GH-100289)" (#100468)

This reverts commit c3c7848.

…00289)

…sing docs (#98710)

…ion fault when accessing `frame.f_back` (#100182)

…H-5576)

The itemsize returned in a memoryview of a ctypes array is now computed from the item type, instead of dividing the total size by the length and assuming that the length is not zero.

…rence (#93068)