Add 3.14 Deprecations

[max-muoto]

Add the following deprecations for 3.14:

• pathlib.PurePath.as_uri deprecation.
• pdb.curframe_locals deprecation.
• asyncio.iscoroutinefunction deprecation.
• codecs.open deprecation.
• os.popen and os.spawn* function deprecations.

[JelleZijlstra]

That's confusing, it's the same method. Also, we don't have an override for Path.as_uri, so people will see this deprecation even if they call the method on a Path.

[max-muoto]

Missed the fact that we didn't have an override: 7eccbac

[max-muoto]

Yeah, the exact snippet from the release notes: pathlib.PurePath.as_uri() is deprecated and will be removed in Python 3.19. Use pathlib.Path.as_uri() instead

[max-muoto]

You can also find a runtime warning: https://github.com/python/cpython/blob/e9b647dd30d22cef465972d898a34c4b1bb6615d/Lib/pathlib/__init__.py#L534

[srittau]

It seems that curframe_locals actually does not exist in 3.13, at least according to stubtest. I'm not totally sure what's going on here.

[srittau]

@JelleZijlstra CI fails, at the moment, so we shouldn't merge.

[max-muoto]

@JelleZijlstra@srittau I had to an ignore for curframe_locals as it doesn't always exist at runtime, but CI is passing now.

[srittau]

Looks mostly good, a few final small suggestions below.

[Avasam]

For consideration, in #14074 I'm also unconditionally marking these as deprecated, but @srittau mentionned that

If I understand it correctly, it's sometimes necessary to use this on Python < 3.11, since it supports @coroutine (removed in 3.11), which the inspect version doesn't support.

[max-muoto]

@srittau@Avasam Comments addressed.

[github-actions]

Diff from mypy_primer, showing the effect of this PR on open source code:

aiohttp (https://github.com/aio-libs/aiohttp)
+ aiohttp/worker.py:73:44: error: overload def (func: def (*Any, **Any) -> typing.Coroutine[Any, Any, Any]) -> builtins.bool of function asyncio.coroutines.iscoroutinefunction is deprecated: Deprecated in Python 3.14; use inspect.iscoroutinefunction() instead [deprecated]+ aiohttp/worker.py:73:44: note: See https://mypy.rtfd.io/en/stable/_refs.html#code-deprecated for more info [deprecated]
trio (https://github.com/python-trio/trio)
+ src/trio/_path.py:258: error: Argument 1 to "as_uri" of "Path" has incompatible type "trio._path.Path"; expected "pathlib.Path" [arg-type]