Co-authored-by: Russell Keith-Magee <russell@keith-magee.com>
Co-authored-by: T. Wouters <thomas@python.org>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>
The code changes for warning related to `__package__` landed in Python 3.12. `__cached__` doesn't have any changes as it isn't used but only set by the import system.
We don't want to add another API, since the recipe is straightforward and rarely needed.
The advantage is that we could backport this to the earliest Python version that has taskgroups (3.11, alas in security mode already, so we'll just do 3.12 and 3.13).
Update TOML description to include version number
There is some movement, currently blocked, that would update the TOML spec to 1.1.0; this would include breaking changes to what characters are allowed. Thus, it is worthwhile for the library page to be clear which version is implemented here.
Co-authored-by: Paul Hoffman <phoffman@proper.com>
Remove *ignore* and *on_error* arguments from `pathlib.Path.copy[_into]()`,
because these arguments are under-designed. Specifically:
- *ignore* is appropriated from `shutil.copytree()`, but it's not clear
how it should apply when the user copies a non-directory. We've changed
the callback signature from the `shutil` version, but I'm not confident
the new signature is as good as it can be.
- *on_error* is a generalisation of `shutil.copytree()`'s error handling,
which is to accumulate exceptions and raise a single `shutil.Error` at
the end. It's not obvious which solution is better.
Additionally, this arguments may be challenging to implement in future user
subclasses of `PathBase`, which might utilise a native recursive copying
method.
Per feedback from Paul Moore on GH-123158, it's better to defer making
`Path.delete()` public than ship it with under-designed error handling
capabilities.
We leave a remnant `_delete()` method, which is used by `move()`. Any
functionality not needed by `move()` is deleted.
These two methods accept an *existing* directory path, onto which we join
the source path's base name to form the final target path.
A possible alternative implementation is to check for directories in
`copy()` and `move()` and adjust the target path, which is done in several
`shutil` functions. This behaviour is helpful in a shell context, but
less so in a stored program that explicitly specifies destinations. For
example, a user that calls `Path('foo.py').copy('bar.py')` might not
imagine that `bar.py/foo.py` would be created, but under the alternative
implementation this will happen if `bar.py` is an existing directory.
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