2947: change PyModule::add_class to return an error if class creation fails r=adamreichold a=davidhewitt
Related to #2942
At the moment there are panics deep in the `#[pyclass]` machinery when initialising the type fails. This PR adjusts a number of these functions to return `PyResult` instead, so that we can handle the error more appropriately further down the pipeline.
For example, take the following snippet:
```rust
#[pyclass(extends = PyBool)]
struct ExtendsBool;
#[pymodule]
fn pyo3_scratch(_py: Python, m: &PyModule) -> PyResult<()> {
m.add_class::<ExtendsBool>()?;
Ok(())
}
```
Currently, importing this module will fail with a panic:
```
TypeError: type 'bool' is not an acceptable base type
thread '<unnamed>' panicked at 'An error occurred while initializing class ExtendsBool', /Users/david/Dev/pyo3/src/pyclass.rs:412:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Users/david/.virtualenvs/pyo3/lib/python3.10/site-packages/pyo3_scratch/__init__.py", line 1, in <module>
from .pyo3_scratch import *
pyo3_runtime.PanicException: An error occurred while initializing class ExtendsBool
```
After this PR, this import still fails, but with a slightly cleaner, more Pythonic error:
```
TypeError: type 'bool' is not an acceptable base type
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/Users/david/.virtualenvs/pyo3/lib/python3.10/site-packages/pyo3_scratch/__init__.py", line 1, in <module>
from .pyo3_scratch import *
RuntimeError: An error occurred while initializing class ExtendsBool
```
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
Co-authored-by: Adam Reichold <adam.reichold@t-online.de>
2944: optimize sequence conversion for list and tuple r=adamreichold a=davidhewitt
closes#2943
Avoid using `PyObject_IsInstance` for checking if lists or tuples are sequences, as we know they are always sequences.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2914: correct ffi definition of PyIter_Check r=davidhewitt a=davidhewitt
Closes#2913
It looks like what is happening is that PyO3 was relying on an outdated macro form of `PyIter_Check` which is now a CPython implementation detail, which would explain why it was behaving inconsistently on different platforms (likely due to differences in linkers / implementations).
The test I've pushed succeeds, but fails to compile due to a hygiene bug! I'm done for tonight so I'll take a look at that soon and then rebase this after.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2912: Add `PyDict.update()` and `PyDict.update_if_missing()` r=davidhewitt a=samuelcolvin
Fix#2910
Note, I'd also be happy to remove the `override_` argument from merge and perhaps rename it to `update_missing` or similar to give a cleaner API. LMK what you think.
Please consider adding the following to your pull request:
- [x] an entry for this PR in newsfragments
- [x] docs to all new functions and / or detail in the guide
- [x] tests for all new or changed functions
Co-authored-by: Samuel Colvin <s@muelcolvin.com>
2923: hygiene: fix `#[pymethods(crate = "...")]` r=davidhewitt a=davidhewitt
Got to the bottom of the hygiene issue in test of #2914
Turns out that `#[pymethods] #[pyo3(crate = "...")]` works, but `#[pymethods(crate = "...")]` was ignoring the argument.
Added a tweak to fix this and a snippet in the hygiene test (which fails on `main`).
2924: remove unneeded into_iter calls r=davidhewitt a=davidhewitt
Clippy complaining about these to me this morning locally.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2904: refactor docstring generation code r=mejrs a=davidhewitt
As a first step towards #2866 this is a tweak to the macro code which generates Python docstrings. This PR refactors the behaviour so that instead of always creating a `concat!` expression to generate a nul-terminated string, this will only happen if a Rust 1.54+ macro doc is present (e.g. `#[doc = include_str!(...)]`).
The default case now just collects all the `#[doc]` attributes into a single string.
This should make it easier to factor out the `text_signature` formatting, and avoids wasting compile time invoking the `concat!` macro when not necessary.
2921: Check to see if object is `None` before traversing r=davidhewitt a=neachdainn
Closes#2915
When using the C API directly, the intended way to call `visitproc` is via the `Py_VISIT` macro, which checks to see that the provided pointer is not null before passing it along to `visitproc`. Because PyO3 isn't using the macro, it needs to manually check that the pointer isn't null. Without this check, calling `visit.call(&obj)` where `let obj = None;` will segfault.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
Co-authored-by: Nate Kent <nate@nkent.net>
Closes#2915
When using the C API directly, the intended way to call `visitproc` is
via the `Py_VISIT` macro, which checks to see that the provided pointer
is not null before passing it along to `visitproc`. Because PyO3 isn't
using the macro, it needs to manually check that the pointer isn't null.
Without this check, calling `visit.call(&obj)` where `let obj = None;`
will segfault.
2796: Forward cfgs on pyclass fields to the method defs r=davidhewitt a=mejrs
With this and the cfg_attr PR, I don't need cfg_eval at all anymore :)
- [x] needs some more tests
Co-authored-by: mejrs <>
2843: remove functionality deprecated in 0.16 r=davidhewitt a=davidhewitt
Simple cleanup to remove all functionality marked deprecated in the 0.16 releases.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2842: Stop leaking in `new_closure` r=adamreichold a=davidhewitt
This is a rebase of #2690 which simplifies the `MaybeLeaked` abstraction from that PR with just `Cow<'static, CStr>`.
This enabled me to annotate with `FIXME` all the places where we still leak; I wonder if we could potentially use `GILOnceCell` in future and statics to avoid those. As those callsities are in `#[pyclass]` and `#[pyfunction]` these are effectively in statics anyway, but it would be nice to tidy up.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2838: pypy: re-enable PyFunction on 3.8+ r=davidhewitt a=davidhewitt
PyPy [fixed the crashes associated with `PyFunction](https://foss.heptapod.net/pypy/pypy/-/issues/3776#note_191626) in PyPy 7.3.10 (for 3.8+) - which I think is to be released shortly. So I think we should re-enable this API and treat it as a PyPy bug which users can mitigate by updating their PyPy.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2398: Add `GILOnceCell::get_or_try_init` r=mejrs a=a1phyr
This is similar to [`OnceCell::get_or_try_init`](https://docs.rs/once_cell/latest/once_cell/sync/struct.OnceCell.html#method.get_or_try_init) and is very useful for fallible initialization.
Co-authored-by: Benoît du Garreau <bdgdlm@outlook.com>
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2826: ci: run checks for all platforms on PR r=adamreichold a=davidhewitt
I've been struggling a little to merge PRs with the new bors workflow; overall I think the lighter PR workflow is better but the number of combinations of older pythons / platforms not covered makes it easy for the bors step to fail.
This PR tries to improve the situation by merging the `clippy` and `check-target` job and running it for all supported platforms on PR. Hopefully if these are green, then there's high likelihood that tests will build and should pass unless there's logic errors.
While creating this I found a build error on PyPy which made me notice we can support `PyList::get_item_unchecked` for PyPy, so I added it.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
2784: Automatically generate `__text_signature__` for all functions r=davidhewitt a=davidhewitt
This PR makes it so that PyO3 generates `__text_signature__` by default for all functions. It also introduces `#[pyo3(text_signature = false)]` to disable the built-in generation.
There are a few limitations which we can improve later:
- All default values are currently set to `...`. I think this is ok because `.pyi` files often do the same. Maybe for numbers, strings, `None` and `True`/`False` we could render these in a future PR.
- No support for `#[new]` yet.
Alternative design ideas:
- Only autogenerate for methods with `#[pyo3(signature = (...))]` annotation. I started with this, and then decided it made sense to do it for everything.
- Opt-out with `#[pyo3(text_signature = None)]`. This is slightly harder to parse in the macro, but matches the final result in Python better, so if this looks preferable to others, I can change from `text_signature = false` to `text_signature = None`.
There's some small tidying up / refactoring to do before this merges (happy to take suggestions on this), however the general logic, design and docs are ready for review.
2827: pypy: enable `PyList::get_item_unchecked` r=adamreichold a=davidhewitt
Split out from #2826. Approved previously as part of that review.
Co-authored-by: David Hewitt <1939362+davidhewitt@users.noreply.github.com>
