pyo3/tests/test_pyfunction.rs

391 lines
10 KiB
Rust

#![cfg(feature = "macros")]
#[cfg(not(Py_LIMITED_API))]
use pyo3::buffer::PyBuffer;
use pyo3::prelude::*;
use pyo3::types::{self, PyCFunction};
#[cfg(not(Py_LIMITED_API))]
use pyo3::types::{PyDateTime, PyFunction};
mod common;
#[pyfunction(arg = "true")]
fn optional_bool(arg: Option<bool>) -> String {
format!("{:?}", arg)
}
#[test]
fn test_optional_bool() {
// Regression test for issue #932
let gil = Python::acquire_gil();
let py = gil.python();
let f = wrap_pyfunction!(optional_bool)(py).unwrap();
py_assert!(py, f, "f() == 'Some(true)'");
py_assert!(py, f, "f(True) == 'Some(true)'");
py_assert!(py, f, "f(False) == 'Some(false)'");
py_assert!(py, f, "f(None) == 'None'");
}
#[cfg(not(Py_LIMITED_API))]
#[pyfunction]
fn buffer_inplace_add(py: Python<'_>, x: PyBuffer<i32>, y: PyBuffer<i32>) {
let x = x.as_mut_slice(py).unwrap();
let y = y.as_slice(py).unwrap();
for (xi, yi) in x.iter().zip(y) {
let xi_plus_yi = xi.get() + yi.get();
xi.set(xi_plus_yi);
}
}
#[cfg(not(Py_LIMITED_API))]
#[test]
fn test_buffer_add() {
let gil = Python::acquire_gil();
let py = gil.python();
let f = wrap_pyfunction!(buffer_inplace_add)(py).unwrap();
py_expect_exception!(
py,
f,
r#"
import array
a = array.array("i", [0, 1, 2, 3])
b = array.array("I", [0, 1, 2, 3])
f(a, b)
"#,
PyBufferError
);
pyo3::py_run!(
py,
f,
r#"
import array
a = array.array("i", [0, 1, 2, 3])
b = array.array("i", [2, 3, 4, 5])
f(a, b)
assert a, array.array("i", [2, 4, 6, 8])
"#
);
}
#[cfg(not(Py_LIMITED_API))]
#[pyfunction]
fn function_with_pyfunction_arg(fun: &PyFunction) -> PyResult<&PyAny> {
fun.call((), None)
}
#[pyfunction]
fn function_with_pycfunction_arg(fun: &PyCFunction) -> PyResult<&PyAny> {
fun.call((), None)
}
#[test]
fn test_functions_with_function_args() {
let gil = Python::acquire_gil();
let py = gil.python();
let py_cfunc_arg = wrap_pyfunction!(function_with_pycfunction_arg)(py).unwrap();
let bool_to_string = wrap_pyfunction!(optional_bool)(py).unwrap();
pyo3::py_run!(
py,
py_cfunc_arg
bool_to_string,
r#"
assert py_cfunc_arg(bool_to_string) == "Some(true)"
"#
);
#[cfg(not(Py_LIMITED_API))]
{
let py_func_arg = wrap_pyfunction!(function_with_pyfunction_arg)(py).unwrap();
pyo3::py_run!(
py,
py_func_arg,
r#"
def foo(): return "bar"
assert py_func_arg(foo) == "bar"
"#
);
}
}
#[cfg(not(Py_LIMITED_API))]
fn datetime_to_timestamp(dt: &PyAny) -> PyResult<i64> {
let dt: &PyDateTime = dt.extract()?;
let ts: f64 = dt.call_method0("timestamp")?.extract()?;
Ok(ts as i64)
}
#[cfg(not(Py_LIMITED_API))]
#[pyfunction]
fn function_with_custom_conversion(
#[pyo3(from_py_with = "datetime_to_timestamp")] timestamp: i64,
) -> i64 {
timestamp
}
#[cfg(not(Py_LIMITED_API))]
#[test]
fn test_function_with_custom_conversion() {
let gil = Python::acquire_gil();
let py = gil.python();
let custom_conv_func = wrap_pyfunction!(function_with_custom_conversion)(py).unwrap();
pyo3::py_run!(
py,
custom_conv_func,
r#"
import datetime
dt = datetime.datetime.fromtimestamp(1612040400)
assert custom_conv_func(dt) == 1612040400
"#
)
}
#[cfg(not(Py_LIMITED_API))]
#[test]
fn test_function_with_custom_conversion_error() {
let gil = Python::acquire_gil();
let py = gil.python();
let custom_conv_func = wrap_pyfunction!(function_with_custom_conversion)(py).unwrap();
py_expect_exception!(
py,
custom_conv_func,
"custom_conv_func(['a'])",
PyTypeError,
"argument 'timestamp': 'list' object cannot be converted to 'PyDateTime'"
);
}
#[pyclass]
#[derive(Debug, FromPyObject)]
struct ValueClass {
#[pyo3(get)]
value: usize,
}
#[pyfunction]
fn conversion_error(
str_arg: &str,
int_arg: i64,
tuple_arg: (&str, f64),
option_arg: Option<i64>,
struct_arg: Option<ValueClass>,
) {
println!(
"{:?} {:?} {:?} {:?} {:?}",
str_arg, int_arg, tuple_arg, option_arg, struct_arg
);
}
#[test]
fn test_conversion_error() {
let gil = Python::acquire_gil();
let py = gil.python();
let conversion_error = wrap_pyfunction!(conversion_error)(py).unwrap();
py_expect_exception!(
py,
conversion_error,
"conversion_error(None, None, None, None, None)",
PyTypeError,
"argument 'str_arg': 'NoneType' object cannot be converted to 'PyString'"
);
py_expect_exception!(
py,
conversion_error,
"conversion_error(100, None, None, None, None)",
PyTypeError,
"argument 'str_arg': 'int' object cannot be converted to 'PyString'"
);
py_expect_exception!(
py,
conversion_error,
"conversion_error('string1', 'string2', None, None, None)",
PyTypeError,
"argument 'int_arg': 'str' object cannot be interpreted as an integer"
);
py_expect_exception!(
py,
conversion_error,
"conversion_error('string1', -100, 'string2', None, None)",
PyTypeError,
"argument 'tuple_arg': 'str' object cannot be converted to 'PyTuple'"
);
py_expect_exception!(
py,
conversion_error,
"conversion_error('string1', -100, ('string2', 10.), 'string3', None)",
PyTypeError,
"argument 'option_arg': 'str' object cannot be interpreted as an integer"
);
let exception = py_expect_exception!(
py,
conversion_error,
"
class ValueClass:
def __init__(self, value):
self.value = value
conversion_error('string1', -100, ('string2', 10.), None, ValueClass(\"no_expected_type\"))",
PyTypeError
);
assert_eq!(
extract_traceback(py, exception),
"TypeError: argument 'struct_arg': failed to \
extract field ValueClass.value: TypeError: 'str' object cannot be interpreted as an integer"
);
let exception = py_expect_exception!(
py,
conversion_error,
"
class ValueClass:
def __init__(self, value):
self.value = value
conversion_error('string1', -100, ('string2', 10.), None, ValueClass(-5))",
PyTypeError
);
assert_eq!(
extract_traceback(py, exception),
"TypeError: argument 'struct_arg': failed to \
extract field ValueClass.value: OverflowError: can't convert negative int to unsigned"
);
}
/// Helper function that concatenates the error message from
/// each error in the traceback into a single string that can
/// be tested.
fn extract_traceback(py: Python<'_>, mut error: PyErr) -> String {
let mut error_msg = error.to_string();
while let Some(cause) = error.cause(py) {
error_msg.push_str(": ");
error_msg.push_str(&cause.to_string());
error = cause
}
error_msg
}
#[test]
fn test_closure() {
let gil = Python::acquire_gil();
let py = gil.python();
let f = |args: &types::PyTuple, _kwargs: Option<&types::PyDict>| -> PyResult<_> {
let gil = Python::acquire_gil();
let py = gil.python();
let res: Vec<_> = args
.iter()
.map(|elem| {
if let Ok(i) = elem.extract::<i64>() {
(i + 1).into_py(py)
} else if let Ok(f) = elem.extract::<f64>() {
(2. * f).into_py(py)
} else if let Ok(mut s) = elem.extract::<String>() {
s.push_str("-py");
s.into_py(py)
} else {
panic!("unexpected argument type for {:?}", elem)
}
})
.collect();
Ok(res)
};
let closure_py = PyCFunction::new_closure(f, py).unwrap();
py_assert!(py, closure_py, "closure_py(42) == [43]");
py_assert!(
py,
closure_py,
"closure_py(42, 3.14, 'foo') == [43, 6.28, 'foo-py']"
);
}
#[test]
fn test_closure_counter() {
let gil = Python::acquire_gil();
let py = gil.python();
let counter = std::cell::RefCell::new(0);
let counter_fn =
move |_args: &types::PyTuple, _kwargs: Option<&types::PyDict>| -> PyResult<i32> {
let mut counter = counter.borrow_mut();
*counter += 1;
Ok(*counter)
};
let counter_py = PyCFunction::new_closure(counter_fn, py).unwrap();
py_assert!(py, counter_py, "counter_py() == 1");
py_assert!(py, counter_py, "counter_py() == 2");
py_assert!(py, counter_py, "counter_py() == 3");
}
#[test]
fn use_pyfunction() {
mod function_in_module {
use pyo3::prelude::*;
#[pyfunction]
pub fn foo(x: i32) -> i32 {
x
}
}
Python::with_gil(|py| {
use function_in_module::foo;
// check imported name can be wrapped
let f = wrap_pyfunction!(foo, py).unwrap();
assert_eq!(f.call1((5,)).unwrap().extract::<i32>().unwrap(), 5);
assert_eq!(f.call1((42,)).unwrap().extract::<i32>().unwrap(), 42);
// check path import can be wrapped
let f2 = wrap_pyfunction!(function_in_module::foo, py).unwrap();
assert_eq!(f2.call1((5,)).unwrap().extract::<i32>().unwrap(), 5);
assert_eq!(f2.call1((42,)).unwrap().extract::<i32>().unwrap(), 42);
})
}
#[test]
fn required_argument_after_option() {
#[pyfunction]
pub fn foo(x: Option<i32>, y: i32) -> i32 {
y + x.unwrap_or_default()
}
Python::with_gil(|py| {
let f = wrap_pyfunction!(foo, py).unwrap();
// it is an error to call this function with no arguments
py_expect_exception!(
py,
f,
"f()",
PyTypeError,
"foo() missing 2 required positional arguments: 'x' and 'y'"
);
// it is an error to call this function with one argument
py_expect_exception!(
py,
f,
"f(None)",
PyTypeError,
"foo() missing 1 required positional argument: 'y'"
);
// ok to call with two arguments
py_assert!(py, f, "f(None, 5) == 5");
// ok to call with keyword arguments
py_assert!(py, f, "f(x=None, y=5) == 5");
})
}