pyo3/tests/test_inheritance.rs

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#![feature(proc_macro, specialization)]
extern crate pyo3;
use pyo3::prelude::*;
use std::isize;
use pyo3::py::class as pyclass;
use pyo3::py::methods as pymethods;
#[macro_use]
mod common;
#[pyclass]
struct BaseClass {
#[prop(get)]
val1: usize,
}
#[pyclass(subclass)]
struct SubclassAble {}
#[test]
fn subclass() {
let gil = Python::acquire_gil();
let py = gil.python();
let d = PyDict::new(py);
d.set_item("SubclassAble", py.get_type::<SubclassAble>()).unwrap();
py.run("class A(SubclassAble): pass\nassert issubclass(A, SubclassAble)", None, Some(d))
.map_err(|e| e.print(py))
.unwrap();
}
#[pymethods]
impl BaseClass {
#[new]
fn __new__(obj: &PyRawObject) -> PyResult<()> {
obj.init(|_| BaseClass{val1: 10})
}
}
#[pyclass(base=BaseClass)]
struct SubClass {
#[prop(get)]
val2: usize,
}
#[pymethods]
impl SubClass {
#[new]
fn __new__(obj: &PyRawObject) -> PyResult<()> {
obj.init(|_| SubClass{val2: 5})?;
BaseClass::__new__(obj)
}
}
#[test]
fn inheritance_with_new_methods() {
let gil = Python::acquire_gil();
let py = gil.python();
let _typebase = py.get_type::<BaseClass>();
let typeobj = py.get_type::<SubClass>();
let inst = typeobj.call(NoArgs, NoArgs).unwrap();
py_run!(py, inst, "assert inst.val1 == 10; assert inst.val2 == 5");
}