#[cfg(feature = "experimental-inspect")]
use crate::inspect::types::TypeInfo;
#[cfg(feature = "experimental-inspect")]
use crate::inspect::{type_hint_subscript, PyStaticExpr};
#[cfg(feature = "experimental-inspect")]
use crate::type_object::PyTypeInfo;
use crate::{
conversion::{FromPyObjectOwned, IntoPyObject},
instance::Bound,
types::{any::PyAnyMethods, dict::PyDictMethods, PyDict},
Borrowed, FromPyObject, PyAny, PyErr, Python,
};
use std::{cmp, collections, hash};
impl<'py, K, V, H> IntoPyObject<'py> for collections::HashMap<K, V, H>
where
K: IntoPyObject<'py> + cmp::Eq + hash::Hash,
V: IntoPyObject<'py>,
H: hash::BuildHasher,
{
type Target = PyDict;
type Output = Bound<'py, Self::Target>;
type Error = PyErr;
#[cfg(feature = "experimental-inspect")]
const OUTPUT_TYPE: PyStaticExpr =
type_hint_subscript!(PyDict::TYPE_HINT, K::OUTPUT_TYPE, V::OUTPUT_TYPE);
fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
let dict = PyDict::new(py);
for (k, v) in self {
dict.set_item(k, v)?;
}
Ok(dict)
}
#[cfg(feature = "experimental-inspect")]
fn type_output() -> TypeInfo {
TypeInfo::dict_of(K::type_output(), V::type_output())
}
}
impl<'a, 'py, K, V, H> IntoPyObject<'py> for &'a collections::HashMap<K, V, H>
where
&'a K: IntoPyObject<'py> + cmp::Eq + hash::Hash,
&'a V: IntoPyObject<'py>,
H: hash::BuildHasher,
{
type Target = PyDict;
type Output = Bound<'py, Self::Target>;
type Error = PyErr;
#[cfg(feature = "experimental-inspect")]
const OUTPUT_TYPE: PyStaticExpr =
type_hint_subscript!(PyDict::TYPE_HINT, <&K>::OUTPUT_TYPE, <&V>::OUTPUT_TYPE);
fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
let dict = PyDict::new(py);
for (k, v) in self {
dict.set_item(k, v)?;
}
Ok(dict)
}
#[cfg(feature = "experimental-inspect")]
fn type_output() -> TypeInfo {
TypeInfo::dict_of(<&K>::type_output(), <&V>::type_output())
}
}
impl<'py, K, V> IntoPyObject<'py> for collections::BTreeMap<K, V>
where
K: IntoPyObject<'py> + cmp::Eq,
V: IntoPyObject<'py>,
{
type Target = PyDict;
type Output = Bound<'py, Self::Target>;
type Error = PyErr;
#[cfg(feature = "experimental-inspect")]
const OUTPUT_TYPE: PyStaticExpr =
type_hint_subscript!(PyDict::TYPE_HINT, K::OUTPUT_TYPE, V::OUTPUT_TYPE);
fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
let dict = PyDict::new(py);
for (k, v) in self {
dict.set_item(k, v)?;
}
Ok(dict)
}
#[cfg(feature = "experimental-inspect")]
fn type_output() -> TypeInfo {
TypeInfo::dict_of(K::type_output(), V::type_output())
}
}
impl<'a, 'py, K, V> IntoPyObject<'py> for &'a collections::BTreeMap<K, V>
where
&'a K: IntoPyObject<'py> + cmp::Eq,
&'a V: IntoPyObject<'py>,
K: 'a,
V: 'a,
{
type Target = PyDict;
type Output = Bound<'py, Self::Target>;
type Error = PyErr;
#[cfg(feature = "experimental-inspect")]
const OUTPUT_TYPE: PyStaticExpr =
type_hint_subscript!(PyDict::TYPE_HINT, <&K>::OUTPUT_TYPE, <&V>::OUTPUT_TYPE);
fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
let dict = PyDict::new(py);
for (k, v) in self {
dict.set_item(k, v)?;
}
Ok(dict)
}
#[cfg(feature = "experimental-inspect")]
fn type_output() -> TypeInfo {
TypeInfo::dict_of(<&K>::type_output(), <&V>::type_output())
}
}
impl<'py, K, V, S> FromPyObject<'_, 'py> for collections::HashMap<K, V, S>
where
K: FromPyObjectOwned<'py> + cmp::Eq + hash::Hash,
V: FromPyObjectOwned<'py>,
S: hash::BuildHasher + Default,
{
type Error = PyErr;
#[cfg(feature = "experimental-inspect")]
const INPUT_TYPE: PyStaticExpr =
type_hint_subscript!(&PyDict::TYPE_HINT, K::INPUT_TYPE, V::INPUT_TYPE);
fn extract(ob: Borrowed<'_, 'py, PyAny>) -> Result<Self, Self::Error> {
let dict = ob.cast::<PyDict>()?;
let mut ret = collections::HashMap::with_capacity_and_hasher(dict.len(), S::default());
for (k, v) in dict.iter() {
ret.insert(
k.extract().map_err(Into::into)?,
v.extract().map_err(Into::into)?,
);
}
Ok(ret)
}
#[cfg(feature = "experimental-inspect")]
fn type_input() -> TypeInfo {
TypeInfo::mapping_of(K::type_input(), V::type_input())
}
}
impl<'py, K, V> FromPyObject<'_, 'py> for collections::BTreeMap<K, V>
where
K: FromPyObjectOwned<'py> + cmp::Ord,
V: FromPyObjectOwned<'py>,
{
type Error = PyErr;
#[cfg(feature = "experimental-inspect")]
const INPUT_TYPE: PyStaticExpr =
type_hint_subscript!(PyDict::TYPE_HINT, K::INPUT_TYPE, V::INPUT_TYPE);
fn extract(ob: Borrowed<'_, 'py, PyAny>) -> Result<Self, PyErr> {
let dict = ob.cast::<PyDict>()?;
let mut ret = collections::BTreeMap::new();
for (k, v) in dict.iter() {
ret.insert(
k.extract().map_err(Into::into)?,
v.extract().map_err(Into::into)?,
);
}
Ok(ret)
}
#[cfg(feature = "experimental-inspect")]
fn type_input() -> TypeInfo {
TypeInfo::mapping_of(K::type_input(), V::type_input())
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::collections::{BTreeMap, HashMap};
#[test]
fn test_hashmap_to_python() {
Python::attach(|py| {
let mut map = HashMap::<i32, i32>::new();
map.insert(1, 1);
let py_map = (&map).into_pyobject(py).unwrap();
assert_eq!(py_map.len(), 1);
assert!(
py_map
.get_item(1)
.unwrap()
.unwrap()
.extract::<i32>()
.unwrap()
== 1
);
assert_eq!(map, py_map.extract().unwrap());
});
}
#[test]
fn test_btreemap_to_python() {
Python::attach(|py| {
let mut map = BTreeMap::<i32, i32>::new();
map.insert(1, 1);
let py_map = (&map).into_pyobject(py).unwrap();
assert_eq!(py_map.len(), 1);
assert!(
py_map
.get_item(1)
.unwrap()
.unwrap()
.extract::<i32>()
.unwrap()
== 1
);
assert_eq!(map, py_map.extract().unwrap());
});
}
#[test]
fn test_hashmap_into_python() {
Python::attach(|py| {
let mut map = HashMap::<i32, i32>::new();
map.insert(1, 1);
let py_map = map.into_pyobject(py).unwrap();
assert_eq!(py_map.len(), 1);
assert!(
py_map
.get_item(1)
.unwrap()
.unwrap()
.extract::<i32>()
.unwrap()
== 1
);
});
}
#[test]
fn test_btreemap_into_py() {
Python::attach(|py| {
let mut map = BTreeMap::<i32, i32>::new();
map.insert(1, 1);
let py_map = map.into_pyobject(py).unwrap();
assert_eq!(py_map.len(), 1);
assert!(
py_map
.get_item(1)
.unwrap()
.unwrap()
.extract::<i32>()
.unwrap()
== 1
);
});
}
}