pub trait PyMappingMethods<'py>: Sealed {
// Required methods
fn len(&self) -> PyResult<usize>;
fn is_empty(&self) -> PyResult<bool>;
fn contains<K>(&self, key: K) -> PyResult<bool>
where K: ToPyObject;
fn get_item<K>(&self, key: K) -> PyResult<Bound<'py, PyAny>>
where K: ToPyObject;
fn set_item<K, V>(&self, key: K, value: V) -> PyResult<()>
where K: ToPyObject,
V: ToPyObject;
fn del_item<K>(&self, key: K) -> PyResult<()>
where K: ToPyObject;
fn keys(&self) -> PyResult<Bound<'py, PySequence>>;
fn values(&self) -> PyResult<Bound<'py, PySequence>>;
fn items(&self) -> PyResult<Bound<'py, PySequence>>;
}Expand description
Implementation of functionality for PyMapping.
These methods are defined for the Bound<'py, PyMapping> smart pointer, so to use method call
syntax these methods are separated into a trait, because stable Rust does not yet support
arbitrary_self_types.
Required Methods§
Sourcefn len(&self) -> PyResult<usize>
fn len(&self) -> PyResult<usize>
Returns the number of objects in the mapping.
This is equivalent to the Python expression len(self).
Sourcefn contains<K>(&self, key: K) -> PyResult<bool>where
K: ToPyObject,
fn contains<K>(&self, key: K) -> PyResult<bool>where
K: ToPyObject,
Determines if the mapping contains the specified key.
This is equivalent to the Python expression key in self.
Sourcefn get_item<K>(&self, key: K) -> PyResult<Bound<'py, PyAny>>where
K: ToPyObject,
fn get_item<K>(&self, key: K) -> PyResult<Bound<'py, PyAny>>where
K: ToPyObject,
Gets the item in self with key key.
Returns an Err if the item with specified key is not found, usually KeyError.
This is equivalent to the Python expression self[key].
Sourcefn set_item<K, V>(&self, key: K, value: V) -> PyResult<()>where
K: ToPyObject,
V: ToPyObject,
fn set_item<K, V>(&self, key: K, value: V) -> PyResult<()>where
K: ToPyObject,
V: ToPyObject,
Sets the item in self with key key.
This is equivalent to the Python expression self[key] = value.
Sourcefn del_item<K>(&self, key: K) -> PyResult<()>where
K: ToPyObject,
fn del_item<K>(&self, key: K) -> PyResult<()>where
K: ToPyObject,
Deletes the item with key key.
This is equivalent to the Python statement del self[key].
Sourcefn keys(&self) -> PyResult<Bound<'py, PySequence>>
fn keys(&self) -> PyResult<Bound<'py, PySequence>>
Returns a sequence containing all keys in the mapping.
Sourcefn values(&self) -> PyResult<Bound<'py, PySequence>>
fn values(&self) -> PyResult<Bound<'py, PySequence>>
Returns a sequence containing all values in the mapping.
Sourcefn items(&self) -> PyResult<Bound<'py, PySequence>>
fn items(&self) -> PyResult<Bound<'py, PySequence>>
Returns a sequence of tuples of all (key, value) pairs in the mapping.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.