[−][src]Trait cpython::ObjectProtocol
Trait that contains methods
Provided methods
fn hasattr<N>(&self, py: Python, attr_name: N) -> PyResult<bool> where
N: ToPyObject,
N: ToPyObject,
Determines whether this object has the given attribute. This is equivalent to the Python expression 'hasattr(self, attr_name)'.
fn getattr<N>(&self, py: Python, attr_name: N) -> PyResult<PyObject> where
N: ToPyObject,
N: ToPyObject,
Retrieves an attribute value. This is equivalent to the Python expression 'self.attr_name'.
fn setattr<N, V>(&self, py: Python, attr_name: N, value: V) -> PyResult<()> where
N: ToPyObject,
V: ToPyObject,
N: ToPyObject,
V: ToPyObject,
Sets an attribute value. This is equivalent to the Python expression 'self.attr_name = value'.
fn delattr<N>(&self, py: Python, attr_name: N) -> PyResult<()> where
N: ToPyObject,
N: ToPyObject,
Deletes an attribute. This is equivalent to the Python expression 'del self.attr_name'.
fn compare<O>(&self, py: Python, other: O) -> PyResult<Ordering> where
O: ToPyObject,
O: ToPyObject,
Compares two Python objects.
On Python 2, this is equivalent to the Python expression 'cmp(self, other)'.
On Python 3, this is equivalent to:
if self == other: return Equal elif a < b: return Less elif a > b: return Greater else: raise TypeError("ObjectProtocol::compare(): All comparisons returned false")
fn rich_compare<O>(
&self,
py: Python,
other: O,
compare_op: CompareOp
) -> PyResult<PyObject> where
O: ToPyObject,
&self,
py: Python,
other: O,
compare_op: CompareOp
) -> PyResult<PyObject> where
O: ToPyObject,
Compares two Python objects.
Depending on the value of compare_op
, equivalent to one of the following Python expressions:
- CompareOp::Eq:
self == other
- CompareOp::Ne:
self != other
- CompareOp::Lt:
self < other
- CompareOp::Le:
self <= other
- CompareOp::Gt:
self > other
- CompareOp::Ge:
self >= other
fn repr(&self, py: Python) -> PyResult<PyString>
Compute the string representation of self. This is equivalent to the Python expression 'repr(self)'.
fn str(&self, py: Python) -> PyResult<PyString>
Compute the string representation of self. This is equivalent to the Python expression 'str(self)'.
fn is_callable(&self, _py: Python) -> bool
Determines whether this object is callable.
fn call<A>(
&self,
py: Python,
args: A,
kwargs: Option<&PyDict>
) -> PyResult<PyObject> where
A: ToPyObject<ObjectType = PyTuple>,
&self,
py: Python,
args: A,
kwargs: Option<&PyDict>
) -> PyResult<PyObject> where
A: ToPyObject<ObjectType = PyTuple>,
Calls the object. This is equivalent to the Python expression: 'self(*args, **kwargs)'
args
should be a value that, when converted to Python, results in a tuple.
For this purpose, you can use:
cpython::NoArgs
when calling a method without any arguments- otherwise, a Rust tuple with 1 or more elements
fn call_method<A>(
&self,
py: Python,
name: &str,
args: A,
kwargs: Option<&PyDict>
) -> PyResult<PyObject> where
A: ToPyObject<ObjectType = PyTuple>,
&self,
py: Python,
name: &str,
args: A,
kwargs: Option<&PyDict>
) -> PyResult<PyObject> where
A: ToPyObject<ObjectType = PyTuple>,
Calls a method on the object. This is equivalent to the Python expression: 'self.name(*args, **kwargs)'
args
should be a value that, when converted to Python, results in a tuple.
For this purpose, you can use:
cpython::NoArgs
when calling a method without any arguments- otherwise, a Rust tuple with 1 or more elements
Example
use cpython::{NoArgs, ObjectProtocol}; // Call method without arguments: let value = obj.call_method(py, "method0", NoArgs, None).unwrap(); // Call method with a single argument: obj.call_method(py, "method1", (true,), None).unwrap();
fn hash(&self, py: Python) -> PyResult<Py_hash_t>
Retrieves the hash code of the object. This is equivalent to the Python expression: 'hash(self)'
fn is_true(&self, py: Python) -> PyResult<bool>
Returns whether the object is considered to be true. This is equivalent to the Python expression: 'not not self'
fn len(&self, py: Python) -> PyResult<usize>
Returns the length of the sequence or mapping. This is equivalent to the Python expression: 'len(self)'
fn get_item<K>(&self, py: Python, key: K) -> PyResult<PyObject> where
K: ToPyObject,
K: ToPyObject,
This is equivalent to the Python expression: 'self[key]'
fn set_item<K, V>(&self, py: Python, key: K, value: V) -> PyResult<()> where
K: ToPyObject,
V: ToPyObject,
K: ToPyObject,
V: ToPyObject,
Sets an item value. This is equivalent to the Python expression 'self[key] = value'.
fn del_item<K>(&self, py: Python, key: K) -> PyResult<()> where
K: ToPyObject,
K: ToPyObject,
Deletes an item. This is equivalent to the Python expression 'del self[key]'.
fn iter<'p>(&self, py: Python<'p>) -> PyResult<PyIterator<'p>>
Takes an object and returns an iterator for it. This is typically a new iterator but if the argument is an iterator, this returns itself.