Trait pyo3::PyTryFrom[−][src]

pub trait PyTryFrom: Sized {
    type Error;
    fn try_from(value: &PyObjectRef) -> Result<&Self, Self::Error>;
    fn try_from_exact(value: &PyObjectRef) -> Result<&Self, Self::Error>;
    fn try_from_mut(value: &PyObjectRef) -> Result<&mut Self, Self::Error>;
    fn try_from_mut_exact(value: &PyObjectRef) -> Result<&mut Self, Self::Error>;
}

Trait implemented by Python object types that allow a checked downcast. This trait is similar to std::convert::TryFrom

Associated Types

`type Error`

The type returned in the event of a conversion error.

Required Methods

`fn try_from(value: &PyObjectRef) -> Result<&Self, Self::Error>`

Cast from a concrete Python object type to PyObject.

`fn try_from_exact(value: &PyObjectRef) -> Result<&Self, Self::Error>`

Cast from a concrete Python object type to PyObject. With exact type check.

`fn try_from_mut(value: &PyObjectRef) -> Result<&mut Self, Self::Error>`

Cast from a concrete Python object type to PyObject.

`fn try_from_mut_exact(value: &PyObjectRef) -> Result<&mut Self, Self::Error>`

Cast from a concrete Python object type to PyObject. With exact type check.

Implementors

impl<T> PyTryFrom for T where T: PyTypeInfo, type Error = PyDowncastError;
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impl PyTryFrom for PySequence type Error = PyDowncastError;
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