Trait puff_rs::python::PyTryFrom

source · 
pub trait PyTryFrom<'v>: Sized + PyNativeType {
    fn try_from<V>(value: V) -> Result<&'v Self, PyDowncastError<'v>>
    where
        V: Into<&'v PyAny>;
    fn try_from_exact<V>(value: V) -> Result<&'v Self, PyDowncastError<'v>>
    where
        V: Into<&'v PyAny>;
    unsafe fn try_from_unchecked<V>(value: V) -> &'v Self
    where
        V: Into<&'v PyAny>;
}
Expand description

Trait implemented by Python object types that allow a checked downcast. If T implements PyTryFrom, we can convert &PyAny to &T.

This trait is similar to std::convert::TryFrom

Required Methods

Cast from a concrete Python object type to PyObject.

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

Cast a PyAny to a specific type of PyObject. The caller must have already verified the reference is for this type.

Safety

Callers must ensure that the type is valid or risk type confusion.

Implementors