Trait PyCallbackOutput 

pub trait PyCallbackOutput: Copy + Sealed {
    const ERR_VALUE: Self;
}

A type which can be the return type of a python C-API callback

Required Associated Constants

const ERR_VALUE: Self

The error value to return to python if the callback raised an exception

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl PyCallbackOutput for *mut PyObject

const ERR_VALUE: Self

impl PyCallbackOutput for c_int

const ERR_VALUE: Self = -1

Implementors

impl PyCallbackOutput for Py_ssize_t

const ERR_VALUE: Self = -1