Method set_characters_written

crates/vm/src/exceptions.rs:2181–2207

(
            &self,
            value: Option<PyObjectRef>,
            vm: &VirtualMachine,
        )

        #[pygetset(setter)]
        fn set_characters_written(
            &self,
            value: Option<PyObjectRef>,
            vm: &VirtualMachine,
        ) -> PyResult<()> {
            match value {
                None => {
                    // Deleting the attribute
                    if self.written.load() == -1 {
                        Err(vm.new_attribute_error("characters_written"))
                    } else {
                        self.written.store(-1);
                        Ok(())
                    }
                }
                Some(v) => {
                    let n = v
                        .try_index(vm)?
                        .try_to_primitive::<isize>(vm)
                        .map_err(|_| {
                            vm.new_value_error("cannot convert characters_written value to isize")
                        })?;
                    self.written.store(n);
                    Ok(())
                }
            }
        }
    }

    #[pyexception(name, base = PyOSError, ctx = "blocking_io_error", impl)]