Function check_decoded

crates/vm/src/stdlib/_io.rs:402–409

(decoded: PyObjectRef, vm: &VirtualMachine)

    }

    fn check_decoded(decoded: PyObjectRef, vm: &VirtualMachine) -> PyResult<PyStrRef> {
        decoded.downcast().map_err(|obj| {
            vm.new_type_error(format!(
                "decoder should return a string result, not '{}'",
                obj.class().name()
            ))
        })
    }

    #[pyattr]
    #[pyclass(name = "_IOBase")]