Method into_option

crates/vm/src/stdlib/posix.rs:703–716

(
                arg: OptionalArg<PyObjectRef>,
                vm: &VirtualMachine,
            )

            Option<PyObjectRef>,
        )> {
            fn into_option(
                arg: OptionalArg<PyObjectRef>,
                vm: &VirtualMachine,
            ) -> PyResult<Option<PyObjectRef>> {
                match arg {
                    OptionalArg::Present(obj) => {
                        if !obj.is_callable() {
                            return Err(vm.new_type_error("Args must be callable"));
                        }
                        Ok(Some(obj))
                    }
                    OptionalArg::Missing => Ok(None),
                }
            }
            let before = into_option(self.before, vm)?;
            let after_in_parent = into_option(self.after_in_parent, vm)?;
            let after_in_child = into_option(self.after_in_child, vm)?;