Method digit

crates/stdlib/src/unicodedata.rs:256–273

(
            &self,
            character: PyStrRef,
            default: OptionalArg<PyObjectRef>,
            vm: &VirtualMachine,
        )

        #[pymethod]
        fn digit(
            &self,
            character: PyStrRef,
            default: OptionalArg<PyObjectRef>,
            vm: &VirtualMachine,
        ) -> PyResult {
            let ch = self.extract_char(character, vm)?.and_then(|c| c.to_char());
            if let Some(ch) = ch
                && matches!(
                    ch.numeric_type(),
                    Some(NumericType::Decimal) | Some(NumericType::Digit)
                )
                && let Some(Number::Integer(n)) = ch.numeric_value()
            {
                return Ok(vm.ctx.new_int(n).into());
            }
            default.ok_or_else(|| vm.new_value_error("not a digit"))
        }

        #[pymethod]
        fn decimal(