How to use the num2words.compat.to_s function in num2words

float(value) == value
        except (ValueError, TypeError, AssertionError):
            raise TypeError(self.errmsg_nonnum % value)

        pre, post = self.float2tuple(float(value))

        post = str(post)
        post = '0' * (self.precision - len(post)) + post

        out = [self.to_cardinal(pre, reading=reading, prefer=prefer)]
        if self.precision:
            out.append(self.title(self.pointword[1 if reading else 0]))

        for i in range(self.precision):
            curr = int(post[i])
            out.append(to_s(
                self.to_cardinal(curr, reading=reading, prefer=prefer)))

        return "".join(out)

float(value) == value
        except (ValueError, TypeError, AssertionError, AttributeError):
            raise TypeError(self.errmsg_nonnum % value)

        pre, post = self.float2tuple(float(value))

        post = str(post)
        post = '0' * (self.precision - len(post)) + post

        out = [self.to_cardinal(pre)]
        if self.precision:
            out.append(self.title(self.pointword))

        for i in range(self.precision):
            curr = int(post[i])
            out.append(to_s(self.to_cardinal(curr)))

        return " ".join(out)