How to use the yarl.__init__.cached_property function in yarl

    @cached_property
    def parent(self):
        """A new URL with last part of path removed and cleaned up query and
        fragment.

        """
        path = self.raw_path
        if not path or path == "/":
            if self.raw_fragment or self.raw_query_string:
                return URL(self._val._replace(query="", fragment=""), encoded=True)
            return self
        parts = path.split("/")
        val = self._val._replace(path="/".join(parts[:-1]), query="", fragment="")
        return URL(val, encoded=True)

    @cached_property
    def raw_parts(self):
        """A tuple containing encoded *path* parts.

        ('/',) for absolute URLs if *path* is missing.

        """
        path = self._val.path
        if self.is_absolute():
            if not path:
                parts = ["/"]
            else:
                parts = ["/"] + path[1:].split("/")
        else:
            if path.startswith("/"):
                parts = ["/"] + path[1:].split("/")
            else:

    @cached_property
    def password(self):
        """Decoded password part of URL.

        None if password is missing.

        """
        return self._UNQUOTER(self.raw_password)

    @cached_property
    def name(self):
        """The last part of parts."""
        return self._UNQUOTER(self.raw_name)

    @cached_property
    def query_string(self):
        """Decoded query part of URL.

        Empty string if query is missing.

        """
        return self._QS_UNQUOTER(self.raw_query_string)

    @cached_property
    def parts(self):
        """A tuple containing decoded *path* parts.

        ('/',) for absolute URLs if *path* is missing.

        """
        return tuple(self._UNQUOTER(part) for part in self.raw_parts)

    @cached_property
    def user(self):
        """Decoded user part of URL.

        None if user is missing.

        """
        return self._UNQUOTER(self.raw_user)

    @cached_property
    def path(self):
        """Decoded path of URL.

        / for absolute URLs without path part.

        """
        return self._PATH_UNQUOTER(self.raw_path)

    @cached_property
    def fragment(self):
        """Decoded fragment part of URL.

        Empty string if fragment is missing.

        """
        return self._UNQUOTER(self.raw_fragment)

    @cached_property
    def host(self):
        """Decoded host part of URL.

        None for relative URLs.

        """
        raw = self.raw_host
        if raw is None:
            return None
        if "%" in raw:
            # Hack for scoped IPv6 addresses like
            # fe80::2%Проверка
            # presence of '%' sign means only IPv6 address, so idna is useless.
            return raw
        try:
            return idna.decode(raw.encode("ascii"))