How to use the rfc3986.exceptions.RFC3986Exception function in rfc3986

url = str(url)
        # Ignore any leading and trailing whitespace characters.
        url = url.strip()
        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
        # `data` etc to work around exceptions from `url_parse`, which
        # handles RFC 3986 only.
        if ':' in url and not url.lower().startswith('http'):
            self.url = url
            return

        # Support for unicode domain names and paths.
        try:
            uri = rfc3986.urlparse(url)
            if validate:
                rfc3986.normalize_uri(url)
        except rfc3986.exceptions.RFC3986Exception:
            raise InvalidURL(f"Invalid URL {url!r}: URL is imporoper.")

        if not uri.scheme:
            error = (
                "Invalid URL {0!r}: No scheme supplied. Perhaps you meant http://{0}?"
            )
            error = error.format(to_native_string(url, 'utf8'))
            raise MissingScheme(error)

        if not uri.host:
            raise InvalidURL(f"Invalid URL {url!r}: No host supplied")

        # In general, we want to try IDNA encoding the hostname if the string contains
        # non-ASCII characters. This allows users to automatically get the correct IDNA
        # behaviour. For strings containing only ASCII characters, we need to also verify
        # it doesn't start with a wildcard (*), before allowing the unencoded hostname.

url = str(url)
        # Ignore any leading and trailing whitespace characters.
        url = url.strip()
        # Don't do any URL preparation for non-HTTP schemes like `mailto`,
        # `data` etc to work around exceptions from `url_parse`, which
        # handles RFC 3986 only.
        if ':' in url and not url.lower().startswith('http'):
            self.url = url
            return

        # Support for unicode domain names and paths.
        try:
            uri = rfc3986.urlparse(url)
            if validate:
                rfc3986.normalize_uri(url)
        except rfc3986.exceptions.RFC3986Exception:
            raise InvalidURL(f"Invalid URL {url!r}: URL is imporoper.")

        if not uri.scheme:
            error = (
                "Invalid URL {0!r}: No scheme supplied. Perhaps you meant http://{0}?"
            )
            error = error.format(to_native_string(url, 'utf8'))
            raise MissingScheme(error)

        if not uri.host:
            raise InvalidURL(f"Invalid URL {url!r}: No host supplied")

        # In general, we want to try IDNA encoding the hostname if the string contains
        # non-ASCII characters. This allows users to automatically get the correct IDNA
        # behaviour. For strings containing only ASCII characters, we need to also verify
        # it doesn't start with a wildcard (*), before allowing the unencoded hostname.

def __call__(self, value):
        uri = rfc3986.uri_reference(value)
        validator = rfc3986.validators.Validator().require_presence_of(
            'scheme', 'host',
        ).check_validity_of(
            'scheme', 'host', 'path',
        )
        if self.schemes:
            validator = validator.allow_schemes(*self.schemes)
        try:
            validator.validate(uri)
        except rfc3986.exceptions.RFC3986Exception as exc:
            raise ValueError(exc)

        if self.max_length is not None and len(value) > self.max_length:
            raise ValueError("Value '%s' exceeds maximum length %d" %
                             (value, self.max_length))

        # NOTE(dhellmann): self.value is deprecated, and we don't want
        # to trigger a deprecation warning ourselves so we modify
        # self._value directly.
        self._value = value
        return value

def __call__(self, value):
        uri = rfc3986.uri_reference(value)
        validator = rfc3986.validators.Validator().require_presence_of(
            'scheme', 'host',
        ).check_validity_of(
            'scheme', 'host', 'path',
        )
        if self.schemes:
            validator = validator.allow_schemes(*self.schemes)
        try:
            validator.validate(uri)
        except rfc3986.exceptions.RFC3986Exception as exc:
            raise ValueError(exc)

        if self.max_length is not None and len(value) > self.max_length:
            raise ValueError("Value '%s' exceeds maximum length %d" %
                             (value, self.max_length))

        # NOTE(dhellmann): self.value is deprecated, and we don't want
        # to trigger a deprecation warning ourselves so we modify
        # self._value directly.
        self._value = value
        return value

def _validate_repository_url(repository_url: str) -> None:
    """Validate the given url for allowed schemes and components."""
    # Allowed schemes are http and https, based on whether the repository
    # supports TLS or not, and scheme and host must be present in the URL
    validator = (
        rfc3986.validators.Validator()
        .allow_schemes("http", "https")
        .require_presence_of("scheme", "host")
    )
    try:
        validator.validate(rfc3986.uri_reference(repository_url))
    except rfc3986.exceptions.RFC3986Exception as exc:
        raise exceptions.UnreachableRepositoryURLDetected(
            f"Invalid repository URL: {exc.args[0]}."
        )