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|�S)a;Return whether or not given value is a valid URL.

    This validator was inspired from [URL validator of dperini][1].
    The following diagram is from [urlly][2].

            foo://admin:hunter1@example.com:8042/over/there?name=ferret#nose
            \_/   \___/ \_____/ \_________/ \__/\_________/ \_________/ \__/
             |      |       |       |        |       |          |         |
          scheme username password hostname port    path      query    fragment

    [1]: https://gist.github.com/dperini/729294
    [2]: https://github.com/treeform/urlly

    Examples:
        >>> url('http://duck.com')
        # Output: True
        >>> url('ftp://foobar.dk')
        # Output: True
        >>> url('http://10.0.0.1')
        # Output: True
        >>> url('http://example.com/">user@example.com')
        # Output: ValidationError(func=url, ...)

    Args:
        value:
            URL string to validate.
        skip_ipv6_addr:
            When URL string cannot contain an IPv6 address.
        skip_ipv4_addr:
            When URL string cannot contain an IPv4 address.
        may_have_port:
            URL string may contain port number.
        simple_host:
            URL string maybe only hyphens and alpha-numerals.
        rfc_1034:
            Allow trailing dot in domain/host name.
            Ref: [RFC 1034](https://www.rfc-editor.org/rfc/rfc1034).
        rfc_2782:
            Domain/Host name is of type service record.
            Ref: [RFC 2782](https://www.rfc-editor.org/rfc/rfc2782).

    Returns:
        (Literal[True]):
            If `value` is a valid slug.
        (ValidationError):
            If `value` is an invalid slug.

    Note:
        - *In version 0.11.3*:
            - Added support for URLs containing localhost.
        - *In version 0.11.0*:
            - Made the regular expression case insensitive.
        - *In version 0.10.3*:
            - Added a `public` parameter.
        - *In version 0.10.2*:
            - Added support for various exotic URLs.
            - Fixed various false positives.

    > *New in version 0.2.0*.
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