@classmethod
    @unguarded
    def validate_url(cls, url):
        """
        Return a boolean indicating whether the URL has a protocol and hostname.
        If a port is specified, ensure it is an integer.

        Arguments:
            url (str): The URL to check.

        Returns:
            Boolean indicating whether the URL has a protocol and hostname.
        """
        result = urlparse.urlsplit(url)

        # Check that we have a protocol and hostname
        if not result.scheme or not result.netloc:
            return False

        # Check that the port is an integer
        try:
            if result.port is not None:
                int(result.port)
            elif result.netloc.endswith(':'):
                # Valid URLs do not end with colons.
                return False
        except __HOLE__:
            return False
        else:
            return True
dataset/ETHPy150Open edx/bok-choy/bok_choy/page_object.py/PageObject.validate_url