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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def query(cls, name, use_kerberos=None, debug=False):
 """Query the LIGO Channel Information System for the `Channel` matching the given name Parameters name : `str` name of channel use_kerberos : `bool`, optional use an existing Kerberos ticket as the authentication credential, default behaviour will check for credentials and request username and password if none are found (`None`) debug : `bool`, optional print verbose HTTP connection status for debugging, default: `False` Returns ------- c : `Channel` a new `Channel` containing all of the attributes set from its entry in the CIS """

        channellist = ChannelList.query(name, use_kerberos=use_kerberos,
                                        debug=debug)
        if not channellist:
            raise ValueError("No channels found matching '%s'" % name)
        if len(channellist) > 1:
            raise ValueError("%d channels found matching '%s', please refine "
                             "search, or use `ChannelList.query` to return "
                             "all results" % (len(channellist), name))
        return channellist[0]