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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 cache_key_name(cls, *args):
 """Return the name of the key to use to cache the current configuration"""

        if cls.KEY_FIELDS != ():
            if len(args) != len(cls.KEY_FIELDS):
                raise TypeError(
                    "cache_key_name() takes exactly {} arguments ({} given)".format(len(cls.KEY_FIELDS), len(args))
                )
            # pylint: disable=unicode-builtin
            return 'configuration/{}/current/{}'.format(cls.__name__, ','.join(six.text_type(arg) for arg in args))
        else:
            return 'configuration/{}/current'.format(cls.__name__)