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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 get(self, path_or_index, default=None):
 """ Get details about a given result :param path_or_index: The path (or index) of the result to fetch. :param default: If the given result does not exist, return this value instead :return: A tuple of `(error, value)`. If the entry does not exist then `(err, default)` is returned, where `err` is the actual error which occurred. You can use :meth:`couchbase.exceptions.CouchbaseError.rc_to_exctype` to convert the error code to a proper exception class :raise: :exc:`IndexError` or :exc:`KeyError` if `path_or_index` is not an initially requested path. This is a programming error as opposed to a constraint error where the path is not found. """

        err, value = self._resolve(path_or_index)
        value = default if err else value
        return err, value