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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 feature_path_unset(self):
 """Copy features to memory and remove the association of the feature file."""

        if not self.feature_file:
            raise IOError('No feature file to unset')

        with open(self.feature_path) as handle:
            feats = list(GFF.parse(handle))
            if len(feats) > 1:
                log.warning('Too many sequences in GFF')
            else:
                tmp = feats[0].features

        self.feature_dir = None
        self.feature_file = None
        self.features = tmp