def __eq__(self, other):
        return isinstance(other, AbstractVariableExpression) and \
               self.variable == other.variable
:return: Indices stats. http://elasticsearch-py.readthedocs.org/en/master/api.html#elasticsearch.client.IndicesClient.stats
dataset/ETHPy150Open nltk/nltk/nltk/sem/logic.py/AbstractVariableExpression.__eq__--crossover with--dataset/ETHPy150Open elastic/rally/esrally/cluster.py/Cluster.indices_stats