def get_indices(self, include_aliases=False):
        """
        Get a dict holding an entry for each index which exists.

        If include_alises is True, the dict will also contain entries for
        aliases.

        The key for each entry in the dict is the index or alias name.  The
        value is a dict holding the following properties:

         - num_docs: Number of documents in the index or alias.
         - alias_for: Only present for an alias: holds a list of indices which
           this is an alias for.

        """
        state = self.conn.cluster.state()
        status = self.status()
        result = {}
        indices_status = status['indices']
        indices_metadata = state['metadata']['indices']
        for index in sorted(indices_status.keys()):
            info = indices_status[index]
            try:
                num_docs = info['docs']['num_docs']
            except KeyError:
                num_docs = 0
            result[index] = dict(num_docs=num_docs)

            if not include_aliases:
                continue
            try:
                metadata = indices_metadata[index]
            except KeyError:
                continue
            for alias in metadata.get('aliases', []):
                try:
                    alias_obj = result[alias]
                except KeyError:
                    alias_obj = {}
                    result[alias] = alias_obj
                alias_obj['num_docs'] = alias_obj.get('num_docs', 0) + num_docs
                try:
                    alias_obj['alias_for'].append(index)
                except KeyError:
                    alias_obj['alias_for'] = [index]
        return result
Get a dict holding an entry for each index which exists.

        If include_alises is True, the dict will also contain entries for
        aliases.

        The key for each entry in the dict is the index or alias name.  The
        value is a dict holding the following properties:

         - num_docs: Number of documents in the index or alias.
         - alias_for: Only present for an alias: holds a list of indices which
           this is an alias for.