How to use the pandasticsearch.filters.And function in pandasticsearch

def __and__(self, x):
        # Combine results
        if isinstance(self, And):
            self.subtree['must'].append(x.subtree)
            return self
        elif isinstance(x, And):
            x.subtree['must'].append(self.subtree)
            return x
        return And(self, x)

def __and__(self, x):
        # Combine results
        if isinstance(self, And):
            self.subtree['must'].append(x.subtree)
            return self
        elif isinstance(x, And):
            x.subtree['must'].append(self.subtree)
            return x
        return And(self, x)

def __and__(self, x):
        # Combine results
        if isinstance(self, And):
            self.subtree['must'].append(x.subtree)
            return self
        elif isinstance(x, And):
            x.subtree['must'].append(self.subtree)
            return x
        return And(self, x)

def __init__(self, *args):
        [isinstance(x, Filter) for x in args]
        super(And, self).__init__()
        self._filter = {'bool': {'must': [x.build() for x in args]}}