def ne(self, event_property, value):
        """A not-equal filter chain.

        >>> request_time = EventExpression('request', 'elapsed_ms')
        >>> filtered = request_time.ne('path', '/')
        >>> print(filtered)
        request(elapsed_ms).ne(path, "/")
        """
        c = self.copy()
        c.filters.append(filters.NE(event_property, value))
        return c
A not-equal filter chain.

        >>> request_time = EventExpression('request', 'elapsed_ms')
        >>> filtered = request_time.ne('path', '/')
        >>> print(filtered)
        request(elapsed_ms).ne(path, "/")