def le(self, event_property, value):
        """A less-than-or-equal-to filter chain.

        >>> request_time = EventExpression('request', 'elapsed_ms')
        >>> filtered = request_time.le('elapsed_ms', 500)
        >>> print(filtered)
        request(elapsed_ms).le(elapsed_ms, 500)
        """
        c = self.copy()
        c.filters.append(filters.LE(event_property, value))
        return c
def le ( self , event_property , value ) : c = self . copy ( ) c . filters . append ( filters . LE ( event_property , value ) ) return c
A less-than-or-equal-to filter chain.

        >>> request_time = EventExpression('request', 'elapsed_ms')
        >>> filtered = request_time.le('elapsed_ms', 500)
        >>> print(filtered)
        request(elapsed_ms).le(elapsed_ms, 500)