According to this article there was a python whose body circumference was 85cm. This means its diameter was 27cm.
Would it be possible for this snake to constrict animals that are about the same size as its diameter? It is hard to imagine it having enough flexibility to constrict a swamp rat, for example, whose size is less than 27cm. Could it kill such animals by another method, say with its jaws or by crushing them by rolling over them? Or are such small animals simply off its target list?