After a little trial and error, it appears that Python caches the values in range(-5,257). > -6 + 0 is -6 False > -5 + 0 is -5 True > 256 + 0 is 256

After a little trial and error, it appears that Python caches the values in range(-5,257). > -6 + 0 is -6 False > -5 + 0 is -5 True > 256 + 0 is 256 True > 257 + 0 is 257 False