1 >>> l 2 ‘3.542485\t1.977398\t-1\r\n‘ 3 >>> l.split() 4 [‘3.542485‘, ‘1.977398‘, ‘-1‘] 5 >>> l=l.split() 6 >>> l[:2] 7 [‘3.542485‘, ‘1.977398‘] 8 >>> l[2] 9 ‘-1‘ 10 >>> l[:1] 11 [‘3.542485‘] 12 >>> l[-1] 13 ‘-1‘ 14 >>> l[-1:] 15 [‘-1‘]
python: list[-1] 与 list[-1:] 的区别
原文：http://www.cnblogs.com/monne/p/4254671.html