比方:A.txt内容
2016-06-30 23:38 <DIR> ..
2016-05-04 19:07 854,485,714 12.Monkeys.S02E02.720p.HDTV.x264-AVS.mkv
2016-05-04 18:24 885,362,520 12.Monkeys.S02E03.720p.HDTV.x264-KILLERS.mkv
最后结果B.txt
..
12.Monkeys.S02E02.720p.HDTV.x264-AVS.mkv
12.Monkeys.S02E03.720p.HDTV.x264-KILLERS.mkv
======
目前我只会单独操作一个行,不会读取文件操作
import re
str = "2016-05-04 19:07 854,485,714 12.Monkeys.S02E02.720p.HDTV.x264-AVS.mkv"
ls=str.split(" ")[-1]
print (ls)