On Wed, 15 Dec 2004 16:10:08 +0000, rumours say that [EMAIL PROTECTED] might have written:
>> Essentially, want to do efficient grep, i..e from A remove those lines which >> are also present in file B. > >You could implement elegantly using the new sets feature >For reference here is the unix way to do it: > >sort a b b | uniq -u No, like I just wrote in another post, he wants $ grep -vf B A I think that $ sort A B B | uniq -u can be abbreviated to $ sort -u A B B which is the union rather than the intersection of the files, wastes some time by considering B twice, and finally destroys original line order (should it be important). -- TZOTZIOY, I speak England very best. "Be strict when sending and tolerant when receiving." (from RFC1958) I really should keep that in mind when talking with people, actually... -- http://mail.python.org/mailman/listinfo/python-list
