On 14/02/15 09:55, Peter Otten wrote:
with open(headerfile) as f: lookup_header = { headerdata[:6]: headerdata.rstrip("\n") for headerdata in f}Then you can iterate over the lines in linefile, extract the key from that and look it up in the dict: with open(linefile) as lines, open("hl.dat", "w") as joined: for line in lines: try: header = lookup_header[line[:6]] except KeyError: header = "" print(line.rstrip("\n"), header, sep="", file=joined)
The try/except could be written more concisely as header = lookup_header.get(line[:6], "") HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ http://www.amazon.com/author/alan_gauld Follow my photo-blog on Flickr at: http://www.flickr.com/photos/alangauldphotos _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
