On 31/07/15 01:25, ltc.hots...@gmail.com wrote:
fname = raw_input("Enter file name: ") if len(fname) < 1 : fname = "mbox-short.txt" fh = open(fname) count = 0 for line in fh: if not line.startswith('From'): continue line2 = line.strip() line3 = line2.split() line4 = line3[1] print line4 count = count + 1 print "There were", count, "lines in the file with From as the first word"Question: How do I remove the duplicates:
OK, You now have the original code working, well done. To remove the duplicates you need to collect the addresses rather than printing them. Since you want the addresses to be unique you can use a set. You do that by first creating an empty set above the loop, let's call it addresses: addresses = set() Then replace your print statement with the set add() method: addresses.add(line4) This means that at the end of your loop you will have a set containing all of the unique addresses you found. You now print the set. You can do that directly or for more control over layout you can write another for loop that prints each address individually. print addresses or for address in addresses: print address # plus any formatting you want You can also sort the addresses by calling the sorted() function before printing: print sorted(addresses) 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
