Sorting email addresses by domain

From: Peter Murray (pdmurray_at_ntlworld.com)
Date: 11/11/04

  • Next message: John Machin: "Re: Announce: csv_xs.py" 
    To: <python-list@python.org>
Date: Thu, 11 Nov 2004 01:58:35 -0000

    Hi! I hope someone can assist me, I have been using Python for a year or
    two, but I am not a programmer and only use it occasionally for small issues
    or just for fun. So I perhaps do not have the right 'mindset' to always see
    the answer to a problem.

    Anyway, I have a list of email address and I want to sort them by domain.
    List.sort() wont work as this looks at the start of each address only. So
    the answer I have come up with is to split each email address around the
    "@", swap the position of the name and domain, build a new list with these
    and then sort this. Then switch positions back, and join with an "@". It
    works, but it seems a little inelegant. Is there a better, or easier way to
    do this?

    Code is below. Thanks for any comments!

    Pete.

    def sortlist(addresslist):
        l1 = []
        for i in addresslist:
            temp = i.split("@")
            temp[0], temp[1] = temp[1], temp[0]
            l1.append(temp)
        l1.sort()
        l2 = []
        for i in l1:
            i[0], i[1] = i[1], i[0]
            temp = "@".join(i)
            l2.append(temp)
        return l2

  • Next message: John Machin: "Re: Announce: csv_xs.py"

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