How to concatenate list members

[Daniel Klein]

On Thu, 30 May 2002 14:02:38 +0200, "Ruediger Maehl"
<ruediger.maehl_nospam at web.de> wrote:

>Hello Pythoneers,
>
>I would like to concatenate all members of a list of strings.
>How can I do that?
>I know, I can use a for loop over all elements and concatenate
>them to one string. But is there another more efficient solution?
>
>Rüdiger
>
># ===========================================
>def concat1(alist, sep=" "):
>    res = ""
>    for e in alist:
>        res += str(e)
>        res += sep
>
>    return res[:-1]
>
>a = ["200100002", "200100003", "200100004"]  # many many more to come ...
>
>b = concat1(a, "_")
>
>print b
>
># and b then looks like this:
># "200100002_200100003_200100004"


Try this:

def concat1(alist,sep=" "):
    return sep.join(alist)

I think you need at least Python2.0 for this. Otherwise change it to:

import string
def concat1(alist, sep=" "):
    return string.join(alist,sep)


Daniel Klein