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Date: Thu, 15 Dec 2011 11:01:14 -0800 (PST)
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Subject: Re: How to generate "a, b, c, and d"?
From: Roy Smith <roy@panix.com>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:17306

FWIW, I ended up with:

        n =3D len(names)
        if n =3D=3D 0:
            return ''
        if n =3D=3D 1:
            return names[0]
        pre =3D ', '.join(names[:-1])
        post =3D names[-1]
        return '%s, and %s' (pre, post)

the slice-and-join() takes care of both the 2 and >2 element cases at the s=
ame time :)

It would be nice if there were some standard way to do this.  I'm sure I've=
 seen something that was essentially a join() that took two delimiters; one=
 for most elements, the other a special-case for the last one.  I can't rem=
ember where I saw it.  I'm guessing in some web framework.