Dnia 15-08-2009 o 08:08:14 Rascal <jonras...@gmail.com> wrote:

I'm bored for posting this, but here it is:

def add_commas(str):
    str_list = list(str)
    str_len = len(str)
    for i in range(3, str_len, 3):
        str_list.insert(str_len - i, ',')
    return ''.join(str_list)

For short strings (for sure most common case) it's ok: simple and clear.
But for huge ones, it's better not to materialize additional list for the
string -- then pure-iterator-sollutions would be better (like Gabriel's or
mine).

Cheers,
*j

--
Jan Kaliszewski (zuo) <z...@chopin.edu.pl>
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