[Tutor] Strange join syntax
Tom Jenkins
tjenkins@devis.com
26 Apr 2002 15:09:33 -0400
On Fri, 2002-04-26 at 14:03, Scot Stevenson wrote:
> Hello Remco,
>
> While talking about list reverse, you gave an example that included
>
> > drow = ''.join(wordlist)
>
> I tried this construction myself, and I see that it works, but I'm not
> sure if I understand what is happening here. My docs [Python 2.1.1, yes
> I'll be updating when I have time to install SuSE 8.0] say:
well this is a change that was added to 2.0+ that I frankly think
detracts from the readability of python (not that i can think of a
different way off the top of my head)
previous versions had a string module, so you would have to say:
import string
drow = string.join(wordlist, '')
starting in 2.0, you didn't need to import string, because strings now
had methods (basically the functions from the string module). so by
saying
drow = ''.join(wordlist)
you were saying "join the list wordlist using the string '' (empty
string) as the delimiter"
>
> =================
> join(words[, sep])
> Concatenate a list or tuple of words with intervening occurrences of sep.
> The default value for sep is a single space character. It is always true
> that "string.join(string.split(s, sep), sep)" equals s.
> =================
>
or in version 2+ terms
sep.join(words)
ython.org/mailman/listinfo/tutor
--
Tom Jenkins
Development InfoStructure
http://www.devis.com