[Tutor] Converting a list to a string

[Michael P. Reilly]

Daniel Yoo wrote
> 
> On Mon, 7 May 2001, Praveen Pathiyil wrote:
> 
> > If i have a list 
> > status = ['tftp>', 'Sent', '1943', 'bytes', 'in', '0.0', 'seconds'],
> > is there a single command which will give me a string 
> > tftp> Sent 1943 bytes in 0.0 seconds
> > 
> > OR do i have to do 
> > 
> > stat_str = ''
> > for elt in status:
> >     stat_str = stat_str + ' ' + elt
> 
> People have suggested using string.join(), which is how I'd approach this
> problem.
> 
> However, if you already know how many elements are in your status list,
> you can also use string interpolation toward the cause.
> 
>     stat_str = "%s %s %s %s %s %s %s %s" % tuple(status)
> 
> would work, assuming that status is an 8-element list.

Likewise, if you don't know how many:
>>> if status:  # there's at least one
...   spam_str = '%s' + ' %s' * (len(status)-1)
...   stat_str = spam_str % tuple(status)
... else:
...   stat_str = ''
...

But I think join is faster than this. ;)

  -Arcege

-- 
+----------------------------------+-----------------------------------+
| Michael P. Reilly                | arcege@speakeasy.net              |