do...while
Andrae Muys
amuys at shortech.com.au
Thu Jun 20 20:22:54 EDT 2002
"Sean 'Shaleh' Perry" <shalehperry at attbi.com> wrote in message news:<mailman.1024595068.19382.python-list at python.org>...
> On 20-Jun-2002 Michael P. Soulier wrote:
> > Greetings.
> >
> > How do you people handle the lack of a do...while in Python? I find that
> > at times, I must initialize variables for a loop with identical code to the
> > loop, which feels like a waste to me.
> >
> > ie.
> >
> > line = filehandle.readline()
> > while len(line) > 5:
> > line = filehandle.readline()
> >
> > A do...while here would be nice.
> >
> > Just curious.
> >
>
> while 1:
> line = filehandle.readline()
> if len(line) <= 5: break
> ....
> ....
>
> is a typical way to implement it.
or if you prefer to avoid the implied infinate loop...
for line in filehandle:
if len(line) <= 5: break
....
I haven't tested for any interaction with this and any
read-ahead-buffering, however the documentation defines the behaviour
as being repeated calls to readline() so it should work fine.
Andrae Muys
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