while (assignment):

Peter Abel p-abel at t-online.de
Tue Jul 29 23:00:56 CEST 2003


Sybren Stuvel <sybrenUSE at YOURthirdtower.imagination.com> wrote in message news:<slrnbicopb.6gh.sybrenUSE at sybren.thirdtower.com>...
> Hi there,
> 
> Is it possible to use an assignment in a while-loop? I'd like to do

No I guess.
This is typical C, to use an assignment and work with its result
in the same statement.
One famous representative is the following which is the reason
for many faults:
if (a=somethting)
{
...
}

what means in pyhton:

a=something
if a:
 ...

 

> something like "loop while there is still something to be read, and if
> there is, put it in this variable". I've been a C programmer since I
> was 14, so a construct like:
> 
> while info = mydbcursor.fetchone():
> 	print "Information: "+str(info)
> 

The following should work:

info = mydbcursor.fetchone()
while info:
  print "Information: "+str(info)
  info = mydbcursor.fetchone()


> comes to mind. Unfortunately, this doesn't work. Is there a similar
> construct in python?
> 
> Sybren

Regards
Peter




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