Bidirectional communication through pipes: read/write popen()

[Oleg Broytmann]

On Sun, 17 Oct 1999, Fredrik Lundh wrote:
> Oleg Broytmann <phd at sun.med.ru> wrote:
> > On 17 Oct 1999, Hrvoje Niksic wrote:
> > > def rwpopen(input, command, args=[]):
> >                               ^^^^^^^
> >    There was well-know problem with passing mutable object as a default.
> > Not sure if it was fixed in recent versions of Python...
> 
> well, that's only a problem if you modify the object
> inside the function...

   Sooner or later you forget about it and modify args and what? :) No, I
better will avoid this completely until Python fixes it.

> (and no, it hasn't been fixed.  I doubt it can be
> fixed without breaking stuff).

   Mmm??? Are there a line of code that *relies* on that misfeature?

Oleg.
---- 
    Oleg Broytmann  National Research Surgery Centre  http://sun.med.ru/~phd/
           Programmers don't die, they just GOSUB without RETURN.