"persistent" plot windows

[Rodrigo Lopez-Negrete]

Hi all,

I'm trying to write a python script using plotting form pylab.
Unfortunatelly I've encountered a problem. When I run the script via
'python myscript.py' the plot windows open and close very quickly, or
when I added the show() command the shell window was locked until I
closed the figures.

My question is: is there a way to open those windows in the background
without blocking the shell and without running it interactively??
something like gnuplot -persist?

Thanks all,
  Rodrigo Lopez-Negrete