Newbie: Why Does This Work This Way...Global Variables And The Signal Module....

[Ignacio Vazquez-Abrams]

On Fri, 14 Sep 2001, John Branthoover wrote:

>     OK,  that makes sense.  Is there not away to define a global variable
> once for all of the functions in the module?

Nope. At least not that I know of.

>     Or better yet,  is there a better way to break out of a endless loop.
> The loop will display some values continuously.  I want to be able to get
> out of this loop and go back to a main menu.  I am working on an Lynx box
> (not Linux) with no GUI or even curses support.

The following will run until you press enter:

---
import sys, select

def run():
  while 1:
    e=select.select([sys.stdin], [], [], 0)
    if not e==([], [], []):
      c=sys.stdin.read(1)
      if c=='\n':
        break
    print "You can't catch me, I'm the gingerbread man!"

run()
print "D'oh! You caught me!"
---

There's no reason why it couldn't catch another character if the select()
function returns on any keypress, which it doesn't seem to on Linux :/

Also, if you can put a termcap/terminfo into the Lynx box, you may be able to
get (n)curses working.

-- 
Ignacio Vazquez-Abrams  <ignacio at openservices.net>