Serge Orlov wrote:
> Cameron Laird wrote:
>> In article <[EMAIL PROTECTED]>,
>> Edward Elliott <[EMAIL PROTECTED]> wrote:
>>> Kevin Simmons wrote:
>>>> I have a python script that prompts the user for input from stdin via a
>>>> menu. I want to process that input when the user types in two characters
>>>> and not have to have the user press <CR>. As a comparison, in the bash
>>>> shell one can use (read -n 2 -p "-->" CHOICE; case $CHOICE in...). Works
>>>> great and is very
>>> I did something like this a couple years ago, curses was the easiest way I
>>> found to do it. It's pretty painless with the wrapper function, which
>>> restores your terminal on error/exit.
>>>
>> Kevin, the bad news is that curses() is as good as Python gets in
>> this regard. For better or worse, to the best of my knowledge,
>> unextended Python caNOT implement bash's read. Here's the closest
>> small approximation I know:
>>
>> import curses
>> import os
>>
>> msvcrt = curses.initscr()
>> msvcrt.addstr("-->")
>> first = msvcrt.getch()
>> second = msvcrt.getch()
>> os.system("stty echo -nl")
>> print "\nThe two characters are '%s' and '%s'." % (first, second)
>>
>> I hope someone proves me wrong.
>
> I'm not sure what "unextended Python" means, but on POSIX platforms
> termios module can disable echo and command line option -u can disable
> buffering. I think there should be a way to disable buffering after
> program started. Probably fcntl module.
>
Thanks for your input. I found an answer that suits my needs, not curses
:-), but stty settings and sys.stdin.read(n) :
import os, sys
while 1:
os.system("stty -icanon min 1 time 0")
print """
Radio computer control program.
------------------------------
Choose a function:
po) Power toggle
fq) Change frequency
cm) Change mode
vo) Change volume
re) Reset
qu) Quit
-->""",
func = sys.stdin.read(2)
if func == "po":
...
... rest of menu actions ...
elif func = "qu":
os.system("stty cooked")
sys.exit()
Thanks again,
Kevin
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