Is there a simple way to exit a while loop on keystroke?

[gsxg]

I am new to python, and have written a simple program to read a port
via telnet.  I would like it to run until any key is pressed.  Of
course I wouldn't mind requiring a specific keystroke in the future,
but I would think this is simpler for now.

I have used kbhit() and getch() many times in C, but I can't find
anything similar in  Python.  I am using Linux also, so the msvcrt
code isn't an option.  I have tried sys.stdin.read(), but that hangs
UNTIL a key is pressed.

Thanks