What for a file that prints nothing

[sylas]

Hi all ! I have this file that prints nothing. How to modify in order to see something ??

class _Getch:
    """Gets a single character from standard input.  Does not echo to the
screen."""
    def __init__(self):
        try:
            self.impl = _GetchWindows()
        except ImportError:
            self.impl = _GetchUnix()

    def __call__(self): return self.impl()


class _GetchUnix:
    def __init__(self):
        import tty, sys

    def __call__(self):
        import sys, tty, termios
        fd = sys.stdin.fileno()
        old_settings = termios.tcgetattr(fd)
        try:
            tty.setraw(sys.stdin.fileno())
            ch = sys.stdin.read(1)
        finally:
            termios.tcsetattr(fd, termios.TCSADRAIN, old_settings)
        return ch


class _GetchWindows:
    def __init__(self):
        import msvcrt

    def __call__(self):
        import msvcrt
        return msvcrt.getch()


getch = _Getch()#origin
#char = getch.getche() # also displayed on the screen
#char = _Getch() # also displayed on the screen

[gruntfutuk]

That's a pretty old library, and doesn't work on macOS (just tried it). You might want to look at a more recent alternative (which I think might be based on the ActiveState recipe you shared).

readchar 2.0.1 on PyPi

I tried it in the shell, and it worked fine with this code:

import readchar
while True:
    key = readchar.readkey()
    if key == " ": break

Obviously, I could print whatever character was read (assuming it was printable character).