Since import msvcrt in Python is Windows specific, I adapted some code
I found to provide kbhit() and getch() in Python under Linux.
I'm attaching KBHIT.py which replaces msvcrt and a small program to
demonstrate how to use it - KBHIT-test.py.
The KBHIT.py documentation includes usage instructions and also a link
to the code I borrowed and (I hope) improved.
--
Shlomo Solomon
http://the-solomons.net
Claws Mail 3.11.1 - KDE 4.14.30 - Dolphin 4.14.3 - LINUX Mageia 5
""" KBHIT-test.py
Shlomo Solomon
program to demonstrate the use of kbhit and getch in LINUX """
import KBHIT
kbd = KBHIT.KBHit() # define a keyboard object
def get_input():
""" use kbhit and getch to get keyboard input """
key_code = 0
key_char = None
if kbd.kbhit():
print "hit ",
key_char = kbd.getch()
key_code = ord(key_char)
if key_code == KBHIT.ENTER:
print "ENTER"
elif key_code == KBHIT.TAB:
print "TAB"
elif key_code == KBHIT.BACKSPACE:
print "BACKSPACE"
elif key_code == KBHIT.ESC:
print "ESCAPE"
else:
print key_char, "code=", key_code
return key_code, key_char
def main():
""" main runs until Escape is hit """
print "Starting test program - waiting for input"
print "Hit ESC to end the test"
key_code = 0
while key_code != KBHIT.ESC:
key_code, key_char = get_input()
print "End of test"
if __name__ == "__main__":
main()
"""
KBHIT.py
A Python class to implement kbhit() and getch()
adapted by Shlomo Solomon from http://home.wlu.edu/~levys/software/kbhit.py
NOTES- This version has been tested on LINUX, but should work on Windows too
- the original code also had getarrow() which I deleted in this version
- works with ASCII chars, ENTER, ESC, BACKSPACE - NOT with special keys
- Does not work with IDLE.
>>>>> 2 ways to use in LINUX - the 2nd one is better!!
>>>>>>> 11111 >>>>>>>>>>>>>
from KBHIT import KBHit
kbd = KBHit()
Then use as follows:
if kbd.kbhit():
print kbd.getch()
optionally - add the following constants:
ENTER = 10
ESC = 27
BACKSPACE = 127
TAB = 9
>>>>>>>>>>>>>>>>>>>
>>>>>>> 22222 >>>>>>>>>>>>>
import KBHIT
kbd = KBHIT.KBHit()
Then use as follows:
if kbd.kbhit():
print kbd.getch()
the constants mentioned in the first method will be available as:
KBHIT.ENTER, etc
>>>>>>>>>>>>>>>>>>>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
"""
import os
if os.name == 'nt': # Windows
os = 'nt'
import msvcrt
else: # Posix (Linux, OS X)
os = 'LINUX'
import sys
import termios
import atexit
from select import select
# special key definitions
ENTER = 10
ESC = 27
BACKSPACE = 127
TAB = 9
class KBHit:
""" this class does the work """
def __init__(self):
"""Creates a KBHit object to get keyboard input """
if os == 'LINUX':
# Save the terminal settings
self.fd = sys.stdin.fileno()
self.new_term = termios.tcgetattr(self.fd)
self.old_term = termios.tcgetattr(self.fd)
# New terminal setting unbuffered
self.new_term[3] = (self.new_term[3] & ~termios.ICANON & ~termios.ECHO)
termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.new_term)
# Support normal-terminal reset at exit
atexit.register(self.set_normal_term)
def set_normal_term(self):
""" Resets to normal terminal. On Windows does nothing """
if os == 'LINUX':
termios.tcsetattr(self.fd, termios.TCSAFLUSH, self.old_term)
def getch(self):
""" Returns a keyboard character after kbhit() has been called """
if os == 'nt':
return msvcrt.getch().decode('utf-8')
else:
return sys.stdin.read(1)
def kbhit(self):
""" Returns True if keyboard character was hit, False otherwise. """
if os == 'nt':
return msvcrt.kbhit()
else:
dr, dw, de = select([sys.stdin], [], [], 0)
return dr != []
# Test
if __name__ == "__main__":
""" main() tests the kbhit() and getch() functions """
kbd = KBHit()
print'Hit any key, or ESC to exit'
while True:
if kbd.kbhit():
print "HIT ",
char_hit = kbd.getch()
if ord(char_hit) == ESC:
print "ESC - ending test"
break
print char_hit, ord(char_hit)
kbd.set_normal_term()
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