Python Windows `msvcrt.getch()` only detects every 3rd keypress?

Question

My code is below:

import msvcrt
while True:
    if msvcrt.getch() == \'q\':    
       print \"Q was pressed\"
    elif msvcrt.getch() == \'x\':    
                


        

Answer 1

you call the function 3 times in your loop. try calling it only once like this:

import msvcrt
while True:
    pressedKey = msvcrt.getch()
    if pressedKey == 'q':    
       print "Q was pressed"
    elif pressedKey == 'x':    
       sys.exit()
    else:
       print "Key Pressed:" + str(pressedKey)

Answer 2

You can optimize things a little bit by also using themsvcrt.kbhit function which will allow you callmsvcrt.getch()only as much as is necessary:

while True:
    if msvcrt.kbhit():
        ch = msvcrt.getch()
        if ch in '\x00\xe0':  # arrow or function key prefix?
            ch = msvcrt.getch()  # second call returns the scan code
        if ch == 'q':
           print "Q was pressed"
        elif ch == 'x':
           sys.exit()
        else:
           print "Key Pressed:", ch

Note that theKey Pressedvalue printed won't make sense for things like function keys. That's because it those cases it's really the Windows scan code for the key, not a regular key code for the character.