I am trying to find a way to detect a keypress and then run a method depending on what key it is.
I can already do this with Tkinter. But what I can't do is detect the keypress while the window is in the background. I will be running this program in the background while I play a game. I need it to be able to detect inputs while I'm in the game.
Is there any way I can do this with Tkinter or something else? Preferably I would like to not have to download anything external as I would like to distribute this to some other people.
To detect keypress, we will use the is_pressed() function defined in the keyboard module. The is_pressed() takes a character as input and returns True if the key with the same character is pressed on the keyboard.
user_input=input("ENTER SOME POSITIVE INTEGER : ") if((not user_input) or (int(user_input)<=0)): print("ENTER SOME POSITIVE INTEGER GREATER THAN ZERO") #print some info import sys #import sys. exit(0) #exit program ''' #(not user_input) checks if user has pressed enter key without entering # number.
You could try using and : while keypressed('w') and keypressed('a'): . As for detecting if the key is released, like the keypressed , you can use the keyrelease .
In Python 2 use raw_input(): raw_input("Press Enter to continue...") This only waits for the user to press enter though. This should wait for a keypress.
Too get all the properties from your key press event. you can do the following
import pythoncom, pyHook
def OnKeyboardEvent(event):
print('MessageName:',event.MessageName)
print('Message:',event.Message)
print('Time:',event.Time)
print('Window:',event.Window)
print('WindowName:',event.WindowName)
print('Ascii:', event.Ascii, chr(event.Ascii))
print('Key:', event.Key)
print('KeyID:', event.KeyID)
print('ScanCode:', event.ScanCode)
print('Extended:', event.Extended)
print('Injected:', event.Injected)
print('Alt', event.Alt)
print('Transition', event.Transition)
print('---')
# return True to pass the event to other handlers
return True
# create a hook manager
hm = pyHook.HookManager()
# watch for all mouse events
hm.KeyDown = OnKeyboardEvent
# set the hook
hm.HookKeyboard()
# wait forever
pythoncom.PumpMessages()
Now know all the details of the key press and do operation on top of this.
pressing 's' would look like this
MessageName: key down
Message: 256
Time: 449145375
Window: 2558060
WindowName: "file name"
Ascii: 115 s
Key: S
KeyID: 83
ScanCode: 31
Extended: 0
Injected: 0
Alt 0
Transition 0
pyHook seems like it would work well for this (mentioned by furas)
from pyHook import HookManager
from win32gui import PumpMessages, PostQuitMessage
class Keystroke_Watcher(object):
def __init__(self):
self.hm = HookManager()
self.hm.KeyDown = self.on_keyboard_event
self.hm.HookKeyboard()
def on_keyboard_event(self, event):
try:
if event.KeyID == keycode_youre_looking_for:
self.your_method()
finally:
return True
def your_method(self):
pass
def shutdown(self):
PostQuitMessage(0)
self.hm.UnhookKeyboard()
watcher = Keystroke_Watcher()
PumpMessages()
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