I'm currently working on a script that presses the 'w,a,s,d' keys in order to move a character in any game.
For this to work, i need to have the 'w' key pressed for a specific amount of time. How can I achieve this?
I thought of something like:
pyautogui.keyDown('w')
time.sleep(2)
pyautogui.keyUp('w')
But this just pauses the whole program and no key is being pressed so this has no use to me.
As said in the doc-string from pyautogui.keyDown():
Performs a keyboard key press without the release. This will put that
key in a held down state.
NOTE: For some reason, this does not seem to cause key repeats like would
happen if a keyboard key was held down on a text field.
You need a different approach - you can may use pygame - with this
Or, if you want to stay with pyautogui you can try something like this:
def hold_W (hold_time):
import time, pyautogui
start = time.time()
while time.time() - start < hold_time:
pyautogui.press('w')
with pyautogui.hold(key):
pyautogui.sleep(hold)
This will do the trick without making your own function.
Related
I have been recently trying to create a program that makes new folder in python(pyautogui).
Here is my code:
import pyautogui;# import the library
pyautogui.press('ctrl');# makes our program to press 'ctrl'
pyautogui.press('n');# makes our program to press 'n'
Apparently what it does instead is pressing ctrl and n individually and I want from them to be pressed together. Please help.
According to the docs:
The press() function is really just a wrapper for the keyDown()
and keyUp() functions, which simulate pressing a key down and then
releasing it up.
As you want to combine several key presses, you need to call keyDown() and keyUp() separately:
pyautogui.keyDown('ctrl')
pyautogui.press('n')
pyautogui.keyUp('ctrl')
I have been facing this problem for the last week,I thought it would be trivial but after trying many different approaches I don't know what else to try.
I have an application where I need to have key detection (to move a robot arm with the keyboard) but when I press enter I need to add some inputs, which should be as long as I want, just some normal input("insert here").
I know about the python libraries to get key detection, I got pynput to work successfully but it crashes my raspberry pi when I start and stop the threads a few times,I tried the Keyboard library but the whole root requirement is a let down, I also got curses to work and this seems to be solid and is (almost) not causing any issues, so detecting 1 key is not a problem.
I of course know how to name my files and get all the information that I need by doing input(), so if I had to use one of those options the job would be rather simple, the challenge comes when I try to apply both approaches together, basically detect the keys to do everything I need, and use python Input to get all the inputs from the user as soon as enter is pressed, all the libraries to detect key seems to take full control and they don't want to release it without a fight. They seem to expect the user to always require single key detection but in my case I would need to constantly turn it on and off, I couldn't figure out any efficient (or not) way to get it to work properly.
My question is:
What is the best approach to have key detection + full user input when needed with curses (or any alternative) in a non blocky way (as my code need to do some other things while listening for keys), is creating and destroying the whole thing the only alternative?
This is my current test code that I created for simplicity (which works but blocks everything while listening for keys):
import curses
import time
import os
stdscr = None
addInput = False
def SetupCurses():
global stdscr
stdscr = curses.initscr()
curses.cbreak()
stdscr.keypad(1)
def StartCurse():
global addInput
key = ''
while key != ord('q'):
key = stdscr.getch()
stdscr.addstr(str(key))
if key == ord('a'):
print("\nyou pressed a\n")
if key == 10:
print("\nyou pressed enter!\n")
addInput = True
break
def EndCurse():
curses.endwin()
while(True):
SetupCurses()
StartCurse()
EndCurse()
if addInput:
theinput = input("add your input\n")
print(theinput)
time.sleep(4)
addInput = False
#if there isn't any input to add I want the code to continue because there is non-related keys stuff to do, but of course it stopped at "StartCurse"
#if there is something to add the code can stop at addInput
The reason for the loop is because the user can save as many positions as he want, so after adding some inputs the possibility of adding more is there.
I saw people making this non-blocking by closing the curses loop after a few seconds (which stops everything anyway...) kind of getting the input by luck...something like:
def ExecuteCurses():
global AddInput
#open it and close it very quickly to grab a key if it is pressed
c = stdscr.getch()
if c == ord('a'):
print("you pressed a")
AddInput = True
time.sleep(1)
curses.endwin()
If you want a full and long user input you will need to use the curses.echo() and then use the stdscr.getstr(). That will wait for the user to press enter().
And to not block the program while getting input you need threading which you will have to import at the top of your program
And for the threading here is a link so you can find out more about threading.
I hope it answers your question
I am trying to write a program that captures at any time which key is being pressed. The ultimate goal is to control a robot from the keyboard, e.g. using wasd keys to control movement. It's rather easy using pygame, but as I want to be able to access my robot over SSH, I am looking for a purely bash-based solution. The curses library seems to be the way to go (but please let me know if there is a better solution). I now have something like this:
import curses
def main(screen):
screen.timeout(50)
key = ''
while key != 'q':
try:
key = screen.getkey()
screen.addstr(0, 0, 'key: {:<10}'.format(key))
except:
screen.addstr(0, 0, 'key: {:<10}'.format('N/A'))
if __name__ == '__main__':
curses.wrapper(main)
which largely works fine, except for some unexpected behaviour: when I press and hold a key, it very briefly (and only once) alternates between the key in question and the 'N/A' fallback, as if I press and release and then press and hold.
I think my issue is caused by the character repeat delay setting on my machine. Indeed, if I increase the curses timeout setting to half a second, the problem is 'solved', but I want my program to be more responsive than half a second. Any way I can overrule the character repeat delay within my program? Or alternative solutions?
Note: Not sure if this is relevant, but I am using bash on Windows 10 (WSL) for testing purposes, and would ultimately like to run it on Raspbian.
I'm currently working on a script that presses the 'w,a,s,d' keys in order to move a character in any game.
For this to work, i need to have the 'w' key pressed for a specific amount of time. How can I achieve this?
I thought of something like:
pyautogui.keyDown('w')
time.sleep(2)
pyautogui.keyUp('w')
But this just pauses the whole program and no key is being pressed so this has no use to me.
As said in the doc-string from pyautogui.keyDown():
Performs a keyboard key press without the release. This will put that
key in a held down state.
NOTE: For some reason, this does not seem to cause key repeats like would
happen if a keyboard key was held down on a text field.
You need a different approach - you can may use pygame - with this
Or, if you want to stay with pyautogui you can try something like this:
def hold_W (hold_time):
import time, pyautogui
start = time.time()
while time.time() - start < hold_time:
pyautogui.press('w')
with pyautogui.hold(key):
pyautogui.sleep(hold)
This will do the trick without making your own function.
Is there anyway for python 3 to recognise a keypress? For example, if the user pressed the up arrow, the program would do one thing whereas if the down arrow was pressed, the program would do something else.
I do not mean the input() function where the user has to press enter after the keypress , I mean where the program recognises the keypress as some as it was pressed.
Is this question too confusing? xD
Python has a keyboard module with many features. You Can Use It In Both Shell and Console.
Install it, perhaps with this command:
pip3 install keyboard
Then use it in code like:
import keyboard #Using module keyboard
while True: #making a loop
try: #used try so that if user pressed other than the given key error will not be shown
if keyboard.is_pressed('up'): #if key 'up' is pressed.You can use right,left,up,down and others
print('You Pressed A Key!')
break #finishing the loop
else:
pass
except:
break #if user pressed other than the given key the loop will break
You can set it to multiple Key Detection:
if keyboard.is_pressed('up') or keyboard.is_pressed('down') or keyboard.is_pressed('left') or keyboard.is_pressed('right'):
#then do this
You Can Also Do Something like:
if keyboard.is_pressed('up') and keyboard.is_pressed('down'):
#then do this
It Also Detect Key For The Whole Windows.
Thanks.
I assume this is a gui program,
If using the built-in gui module Tkinter, you can use bind to connect a function to a keypress.
main.bind('<Up>', userUpkey)
Where userUpKey is a function defined in the current scope.