I want my configuration menu to open at the start of a script if the Ctrl key is being pressed. That is, the user would start pressing the key before the script starts running.
To intercept that I have tried keyboard.is_pressed('ctrl'), but it always returns false.
I have also tried keyboard.read_key but this method gives me two problems:
If it is not pressed, the program does not continue running.
If it is pressed, it just continues running only when I release the control key.
Maybe I just need to think of another way to open this menu.
I'm assuming you're using the keyboard module for this. Looking through the code, it seems like that library is event based, so if the CTRL key is pressed before your program starts, then it isn't recognized by the program.
My recommendation would be to read directly from stdin using the sys library. However, looking at How to get Ctrl, Shift or Alt with getch() ncurses?, it seems like CTRL, ALT, and SHIFT don't generate their own input to stdin but rather modify existing input, so you should probably look at using another key as your modifier. You also need a timeout, which Read file with timeout in Python suggests the select module provides. In case you don't know already, sys.stdin is your standard input, and you can treat it like any other file.
Assuming my code is going to run on Windows and thanks to my experience in C++ I came up with the win32api module.
# Windows module to controll the keyboard
import win32api
# Windows module with every key code
import win32con
# Check whether the control key is pressed
if win32api.GetAsyncKeyState(win32con.VK_CONTROL) & 0x8000 > 0:
# Do stuff
Related
I am using Linux Mint 20 with Python 3. I am a complete noob with Python. However, I am trying to set up a keyboard shortcut to display certain text wherever my cursor is at in the active window (an input box, text editor, etc.). I know how to set up shortcuts and run simple python programs in Terminal.
It seems I have to use some type of GUI interface? I have looked at GTK and pkinter, but I can't seem to figure out the correct code. Would rather use GTK or something that already comes with the system.
Thanks.
You can use the pynput module to make keypresses wherever the cursor is. Here is an example:
import pynput
from pynput import keyboard
string_to_type = "Hello! How are you?"
c = keyboard.Controller()
for char in string_to_type:
c.tap(char)
c.tap() presses and then quickly unpresses the key passed as an argument.
You can also call c.press() and c.unpress(), both of which require an argument representing a key. This enables you to hold down keys.
Hi,
I am working on a project and I am monitoring the keyboard with the keyboard module.
My application works in real-time (on-the-fly) and read strings entered from user (with the keyboard module as mentioned)
What I want to do is hide user input when some specific conditions are True.
I have searched all the web and didn't manage to find something that does what I want.
To give it a more detailed explanation lets say that the user enters some text and this text string-by-string is being checked for some condition from my program.
If everything is OK, then nothing happens but if not, then I want the next user input not to be shown in the position he is writing.
I found solutions that do exactly this in the terminal like the msvcrt module (How to temporarily disable keyboard input using Python ) or do the above functionality with the input() function.
Is there something that prevent the text ,entered from the keyboard, from showing to the screen, but send it to a buffer for editing first.
Thanks in advance.
! I am on windows
I want to detect if Ctrl + X is clicked so that I can exit my Python application. I don't know how to do it? Please help.
Have you thought about using a function like the ones discussed here? Python read a single character from the user
Or maybe you could use curses.
Either way you would just need to find the key code for ctrl-X, it's 24.
The simple and the best option is to use the module keyboard. Install it using pip install keyboard.
Use the following code at the start of your code:
import keyboard as k
k.add_hotkey("ctrl+x",lambda: quit())
#Your code....
Well, it works easily, but, it will read keys from the whole windows. For example the program is running and you are using notepad currently and you pressed ctrl+x , then the python program will close too.
so Im trying to write a program that needs to log keystrokes. I have this current script:
def __call__(self):
ch=msvcrt.getch()
if ch in b'\x00\xe0':
ch=msvcrt.getch()
return ch
this works for basic keys but does not show arrowkeys, backspace, enter. it also does not work outside of the program window. how would i make it run outside of the window and log these other keys on Windows?
I would suggest using pyHook and following one of the demos they have. It is an external library that you can use that allows you to monitor global keyboard and mouse events.
I have to write a script to emulate some keyboard event in a different program in background.This is my codeļ¼
pwin = win32ui.FindWindow(None,r'someprograme')
pwin.SendMessage(win32con.WM_KEYDOWN,18)
pwin.SendMessage(win32con.WM_KEYDOWN,68)
pwin.SendMessage(win32con.WM_KEYUP,18)
pwin.SendMessage(win32con.WM_KEYUP,68)
pwin.SendMessage(win32con.WM_KEYDOWN,13)
pwin.SendMessage(win32con.WM_KEYUP,13)
But it seems nothing happened.So what should i do?I've tried PostMessage func it seems it still can not do it.
After a quick look at the WM_KEYDOWN docs:
Posted to the window with the keyboard focus when a nonsystem key is pressed. A nonsystem key is a key that is pressed when the ALT key is not pressed.
But looking up your keycodes, you're trying to send ALT-D (followed by ENTER, which is fine). It sounds like you're trying to drive the menus; if that's what you want to do, WM_KEYDOWN is not the way to do it.
The problem is that keyboard menu navigation is driven by Windows, not by the app (except for a handful of apps that override normal menu processing, like some versions of Visual Studio). When you're looking at Notepad, and you hit ALT-F to open the File menu, the Notepad code gets a bunch of menu-related messages (WM_INITMENU, etc.), not the keystrokes.
If you use a WM spy program (I think the free Visual Studio Express still comes with Spy++ and ManagedSpy, but if not, search for an equivalent), you can see what the application is actually seeing when you drive it with the keyboard, and then you can figure out how to emulate that from your Python script.
On top of everything else, depending on how the program is written, it may not accept keystrokes when it doesn't have focus.
By the way, if you're just getting started with Windows GUI automation, you might want to look at something higher level, like pywinauto. That way, you don't have to work out what menu-related messages to send to open the Data menu; you just do something like app.Foo.MenuSelect('Data').