What is the purpose of the pyautogui failsafe? - python

So, I was just messing around with pyautogui moving the mouse to random positions on the screen, when I manually moved the mouse to the top left corner of the screen and ran the program, it raised a pyautogui failsafe.
I do know how to disable it and all that, but I want to know why is is there in the first place and possible use cases
Code:
import pyautogui
pyautogui.click(x=25, y=1048)
time.sleep(2) # I moved the move to the corner of the screen during this time delay
pyautogui.click(x=701, y=430)
Error:
Traceback (most recent call last):
File "C:\1 Files and Folders\folder\Python Project\Python\CODE\My Projects\Automation.py", line 23, in <module>
job()
File "C:\1 Files and Folders\folder\Python Project\Python\CODE\My Projects\Automation.py", line 18, in job
pyautogui.click(x=1475, y=141)
File "C:\Users\My_user\AppData\Local\Programs\Python\Python39-32\lib\site-packages\pyautogui\__init__.py", line 585, in wrapper
failSafeCheck()
File "C:\Users\My_user\AppData\Local\Programs\Python\Python39-32\lib\site-packages\pyautogui\__init__.py", line 1710, in failSafeCheck
raise FailSafeException(
pyautogui.FailSafeException: PyAutoGUI fail-safe triggered from mouse moving to a corner of the screen. To disable this fail-safe, set pyautogui.FAILSAFE to False. DISABLING FAIL-SAFE IS NOT RECOMMENDED.

According to pyautogui docs
It’s hard to use the mouse to close a program if the mouse cursor is
moving around on its own.
As a safety feature, a fail-safe feature is enabled by default. When a
PyAutoGUI function is called, if the mouse is in any of the four
corners of the primary monitor, they will raise a
pyautogui.FailSafeException.
So simply FailSafe is just thing that if your program just spams the mouse or doing something that you cannot stop it, You can close that in this way, For more information read it docs pyautogui docs

Reset
pyautogui.FAILSAFE = False
at the beginning of ur script.

Related

Using python to emulate keypresses in an application

I am trying to write a python script that will type out lines from a text document as if they were coming from a keyboard.
I already have a code snippet working in some apps (see below), and this types every line from the file I open correctly, I tested the output into notepad++ for example and it types it all out.
import keyboard
import time
time.sleep(3) """ this gives me enough time to alt-tab into the game (Witcher 3)
that I am trying to have the keypresses inserted into, I also tried some code with
win32gui that brough the Witcher 3 app to the front, but this is simpler. """
with open('w3recipes.txt', 'r', encoding='utf-8') as recipes:
for line in recipes:
keyboard.write(line)
time.sleep(0.05)
The issue is that these keystrokes are not registered by Witcher 3, the game I am trying to write all these keystrokes to. I tried changing the game from fullscreen to windowed with no luck, and I tried compiling the script to a .exe and running it as an admin as well, no dice. I also tried the pynput library as opposed to the keyboard library used here and that yielded the same result.
Any help would be appreciated, I am trying to write a few hundred console commands to this game and there is no newline character in the game's console; it only supports 1 command at a time before hitting enter. My only other option is sitting here copy-pasting all the lines in which would be tiresome.
Thanks in advance.
Use another library, pydirectinput. It's an updated version of pyautogui, and I've found it works with most (if not all) games.
Quoting from docs:
This library aims to replicate the functionality of the PyAutoGUI mouse and keyboard inputs, but by utilizing DirectInput scan codes and the more modern SendInput() win32 function. PyAutoGUI uses Virtual Key Codes (VKs) and the deprecated mouse_event() and keybd_event() win32 functions. You may find that PyAutoGUI does not work in some applications, particularly in video games and other software that rely on DirectX. If you find yourself in that situation, give this library a try!
Write functions:
>>> import pyautogui
>>> import pydirectinput
>>> pydirectinput.moveTo(100, 150) # Move the mouse to the x, y coordinates 100, 150.
>>> pydirectinput.click() # Click the mouse at its current location.
>>> pydirectinput.click(200, 220) # Click the mouse at the x, y coordinates 200, 220.
>>> pydirectinput.move(None, 10) # Move mouse 10 pixels down, that is, move the mouse relative to its current position.
>>> pydirectinput.doubleClick() # Double click the mouse at the
>>> pydirectinput.press('esc') # Simulate pressing the Escape key.
>>> pydirectinput.keyDown('shift')
>>> pydirectinput.keyUp('shift')
# And this is the one you want,
>>> pydirectinput.write('string') # Write string
>>> pydirectinput.typewrite("string")

PyAutoGui the mouse wont move

I have this code:
import pyautogui
import subprocess
# iniciate the program
subprocess.call(['C:\Program Files (x86)\someprogram\someprogram.exe'])
# Abrir folder
pyautogui.moveTo(110, 54, duration=1)
pyautogui.click(clicks=1, interval=1, button='left')
but the mouse wont move it the program initiates from new, it only moves it the exec is already open, what could it be?
Its most likely a permission's issue. Have you tried running the program as an admin?

Run Upon PyAutoGUI Fail Safe

Put simply, I'm trying to figure out how to run some code when the PyAutoGUI failsafe executes. I've tried searching this problem many times and can't figure out a way to do it.
This is what I want:
Move mouse to corner and provoke failsafe.
Right before program ends from fail safe, runs line of code.
Program completely closes.
The pyautogui.FailSafeException is raised when the mouse is moved to the upper left corner (x,y of 0, 0). You could catch this exception and run code from there:
import pyautogui
import sys
while True:
try:
pyautogui.moveTo() # Any PyAutoGUI (without side effects) call will do here.
except pyautogui.FailSafeException:
print('Running code before exiting.') # Your code here.
sys.exit()

How do I have a fail safe command in python

So I'm trying to make a program that randomly places my mouse in specific areas in python, and I'm still testing it so it can get a bit crazy. I was wondering if it were possible to make a fail safe command that would terminate the program if the key or command were entered.
Since the program is clicking and moving around on another window on my computer it deselects the window python is running in, which make the "Keyboard Interrupt" fail to work.
Here's the program:
import pyautogui
import random
import time
time.sleep(6)#gives you time to click the right window
try:
while True:
x = random.randint(239, 1536) #randomizes the position of the mouse
pyautogui.moveTo(x,663) #moves the mouse to position
pyautogui.doubleClick() #fires the gun in game twise
time.sleep(1) #gives time for the game to
pyautogui.doubleClick() #catch up with the mouse and fires gun
pyautogui.doubleClick() #fires gun twice again
except KeyboardInterrupt:
print ('Yup')
And if there is anything wrong with the way I'm coding please tell me. I'm still new to coding so any tips would be awesome.
PyAutoGUI also has a fail-safe feature. Moving the mouse cursor to the upper-left corner
of the screen will cause PyAutoGUI to raise the pyautogui.FailSafeException
exception.
Your program can either handle this exception with try and except statements
or let the exception crash your program. Either way, the fail-safe feature will stop the
program if you quickly move the mouse as far up and left as you can.
>>>import pyautogui
>>>pyautogui.FAILSAFE= True
By default FAILSAFE is True, and you can also disable it.
>>>pyautogui.FAILSAFE = False
What you are looking to do is use a sys.exit() in your Exception.
Try this:
import sys
try:
# all your code
except KeyboardInterrupt:
sys.exit()
this should work, whenever you click the key it will break the loop, install the module keyboard with
pip install keyboard
if keyboard.is_pressed('q'):
break

How to use python curses module to create a key event?

I'm trying to make a key event in python. I think that with curses module i can do that but i don't know how to. Please help me.
How can i call a function with a press of a keyboard key. Like, if "space" key is pressed do something, if "c" key is pressed show image, if "s" key is pressed save image. My problem is only to make that key event.
I'm using Linux o.s.
I tried to use urwid module
and when i use this code:
import PIL
import Image
im=Image.open("im.tif")
imshow(im,cmap=cm.gray ,origin=1)
import urwid
def save(input):
if input in ('s'):
savefig("im2.png")
appeared this error:
Exception in Tkinter callback
Traceback (most recent call last):
File "/usr/lib/python2.6/lib-tk/Tkinter.py", line 1413, in __call__
return self.func(*args)
File "/usr/lib/pymodules/python2.6/matplotlib/backends/backend_tkagg.py", line 312, in key_press
FigureCanvasBase.key_press_event(self, key, guiEvent=event)
File "/usr/lib/pymodules/python2.6/matplotlib/backend_bases.py", line 1143, in key_press_event
self.callbacks.process(s, event)
File "/usr/lib/pymodules/python2.6/matplotlib/cbook.py", line 163, in process
func(*args, **kwargs)
File "/usr/lib/pymodules/python2.6/matplotlib/backend_bases.py", line 1703, in key_press
self.canvas.toolbar.save_figure(self.canvas.toolbar)
TypeError: save_figure() takes exactly 1 argument (2 given)
What am i doing wrong ? How can i make it work?
ps: I'm sorry for my ignorance but i'm very new in python.
Thank you for answer
Generating a keypress:
On Windows it is quite easy to generate keypresses. On Linux a bit more difficult:
The crude way: os.system('xvkbd -text "\\\\CP" ')
Alternatives:
Simulate keystroke in Linux with Python
Simulating Key Press event using Python for Linux
This module is interesting, uses a kernel module: http://codegrove.org/projects/python-uinput
Couldn't find mention of generating keypress events in curses.
Getting a key press:
Use of curses is a bit much for this case.
Something like: getting a char at a time would be simpler.
Easier than curses would be to use urwid.
Finally, the curses way: http://docs.python.org/release/2.6/howto/curses.html#user-input
Events such as you describe are usually associated with some sort of GUI container (window, canvas, frame, what have you) so "events" really don't have any meaning without some sort of GUI. I could give a more detailed answer if you would say what GUI framework you are using, but barring that, here are links descibing how to handle events using TKInter and WxPython

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