How can I print the screen in the background with Python

Question

I would like to be able to make a screenshot of the application running in the background with Python. On each screen the application enters, I need a print. I managed to, with the pyautogui. But, it only takes screenshot of the main screen, when I leave the application running in the background, I only get the screenshots of the screen I’m on and not the application that is running.

nomeArquivo = datetime.datetime.now().strftime('%Y-%M-%d_%H%M%S' + '.png') #nome e formato do arquivo.
foto = pyautogui.screenshot() #foto sendo salva.
foto.save('C:\ProjetosPython\Testes\Evidências/' + nomeArquivo) #caminho onde salvo a foto.```

Answer 1

in his cron you have to use the export DISPLAY=:0 follows an example:

* * * * * export DISPLAY=:0; /usr/bin/python3 script.py

remembering that the display value has to be the active display. most of the time it is 0. and needs to be run by cron of the user in which the session is started. it cannot be root.

second alternative is to use the scrot

how to install: https://www.tecmint.com/take-screenshots-in-linux-using-scrot/

ex no cron:

* * * * * DISPLAY=:0 /usr/bin/scrot "/home/user/Desktop/screenshots/$(date +'\%d-\%m-\%Y \%T').png"

same thing has q per user cron and not root.