Use while loop to listen for an event?

Question

I am trying to write a small clipboard logger (for linux) that listens for an event (changing the contents of the clipboard) and writes the contents of the clipboard to a file (on-change).

What I came up with is a simple while loop with the pyperclip clipper module:

import pyperclip

recent_value = ""
while True:
    tmp_value = pyperclip.paste()
    if tmp_value != recent_value:
        recent_value = tmp_value
        with open(".clipboard_history.txt", "a") as f:
            f.write(recent_value + "\n")

So, my first question is: can I actually run a True loop to “listen”, or will it be too much memory or generally ineffective or bad practice?

And the second question: how can I run this in the background, like shell job management (ampersand)?

Should I go for a demon, such as the one offered here, or some kind of event loop or flow magic?

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Answer 1

, time.sleep(1) - , ( 0,1-2 , , /)

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Answer 2

, : True? "", ?

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time.sleep(0.1)

script , . : ,

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Answer 3

, :

while True:
    tmp_value = pyperclip.paste()
    if tmp_value != recent_value:
        recent_value = tmp_value
        with open(".clipboard_history.txt", "a") as f:
            f.write(recent_value + "\n")

, script , , loop , threading :

from threading import Thread
t = Thread(target=your-func, args=[])
t.start()

def your-func(self):
    # your loop goes here

Answer 4

To run a python file without a console, the extension must be .pyw, for example, when launched, logger.pywit will be launched without opening the python shell.

Hope this answers your question.