Pausing and resuming the script

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I want to make a loop that user can stop and resume, but it looks like the loop waits for user input regardless of not typing anything.

What I have tried:

I tried doing it like this, but it doesn't seem to work correctly and breaks the loop completely:

Python

while True:
print(" ")
print("Info will now update every 30 seconds (if you want to stop this, type stop)")
if input() == "stop":
  print ("\nstoping...")
  time.sleep(2)
  print ("Stopped successfully, you can resume by typing resume")
  time.sleep(999999999999999999999999999999999999999999999999999999999999)
  if input() == "resume":
    print("\nResuming...")
    repeat2()
    time.sleep(2)
else:
  repeat2()
  time.sleep(30)

Posted 29-Sep-23 21:23pm

Jaromir Wach

Updated 1-Oct-23 8:29am

Deeksha Shenoy

v2

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2 solutions

Solution 2

Here is a quick and dirty solution that does not require the use of threads:

Python

while True:
    try:
        print("working")
        # do other work here
        time.sleep(3)

    except KeyboardInterrupt:
        print("interrupted")
        while True:
            if input("Resume?") == "y":
                break
            # also check if application should terminate
            time.sleep(2)

Pressing Ctrl-C whil the "working" message is displayed, raises the KeyboardInterrupt exception, which causes the second loop to be entered. Answering anything other than "y" to the "Resume?" message, pauses the work in the main loop.

Posted 29-Sep-23 22:43pm

Richard MacCutchan

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OriginalGriff · Accepted Answer · 2023-09-29T21:40:00

Look at your code:

Python

print ("Stopped successfully, you can resume by typing resume")
time.sleep(999999999999999999999999999999999999999999999999999999999999)
if input() == "resume":

The parameter to sleep is the number of seconds to wait before executing the next statement!
That code will wait for 3 * 10⁵² years before continuing ... in theory. In practice your computer will have died many, many megayears before that.

You would probably have to look at multithreading your app to do what you want: multithreading python - Google Search[^] you will find a lot of info there, but be aware that this is not a novice subject, and you have to think really carefully before converting to a multithreaded app.

Pausing and resuming the script

2 solutions

Solution 1

Solution 2

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