Как завершить процесс python?
Сейчас надо внести изменения в один из файлов но не могу завершить работу бота телеграм. После ввода команды в консоль он продолжает работать ((
какие есть еще команды для убийства процесса?
- Вопрос задан более года назад
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этой командой он вывел процессы не относящиеся к моей конкретной директории.
а через Putty дал так
Last login: Mon Feb 28 05:59:38 2022 from 178.166.210.107
root@templ-ubuntu-2004:
# cd /root/bots/botdelete_test
root@templ-ubuntu-2004:
/bots/botdelete_test# ps
PID TTY TIME CMD
1408 pts/0 00:00:00 bash
1417 pts/0 00:00:00 ps
root@templ-ubuntu-2004:
или я что то не так делаю?
мне нужно остановить бота не выключая сервер. так как если остановлю сервер, то заменить файл не смогу (
How to PROPERLY exit script in Python [3 Methods]
Python scripts or programs run forever unless the execution reaches the end of the program or is exited explicitly. Python provides different ways and methods to quit from script or program. In this tutorial, we will learn how we can explicitly exit the python program by using different methods.
We will learn about exit() , sys.exit() , and quit() methods and will discuss how they exit the python program by taking various examples. At the same time, we will also cover how we can exit the program in the middle of a function and when a condition is satisfied. In a nutshell, this tutorial will contain all the necessary methods that you need to know in order to exit the python program.
Getting started with Python exit script
Python exit script refers to the process of termination of an active python process. It is simply a call to a function or destructor to exit the routines of the program. This process is done implicitly every time a python script completes execution, but could also be invoked by using certain functions. In the following sections, we will discuss some of these functions by taking various examples.
Python exit script using exit() method
The Python exit() method is also included inside the site module of Python. The site module is the target directory of manually built Python packages. When we build and install Python packages from the source, we will find the installed modules in the site module/packages by default. The following is the simple syntax of the Python
exit() method.
The exit method does not take any mandatory argument. All the Python statements after the exit() method will not be executed.
Examples of Python exit script using exit() method
Now let us take an example and see how the python exit() method works. See the python program below:
Notice that the Python statement after the exit() method was not executed. If we will use the exit() method inside a loop, then the execution of the loop will stop after executing the exit() method. See the example below:
Although the loop was an infinite loop, it stopped executing once it reached to the exit() method.
Python exit script using sys.exit( ) method
The sys module in Python provides various functions and variables that are used to manipulate different parts of the Python runtime environment. It allows operating on the interpreter as it provides access to the variables and functions that interact strongly with the interpreter. One of the methods available in this module is the exit method that ends the execution of the Python script. The following is the simple syntax of this method.
This method also does not require any argument.
Examples of Python exit script using sys.exit() method
Now let us take an example and see how the sys.exit() method works. See the Python program below:
Notice that the python script stopped executing after the sys.exit() method has been executed. If we will use the same method inside any python loop, then it will stop too, after executing the sys.exit() method. See the example below:
Notice that the loop was supposed to execute 100 times but because of the sys.exit() method, it stopped executing.
Python exit script using quit() method
Another built-in method to exit a python script is quit() method. When the program encounters the Python quit() function in the system, it terminates the execution of the program completely. The following is the simple syntax of the quit() method.
This method also does not require any argument as it is used to terminate the python script completely.
Examples of Python exit script using quit() method
Now let us take an example and see how the Python quit() method works. See the python program below:
Notice that the python statement after the quit() method was not executed because the quit() method has terminated the program. If we will use this method inside any of the python loops, then the program will terminate once this method is executed. See the following example.
Notice that even the loop was supposed to be executed 100 times but because of the quit() method, it terminates.
Python exit script in a function
A Python function is a group of code. To run the code in a function, we must call the function. A function can be called from anywhere after the function is defined and it can return a value using a return statement. In this section, we will see how we can use the python exit script inside the Python function.
Example of python exit script in the return statement
Now let us see how we can use the Python exit script as a return statement in our function. See the example below:
Notice that the condition was false so the else part of the function was executed which returns exit and terminates the program.
Example of Python exit script in the middle of a function
If we want to terminate the function in middle without using a return statement, we can do it. See the python program below which terminates the function in the middle without using any return statement.
Notice that the function did not have any return statement but still uses the exit method and terminates the program.
Python exit script when a condition is satisfied
If we have a loop in our Python code and we want to make sure the code can exit if it encounters a problem, we can use a flag/condition that it can check to terminate the program. See the python program below:
Notice that the loop was terminated when the condition becomes true and the exit method was executed.
Python exit script with a message
As we already discussed in the above sections that the exit method does not take any mandatory arguments, however, the exit() method can take an optional argument. It takes a string as an optional argument and then prints it out. See the example below:
Notice that we have passed a string as an argument to the exit method and it prints it out after executing. The same is with quit() and sys.exit() methods. They take a string as an optional argument and print it out. See the Python program below using each of them.
Now let us take another example using sys.exit() method along with a message. See the program below:
Notice that the message which was provided as an argument to the methods is printed.
Summary
Exiting a Python script refers to the process of termination of an active python process. In this tutorial, we learned about three different methods that are used to terminate the python script including exit() , quit() and sys.exit() method by taking various examples. At the same time, we also discussed how we can exit a function in pythons. Moreover, we also covered how we can exit a python script along with a message. All in all, we covered all the necessary methods and examples that are important to exit the python script.
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How to stop/terminate a python script from running?
I wrote a program in IDLE to tokenize text files and it starts to tokeniza 349 text files! How can I stop it? How can I stop a running Python program?
19 Answers 19
You can also do it if you use the exit() function in your code. More ideally, you can do sys.exit() . sys.exit() which might terminate Python even if you are running things in parallel through the multiprocessing package.
Note: In order to use the sys.exit() , you must import it: import sys
To stop your program, just press Control + C .
If your program is running at an interactive console, pressing CTRL + C will raise a KeyboardInterrupt exception on the main thread.
If your Python program doesn’t catch it, the KeyboardInterrupt will cause Python to exit. However, an except KeyboardInterrupt: block, or something like a bare except: , will prevent this mechanism from actually stopping the script from running.
Sometimes if KeyboardInterrupt is not working you can send a SIGBREAK signal instead; on Windows, CTRL + Pause/Break may be handled by the interpreter without generating a catchable KeyboardInterrupt exception.
However, these mechanisms mainly only work if the Python interpreter is running and responding to operating system events. If the Python interpreter is not responding for some reason, the most effective way is to terminate the entire operating system process that is running the interpreter. The mechanism for this varies by operating system.
In a Unix-style shell environment, you can press CTRL + Z to suspend whatever process is currently controlling the console. Once you get the shell prompt back, you can use jobs to list suspended jobs, and you can kill the first suspended job with kill %1 . (If you want to start it running again, you can continue the job in the foreground by using fg %1 ; read your shell’s manual on job control for more information.)
Alternatively, in a Unix or Unix-like environment, you can find the Python process’s PID (process identifier) and kill it by PID. Use something like ps aux | grep python to find which Python processes are running, and then use kill <pid> to send a SIGTERM signal.
The kill command on Unix sends SIGTERM by default, and a Python program can install a signal handler for SIGTERM using the signal module. In theory, any signal handler for SIGTERM should shut down the process gracefully. But sometimes if the process is stuck (for example, blocked in an uninterruptable IO sleep state), a SIGTERM signal has no effect because the process can’t even wake up to handle it.
To forcibly kill a process that isn’t responding to signals, you need to send the SIGKILL signal, sometimes referred to as kill -9 because 9 is the numeric value of the SIGKILL constant. From the command line, you can use kill -KILL <pid> (or kill -9 <pid> for short) to send a SIGKILL and stop the process running immediately.
How to manually stop a Python script that runs continuously on linux
I have a Python script that is running and continuously dumping errors into a log file.
I want to edit the script and run it again, but don’t know how to stop the script.
I’m currently logged on Linux through PuTTy and am doing all the coding there. So, is there a command to stop the python script in linux?
7 Answers 7
You will have to find the process id (pid). one command to do this would be
to limit results to python processes you can grep the result
which will give results like :
the second column is the pid. then use the kill command as such :
Try this simple line, It will terminate all script.py :
Find the process id (PID) of the script and issue a kill -9 PID to kill the process unless it’s running as your forground process at the terminal in which case you can Contrl-C to kill it.
Find the PID with this command:
It lists all the python processes, pick out the right one and note its PID. Then
will kill the process. You may get a message about having terminated a process at this stage.
Alternatively, you can use the top command to find the python process. Simply enter k (for kill) and the top program will prompt you for the PID of the process to kill. Sometimes it’s difficult to see all processes you are interested in with top since they may scroll off the screen, I think the ps approach is easier/better.
If the program is the current process in your shell, typing Ctrl-C will stop the Python program.
In a perfect world, you’d read the documentation for the script and see which signal(s) should be used to tell it to end. In real life, you probably want to send it the TERM signal, first, maybe using a KILL signal if it ignores the TERM. So, what you do is find the Process ID, using the ps command (as someone already described). Then, you can run kill -TERM <pid> . Some programs will clean up things, like files they might have open, when they get a signal like that, so it’s nicer to start with something like that. If that fails, then there’s not much left to do except the big hammer: kill -KILL <pid> . (you can use the numeric values, e.g. -KILL = -9, and they’ll probably never change, but in a theoretical sense it might be safer to use the names)
If you know the name of the script you could reduce all the work to a single command: