Python Exit Program – Making You Exit the Program Okay: A blog around exit codes in python.
You’re writing a script and want to make sure it exits cleanly with the correct exit code.
Natively, python does not have great support for this but there are a number of libraries out there that can help you.
I’ve found the best library to be sh . It works on all platforms, has a stable API and is really easy to use.
To install the library, just run pip install sh .
Once installed, you can just import the library, set your status and then call exit() like so:
import sh
I have been writing a few scripts in python, and have just started to get into the code style of them. I thought it would be a good idea to cover a few ways you can exit the program with different exit codes, so you know whats going on.
Exit Code 0
So with our first exit code, this will simply exit the program, with no errors.
When it comes to exiting Python, there are different ways you can do it. So let’s look at how to exit Python and the various ways you can make this happen.
When it comes to exiting Python, there are different ways you can do it. So let’s look at how to exit Python and the various ways you can make this happen.
If you’re working in a simple script and don’t have anything else happening with your program, then sys.exit() is the way to go for exiting your program.
How to use sys.exit()?
First let’s import sys:
import sys
Now we can use sys.exit():
sys.exit(0)
What does the 0 mean? It’s an exit code, and you can use any number between 0 and 255. This is useful for running a program from a command line as you can check for errors and respond accordingly if there are any errors in the output from your Python program (as in the example below). An exit code of 0 means that everything is okay with your code (and 1 or higher means there was a problem).
So you want to exit a Python Program? Well, this article will show you several methods on how you can do that. All of them include the word ‘exit’ somehow or another.
First off let’s take a look at sys.exit()! This function is used to exit the program and return a value. It kills the current program and returns an exit code. Here is an example:
import sys
sys.exit()
In this tutorial, you will learn how to exit from a program using sys.exit() function in Python. The sys.exit() function allows the developer to exit from Python at any point in the program execution; this approach is useful when we want to terminate the program and perform some cleanup activities (like closing open connections/files).
The sys.exit() Function
The sys module contains a number of functions that enable us to exit or abort the execution of a program abruptly, without any cleanup or cleanup code being executed. These functions are:
sys.exit() – Using this function, we can abort the execution of the current program and exit immediately to the command prompt (without executing any remaining code) and it also accepts an argument which is passed back as an error code when exiting.
os._exit() – This function is similar to os.exit(), but it doesn’t call any cleanup handlers or flush stdio buffers and it accepts only one argument which determines the return code; this approach is useful when we need to abort execution if an exception occurs anywhere in our application (as shown below).
quit() – This built-in function is used to quit from interactive mode of Python and it works with no arguments, but it can also be
As you may already know, this is a user input function that stops the program until the user inputs something and hits enter. So that means we can add an if statement in there to check whether the user typed “exit” or not.
if user_input == “exit”:
sys.exit()
This code will cause the program to exit if the user types “exit”. You should put this code after all of your other input functions on your script. If you put it before, then it wont work anymore because the program will exit before anything else can be done.
Next, lets talk about how to use exit codes correctly. First of all, what are exit codes? Exit codes are numbers that give info about why your program has exited when it has exited. They are used by convention and shouldn’t be relied upon for full functionality but more for information on a crash or a bug in your code. Here’s an example:
sys.exit(1)
This line of code is telling python to exit with an exit code of 1, which by convention is defined as “Error during execution”.
In python, there are two ways to exit a program:
1. sys.exit()
2. exit() function
The first one is a library function and the second is a built-in function. The sys.exit() always raises the SystemExit exception, but we can also raise it by ourselves. The exit() function takes an optional argument, typically an integer, that gives an exit status. Zero is considered a “successful termination” and other values (1-255) indicates some kind of error.
When we start a program in python, the interpreter runs it line by line. But as soon as it encounters the sys.exit() statement or the exit() function, it stops the execution of the program immediately and quits from the program. The following example demonstrates how to use both of them: