Thonny run without saving2/18/2023 ![]() It has been debugged, and is well-structured and well-documented. To clarify, by this we mean the code that is ready to be sent to the client / end-user. So now let’s look at how we can stop our scripts from running in production code. For this reason, both of these options should only be used for development purposes and within the Python interpreter. ![]() Neither of these are deemed suitable for use in production code, i.e in a real-world situation, as we are not controlling how and if the site module is loaded. However, please note both quit() and exit() are only designed for use within the Python interpreter, where the site module has been loaded. In both instances, if we run the code above from our interpreter the program will automatically stop and exit/quit once x gets to 5. These two objects work in the same way, as follows, and as their names suggest can be used to stop our scripts: When you start Python the site module is automatically loaded, and this comes with the quit() and exit()objects by default. This will obviously require us to understand our code and pre-determine where any stops will be necessary. So we have seen how to use our keyboard to stop our scripts from running, now let’s look at how we can use our code to stop the scripts. We are simply returned to the command prompt. ![]() Not only does this stop the script, but as this is not the KeyboardInterrupt shortcut we don’t get the same message back from our interpreter. In this instance we can use Ctrl Pause/Break which is a much more powerful way of stopping our script. So now, when we run the above script through our windows command prompt, our ctrl c shortcut is ineffective and the numbers keep printing. The effect of except:, in this example, is to negate our KeyboardInterrupt shortcut – whether intentionally or not. For example, our script could explicitly stop this from working by specifically excluding KeyboardInterrupt i.e except KeyboardInterrupt or it can even be excluded with the normal except syntax. Whilst the above works well with our simple code example, there are times when this might not be the case. When we use this we get a response back from our Python interpreter telling us the program was stopped using this shortcut. One of the most common methods to stop a script is by using the following keyboard shortcut, which is known as KeyboardInterrupt : Ctrl C We have not put any conditions on it to stop. If we now run the above script through our Python interpreter it will just keep printing numbers sequentially indefinitely. To start with, let’s put together a little script that will give us the problem we are looking to solve, and call it test.py and save it in a working directory C:\Users\Rikesh: x = 1 The exact mechanism for a keyboard stop will really depend on your operating system, for the purposes of this article we are going to be using a Windows 10 machine so all syntax will relate to this environment. Let’s have a look at these two options in more detail. For option 1, we need to understand how to stop our code arbitrarily when the program is running, and we do this using our keyboard. ![]() Option 2 can be planned for by including a stop mechanism within our code, i.e.
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