Create and run Python scripts on Raspberry Pi So, only use the shell for quick tests, and when you want to create real programs, create your own Python scripts instead. Note that when you exit the shell, all variable states and functions you’ve written inside the shell will be lost. To close the shell, you’ll have to execute the command “exit()” – with the parenthesis. Python will catch the signal sent by CTRL+C and will throw a KeyboardInterrupt exception, which you can also catch in your code if you want to.īut the shell won’t be closed. You can power on/off a LED directly from the Raspberry Pi terminal. to test small hardware components with the “RPi.GPIO” module.if a module is correctly installed: running import module will give you an error if the module can’t be found.Using the Python shell in the terminal is a great way to quickly test small features, for example: > print("Hello")Īs you can see, we can even create variables and use them later. Now, all the commands you’ll write will be interpreted as Python commands. This means that you’re in a Python shell, inside your “terminal shell”. This is what you should get at the end : “>”. Type "help", "copyright", "credits" or "license" for more information. Open a terminal, and run “python3” without any argument. If you’ve used Thonny IDE before, you could use the shell panel to write + execute code directly, line by line. Run Python code directly on the terminalīefore we even begin to write and execute complete files, you can just run any Python command you want directly on the terminal – in what we call a “Python shell”. If you already have Python 3 by default, you can choose to use “python” instead. Note: for the following of this tutorial I’ll still use the “python3” command. To do that simply run this command: echo "alias python=python3" > ~/.bashrc. This will make sure that when you type “python”, “python3” will be executed instead. If you still have Python 2 and just want to run Python 3 by default and not pay attention to the version anymore, you can add an alias in your bashrc. You can skip the following and jump to the next part of the tutorial.īut if you see something starting with “Python 2.x”, you’ll have to manually type “python3” to be able to use Python 3. Whether you type “python” or “python3”, you’ll use the correct version. If you see something starting with “Python 3.x”, then everything is fine. You are learning how to use Raspberry Pi to build your own projects?Ĭheck out Raspberry Pi For Beginners and learn step by step. If you have Python 2 and Python 3 installed on environment, then for the following you’ll want to make sure you only run scripts using Python 3, which is the newer and recommended version to use. However, this doesn’t mean that Python 2 has disappeared, or that it can’t work! In many systems Python 2 is still present, and the first thing you want to check is if it’s still there.
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