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How to run a Python script in Linux?

Posted on December 20, 2021August 10, 2023 By Pythoneo

New to Linux or Python? Having Python script to run and feeling lost? See how to run a Python script in Linux.

There are two ways on running Python scripts in Linux.

Method 1. Python3 command

Using your terminal you can run a script by typing python3 YourScript.py command. That’s it. Your script should run.

Method 2. Using a dot slash

The alternative is to run ./YourScript.py It will run Python script as well.

There are a few things you need to remember:

1. Your script needs to start with

#!/usr/bin/env python3

This will allow to run the script under Linux. If this is missing just add it in the first line of the file. Don’t worry. This will not change the logic of the script.

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2. Your file needs to be executable. You need to have permission to execute the script to be able to run the Python programm. To change the permission you need to allow script to be executable for your user by

chmod +x YourScript.py

3. Path of your Python needs to be assigned properly. This is how to set it in Linux:

export PATH="$PATH:/usr/local/bin/python"

FAQ

  • Why do I need to add `#!/usr/bin/env python3` to my script?

    The `#!/usr/bin/env python3` line is a shebang, which tells the operating system which interpreter to use to run the script. This is necessary because Linux can be configured to use different Python interpreters.

  • Why do I need to make my script executable?

    By default, Linux files are not executable. This means that you cannot run them by typing their name in the terminal. To make your script executable, you need to use the `chmod +x` command.

  • What is the path of my Python?

    The path of your Python is the directory where the Python interpreter is located. You can find the path of your Python by typing the following command in the terminal:

    which python3
    
  • What if I get an error when I try to run my script?

    If you get an error when you try to run your script, it could be for a number of reasons. Here are some common reasons and how to fix them:

    * The script is not executable. Make sure to use the `chmod +x` command to make the script executable.
    * The path of your Python is not set properly. Use the `export PATH=”$PATH:/usr/local/bin/python”` command to set the path of your Python.
    * The script is not in the current directory. Make sure that the script is in the current directory or that you specify the full path to the script when you run it.
    * There is an error in the script. Try debugging the script to find the error.

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Python Tags:linux, path, permission, script

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