How to Pass Arguments to a Shell Script for Python Execution

Описание: Learn how to easily pass arguments from your shell script to a Python script with clear steps and examples.
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This video is based on the question https://stackoverflow.com/q/65674823/ asked by the user 'Avi G' ( https://stackoverflow.com/u/14503110/ ) and on the answer https://stackoverflow.com/a/65674912/ provided by the user 'Matt Miguel' ( https://stackoverflow.com/u/14941819/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Pass Arguments to a Shell Script for Python Execution

When working with shell scripts that interact with other scripts or programs, it can sometimes be tricky to pass arguments correctly. If you find yourself needing to send parameters to a script written in Python from a shell script, fret not! In this post, we'll address how to seamlessly pass arguments from your shell script to your Python script with ease.

Understanding the Problem

Let’s say you have a shell script named script.sh that executes a Python script located at /folder/script.py. Your Python script needs to accept command-line arguments. For instance:

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You attempt to execute your shell script with the command:

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However, the expected behavior is not occurring. The problem? Your shell script is not designed to forward the arguments to the Python script it calls. Let’s dive into how to solve this issue.

The Solution: Modifying Your Shell Script

Passing arguments from your shell script to your Python script is straightforward once you know what to add to your shell script. Here's the modified version of your script.sh:

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Explanation of the Code

The # !/bin/bash at the top indicates that this script should be run in the Bash shell.

The line python /folder/script.py "$@ " is key to resolving your issue. Here’s how it works:

$@ : This variable represents all the arguments passed to your shell script. By enclosing it in quotes, you ensure that even if arguments contain spaces, they are handled correctly.

How It Works in Practice

When you run the command:

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The shell script captures the -d 20210107 arguments and forwards them to the Python script.

The Python script receives the arguments as if you had run it directly in the command line, enabling it to function as intended.

Key Points to Remember

Always use "$@ " to pass all the arguments without losing any important context, especially if arguments might contain spaces.

Ensure that your shell script is executable. You can do this with the command:

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Conclusion

Passing arguments from a shell script to a Python script can be a breeze with the right modifications. With the simple adjustment we made, you'll be able to run your commands with ease and pass any required parameters effortlessly. Now, your workflow can become more efficient, allowing you to focus on what matters most—getting things done!

Now you're ready to adapt this solution in your own projects and scripts. Happy coding!