python read from command line arguments

Published: 21 January 2024
on channel: CodeCraft

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Command line arguments provide a way to pass information to a Python script when it is executed. Python provides the sys module to access these command line arguments. In this tutorial, we will explore how to read command line arguments in Python and provide a simple code example.
The sys module is part of the Python Standard Library and provides access to some variables used or maintained by the Python interpreter, including command line arguments. Import the sys module at the beginning of your script.
Command line arguments are stored in the sys.argv list, where sys.argv[0] is the script name, and the subsequent elements are the arguments provided when the script is executed.
Save the above code in a file named script_name.py. To run the script with command line arguments, open a terminal or command prompt, navigate to the script's directory, and execute the following command:
Replace arg1, arg2, and arg3 with the actual values you want to pass as command line arguments.
If you run the script with the command python script_name.py arg1 arg2 arg3, the output should be:
Now you have successfully read and displayed command line arguments in your Python script.
This tutorial provides a basic understanding of reading command line arguments in Python. Depending on your script's complexity, you may need to implement more robust argument parsing using libraries like argparse for handling different types of arguments and providing user-friendly interfaces.
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