python argparse optional

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Argparse is a standard library module in Python that makes it easy to write user-friendly command-line interfaces. In this tutorial, we'll focus on how to use argparse to handle optional arguments in your Python scripts.
Argparse allows you to define and parse command-line arguments. It supports both positional and optional arguments, making it a versatile tool for creating command-line interfaces.
Argparse is part of the Python standard library, so you don't need to install anything. You can import it directly in your script.
Let's start by creating a simple Python script that takes optional arguments.
In this example, we define an optional argument -v or --verbose. The action='store_true' means that if the argument is present, args.verbose will be set to True. The help parameter provides a brief description of the argument.
Save the script as script.py and run it from the command line.
The script will execute without the verbose mode.
The script will execute with the verbose mode enabled.
You can also add optional arguments that require a value. Let's modify the script to include an optional argument for setting a custom message.
In this example, the -m or --message argument takes a string value. The type=str specifies the expected type of the argument.
Save the updated script as script_with_value.py and run it from the command line.
The script will execute without a custom message.
The script will execute with the custom message.
Argparse is a powerful module for handling command-line arguments in Python. This tutorial covered the basics of adding optional arguments to your scripts. Experiment with different options and tailor argparse to meet the requirements of your command-line interfaces.
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