python argparse default value for optional argument

The argparse module in Python provides a powerful and convenient way to parse command-line arguments. In this tutorial, we'll explore how to set default values for optional arguments using argparse. Default values are useful when you want an argument to be optional, and if not provided, it takes on a predefined default value.
Let's start by creating a simple script that uses argparse to handle command-line arguments.
In this example, we've created a basic script with an argparse setup. The --optional_arg is an optional argument, and its type is set to int with a default value of 42. If the user does not provide a value for --optional_arg, it will default to 42.
Output:
You can see that the script runs with the default value for the --optional_arg argument.
You can also provide a custom value for the optional argument:
Output:
The script takes the provided value for --optional_arg instead of the default value.
In this tutorial, we covered how to use argparse in Python to define optional arguments with default values. This is a handy feature when you want to make certain arguments optional and provide a default value if the user does not specify one. The argparse module offers a flexible and user-friendly way to handle command-line arguments in your Python scripts.
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