python script arguments
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title: a beginner's guide to python script arguments
python scripts often need to accept input from users or external sources. one way to achieve this is by using command-line arguments. command-line arguments allow users to pass information to a script when it is executed. in this tutorial, we'll explore how to work with python script arguments, including both positional and optional arguments.
positional arguments are passed to a script in a specific order. the script expects the arguments to be provided in the same order as they are defined in the script.
optional arguments, also known as flags or options, are not required and usually start with a prefix, such as - or --. they provide additional information or modify the behavior of the script.
in python, the sys module provides access to some variables used or maintained by the python interpreter. sys.argv is a list in python that contains the command-line arguments passed to the script.
let's create a simple script that prints the command-line arguments:
save this script as script.py. to run it with some arguments, open a terminal and execute:
replace arg1, arg2, and arg3 with your desired arguments.
the argparse module provides a more powerful and flexible way to parse command-line arguments. it allows you to define both positional and optional arguments with various types and constraints.
let's create a script using argparse:
save this script as argparse_script.py. to run it, execute:
adjust the values as needed.
understanding how to work with python script arguments is crucial for building versatile and user-friendly scripts. whether using the basic sys.argv approach or the more advanced argparse module, python provides the tools to handle command-line arguments effectively. experiment with different argument types and options to create scripts that meet your specific requirements.
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