What is `sys.argv`? How do you pass and parse command-line arguments in scripts?

sys.argv is a list containing the command-line arguments passed to the active Python script.

• sys.argv[0]: The name of the script itself.
• sys.argv[1]: The first argument passed after the script name.

# Save as test.py
import sys

print(f"Script Name: {sys.argv[0]}")
if len(sys.argv) > 1:
    print(f"First Arg: {sys.argv[1]}")

Running python3 test.py prod will output:

Script Name: test.py
First Arg: prod