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Automation & scripting easy

How to validate argparse CLI commands in Python

Build a beginner-friendly command-line argument parser with argparse, including required and optional arguments, plus simple validation for age.

argparse cli validation
Python 
import argparse


def main():
    parser = argparse.ArgumentParser(description="Validate CLI arguments for beginners.")
    parser.add_argument("name", type=str, help="Your name.")
    parser.add_argument("--age", type=int, default=None, help="Your age (optional).")
    parser.add_argument("--verbose", action="store_t…
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