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Automation & scripting

CLI tools, scheduled jobs, filesystem tasks, and glue scripts that save time.

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Automation & scripting easy

How to Build an argparse Command-Line Tool in Python

Create a simple file-info CLI with argparse that counts lines and prints file size, with optional verbose and output flags.

argparse cli command-line
Python 
import argparse
import os
from pathlib import Path


def process_file(filepath, verbose=False):
    """Read a file and report its size and line count."""
    path = Path(filepath)
    if not path.exists():
        raise FileNotFoundError(f"File not found: {filepath}")

    content = path.read_text()
    lines = conten…
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