Block 138: Building a Reusable Automation Script

Concepts

• argparse for command-line arguments
• if __name__ == '__main__' guard
• Modular function structure
• requirements.txt and README documentation

Code Examples

See exercise below.

Exercise

Build a script that: scans a folder for CSVs, merges them into one, cleans nulls, exports merged CSV. Accept folder and output paths as CLI arguments. Add logging, error handling, and test 3 edge cases.

Homework

Run your script from the command line with --help and verify the documentation is clear. Friday