Monadic Error Handling in Python is Awesome

A practical walkthrough of implementing monadic error handling in Python, inspired by Rust's Result type. The approach represents failure as data rather than exceptions, using a Protocol and two dataclasses (Ok and Err) to create a Result type. Key operations covered include map (transform success values), bind (chain failable operations), and unwrap_or (get value or default). The tutorial builds up from simple examples to a railway-oriented config parsing pipeline, demonstrating how errors propagate through chained steps without try/except blocks at every stage.