Error Handling & Exceptions

In production systems, unexpected events will always happen: networks drop, disk permissions fail, and users input invalid data. Exception Handling prevents fatal crashes and keeps servers running.

The `try` / `except` / `finally` Block

try:

amount = float(user_input)

process_payment(amount)

except ValueError as err:

log_warning(f"Invalid numeric input: {err}")

finally:

cleanup_temporary_session()

Quick Summary

Catch specific exceptions (e.g. ValueError, FileNotFoundError) rather than bare except: blocks.
Next, we connect Python to the world via APIs & HTTP Requests.