Error Handling: try / except — Python Exercise

Overview

Programs meet bad input. Catch exceptions so your code fails gracefully instead of crashing.

try / except blocks
Catching specific exceptions
else and finally

Short Course

Code that might fail goes in a try block. If an error is raised, Python jumps to the matching except block instead of crashing. Catch the specific exceptions you expect — a bare except: hides real bugs.

def parse_age(text):
    try:
        return int(text)
    except ValueError:        # int("abc") raises ValueError
        return None

parse_age("42")    # -> 42
parse_age("abc")   # -> None

Task

Write safe_divide(a, b) that returns a / b. If b is zero (ZeroDivisionError) or the values can't be divided (TypeError), return None instead.

Test Suites Pending

Stdout