Chapter 10

10.1 Buggy cat naps

A way to approach this:

1. Run the code and observe the output: hmmm, total is 8.5 instead of expected 10.5.
2. Use print statements to see what values are being added or add a breakpoint in the while loop to inspect counter and total values:
   • Print the counter value
   • Print the value being added each iteration
3. Notice that the first nap (2 hours) is never added.
4. Identify the bug: while loop starts at counter=1, skipping index 0.

Fix in the while loop OR use a for loop to eliminate indexing issues entirely (even cleaner solution).

def nap_time(hours_list):
    total = 0
    # BREAKPOINT at the original while loop: Step through to see which values get added
    # Why: This reveals that index 0 is skipped (counter starts at 1)
    for nap in hours_list:
        total += nap
    return total
cat_naps = [2, 3, 1.5, 4]
print("Total nap time:", nap_time(cat_naps))
# Expected...