Module
An exercise to help build the right mental model for Python data.
# Output of this Python program? a = [[1], [2]] b = a b[0].append(11) b = b + [[3]] b[1].append(22) b[2].append(33) print(a) # --- possible answers --- # A) [[1], [2]] # B) [[1, 11], [2]] # C) [[1, 11], [2, 22]] # D) [[1, 11], [2, 22], [3, 33]]
The “Solution” link visualizes execution and reveals what’s actually happening using .
