(numbers)
| 143 | |
| 144 | print("Example 12") |
| 145 | def normalize_defensive(numbers): |
| 146 | if iter(numbers) is numbers: # An iterator -- bad! |
| 147 | raise TypeError("Must supply a container") |
| 148 | total = sum(numbers) |
| 149 | result = [] |
| 150 | for value in numbers: |
| 151 | percent = 100 * value / total |
| 152 | result.append(percent) |
| 153 | return result |
| 154 | |
| 155 | |
| 156 | visits = [15, 35, 80] |