| 1 | 1 | def parse_octal(digits): |
| 2 | pass | |
| 2 | # Edge Case: Empty string input | |
| 3 | if not digits: | |
| 4 | raise ValueError("Invalid octal input: empty string") | |
| 5 | ||
| 6 | # Edge Case: Invalid characters in octal string | |
| 7 | for char in digits: | |
| 8 | if char < '0' or char > '7': | |
| 9 | raise ValueError("Invalid octal input: contains non-octal digits") | |
| 10 | ||
| 11 | result = 0 | |
| 12 | power = 0 | |
| 13 | ||
| 14 | # Process digits from right to left | |
| 15 | for i in range(len(digits) - 1, -1, -1): | |
| 16 | digit = int(digits[i]) | |
| 17 | result += digit * (8 ** power) | |
| 18 | power += 1 | |
| 19 | ||
| 20 | return result | |
| 21 | # Handled Edge Cases: empty string input, invalid characters in octal string |