| 1 | import random |
| 2 | import string |
| 3 | |
| 1 | 4 | class Robot: |
| 5 | # Class variable to hold the set of used names |
| 6 | _used_names = set() |
| 7 | |
| 8 | # Class variable to hold the pool of available names |
| 9 | _name_pool = None |
| 10 | |
| 2 | 11 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 12 | self._name = None |
| 13 | self._initialize_name_pool() |
| 14 | self._assign_name() |
| 15 | |
| 5 | 16 | @property |
| 6 | 17 | def name(self) -> str: |
| 7 | | pass |
| 8 | | |
| 18 | return self._name |
| 19 | |
| 9 | 20 | def reset(self) -> None: |
| 10 | | pass |
| 21 | # Edge Case: Resetting a robot releases its name back to the pool |
| 22 | if self._name: |
| 23 | Robot._used_names.discard(self._name) |
| 24 | self._assign_name() |
| 25 | |
| 26 | @classmethod |
| 27 | def _initialize_name_pool(cls): |
| 28 | # Edge Case: Initialize the name pool only once |
| 29 | if cls._name_pool is None: |
| 30 | cls._name_pool = set() |
| 31 | letters = string.ascii_uppercase |
| 32 | digits = string.digits |
| 33 | for first_letter in letters: |
| 34 | for second_letter in letters: |
| 35 | for digit1 in digits: |
| 36 | for digit2 in digits: |
| 37 | for digit3 in digits: |
| 38 | name = f"{first_letter}{second_letter}{digit1}{digit2}{digit3}" |
| 39 | cls._name_pool.add(name) |
| 40 | |
| 41 | def _assign_name(self): |
| 42 | # Edge Case: Handle the case when all possible names are used |
| 43 | if len(Robot._used_names) >= len(Robot._name_pool): |
| 44 | raise RuntimeError("No more unique names available") |
| 45 | |
| 46 | # Get available names by subtracting used names from the pool |
| 47 | available_names = Robot._name_pool - Robot._used_names |
| 48 | |
| 49 | # Edge Case: Ensure there's at least one name available |
| 50 | if not available_names: |
| 51 | raise RuntimeError("No more unique names available") |
| 52 | |
| 53 | # Randomly select a name from available names |
| 54 | selected_name = random.choice(list(available_names)) |
| 55 | |
| 56 | # Add to used names and assign to this robot |
| 57 | Robot._used_names.add(selected_name) |
| 58 | self._name = selected_name |
| 59 | |
| 60 | # Handled Edge Cases: Resetting a robot releases its name back to the pool, Initialize the name pool only once, Handle the case when all possible names are used, Ensure there's at least one name available |