| 1 | import random |
| 2 | import string |
| 3 | |
| 1 | 4 | class Robot: |
| 5 | """ |
| 6 | A class representing a robot with a randomly assigned name. |
| 7 | |
| 8 | The robot's name is generated in the format of two uppercase letters followed by three digits. |
| 9 | Names are unique and randomly assigned from a pre-generated pool. |
| 10 | """ |
| 11 | |
| 12 | # Class-level name pool and index to ensure uniqueness across all robot instances |
| 13 | _name_pool = [] |
| 14 | _current_index = 0 |
| 15 | |
| 2 | 16 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 17 | """ |
| 18 | Initialize a new Robot instance. |
| 19 | |
| 20 | If this is the first robot being created, generate and shuffle the name pool. |
| 21 | Assign the first available name from the pool. |
| 22 | """ |
| 23 | # Edge Case: First robot initialization - generate and shuffle the name pool |
| 24 | if not Robot._name_pool: |
| 25 | self._generate_name_pool() |
| 26 | |
| 27 | # Edge Case: Exhausted name pool - raise an exception as no more names are available |
| 28 | if Robot._current_index >= len(Robot._name_pool): |
| 29 | raise Exception("No more names available") |
| 30 | |
| 31 | self._name = Robot._name_pool[Robot._current_index] |
| 32 | Robot._current_index += 1 |
| 33 | |
| 5 | 34 | @property |
| 6 | 35 | def name(self) -> str: |
| 7 | | pass |
| 8 | | |
| 36 | """ |
| 37 | Get the robot's current name. |
| 38 | |
| 39 | Returns: |
| 40 | str: The robot's name in format of two uppercase letters followed by three digits. |
| 41 | """ |
| 42 | return self._name |
| 43 | |
| 9 | 44 | def reset(self) -> None: |
| 10 | | pass |
| 45 | """ |
| 46 | Reset the robot to factory settings, wiping its name. |
| 47 | |
| 48 | The robot will receive a new unique name from the pool when accessed next. |
| 49 | """ |
| 50 | # Edge Case: Exhausted name pool during reset - raise an exception as no more names are available |
| 51 | if Robot._current_index >= len(Robot._name_pool): |
| 52 | raise Exception("No more names available") |
| 53 | |
| 54 | self._name = Robot._name_pool[Robot._current_index] |
| 55 | Robot._current_index += 1 |
| 56 | |
| 57 | @classmethod |
| 58 | def _generate_name_pool(cls): |
| 59 | """ |
| 60 | Generate all possible valid robot names and shuffle them randomly. |
| 61 | |
| 62 | This method is called once to create a pool of all possible names in the format |
| 63 | of two uppercase letters followed by three digits. |
| 64 | """ |
| 65 | # Edge Case: Name format requirements - generate names with exactly 2 letters and 3 digits |
| 66 | for letter1 in string.ascii_uppercase: |
| 67 | for letter2 in string.ascii_uppercase: |
| 68 | for digit1 in string.digits: |
| 69 | for digit2 in string.digits: |
| 70 | for digit3 in string.digits: |
| 71 | cls._name_pool.append(f"{letter1}{letter2}{digit1}{digit2}{digit3}") |
| 72 | |
| 73 | # Shuffle the name pool to ensure randomness |
| 74 | random.shuffle(cls._name_pool) |
| 75 | |
| 76 | # Handled Edge Cases: First robot initialization, exhausted name pool, name format requirements |
| 77 | |
| 78 | # Handled Edge Cases: First robot initialization, exhausted name pool during reset, name format requirements |