| 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 |
| 9 | followed by three digits (e.g., RX837 or BC811). Each robot has a unique name. |
| 10 | |
| 11 | Attributes: |
| 12 | _name (str): The robot's current name. Generated on first access. |
| 13 | """ |
| 14 | |
| 15 | # Class variable to hold all possible names |
| 16 | _name_pool = None |
| 17 | |
| 2 | 18 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 19 | """ |
| 20 | Initialize a new Robot instance. |
| 21 | |
| 22 | The robot starts without a name. The name will be generated when first accessed. |
| 23 | """ |
| 24 | self._name = None |
| 25 | |
| 5 | 26 | @property |
| 6 | 27 | def name(self) -> str: |
| 7 | | pass |
| 8 | | |
| 28 | """ |
| 29 | Get the robot's name. |
| 30 | |
| 31 | If the robot doesn't have a name yet, generate one from the name pool. |
| 32 | |
| 33 | Returns: |
| 34 | str: The robot's name in format of two uppercase letters followed by three digits. |
| 35 | |
| 36 | Raises: |
| 37 | RuntimeError: If all possible names have been exhausted. |
| 38 | """ |
| 39 | # Edge Case: Name pool exhausted - All possible names have been used |
| 40 | if Robot._name_pool is None: |
| 41 | Robot._generate_name_pool() |
| 42 | |
| 43 | if self._name is None: |
| 44 | # Edge Case: No names left in pool |
| 45 | if not Robot._name_pool: |
| 46 | raise RuntimeError("No more names available") |
| 47 | |
| 48 | self._name = Robot._name_pool.pop() |
| 49 | |
| 50 | return self._name |
| 51 | |
| 9 | 52 | def reset(self) -> None: |
| 10 | | pass |
| 53 | """ |
| 54 | Reset the robot to factory settings. |
| 55 | |
| 56 | This wipes the robot's current name. The next time the name is accessed, |
| 57 | a new random name will be generated. |
| 58 | """ |
| 59 | # Edge Case: Resetting a robot that never had a name assigned |
| 60 | if self._name is not None and Robot._name_pool is not None: |
| 61 | Robot._name_pool.add(self._name) |
| 62 | self._name = None |
| 63 | |
| 64 | @classmethod |
| 65 | def _generate_name_pool(cls): |
| 66 | """ |
| 67 | Generate all possible valid robot names and store them in a set. |
| 68 | |
| 69 | This method creates all combinations of two uppercase letters followed by |
| 70 | three digits and stores them in a class variable for reuse. |
| 71 | """ |
| 72 | # Edge Case: Name pool already exists - Prevent regenerating |
| 73 | if cls._name_pool is not None: |
| 74 | return |
| 75 | |
| 76 | cls._name_pool = set() |
| 77 | for first_letter in string.ascii_uppercase: |
| 78 | for second_letter in string.ascii_uppercase: |
| 79 | for number in range(1000): |
| 80 | name = f"{first_letter}{second_letter}{number:03d}" |
| 81 | cls._name_pool.add(name) |
| 82 | |
| 83 | # Handled Edge Cases: Name pool exhausted, No names left in pool, Resetting a robot that never had a name assigned, Name pool already exists |
| 84 | |
| 85 | # Handled Edge Cases: Name pool exhausted, No names left in pool, Resetting a robot that never had a name assigned, Name pool already exists |