| 1 | import random |
| 2 | import string |
| 3 | |
| 1 | 4 | class Robot: |
| 5 | # Class variable to store all possible names |
| 6 | _name_pool = [] |
| 7 | _used_names = set() |
| 8 | |
| 2 | 9 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 10 | """Initialize a Robot with no name.""" |
| 11 | self._name = None |
| 12 | |
| 5 | 13 | @property |
| 6 | 14 | def name(self) -> str: |
| 7 | | pass |
| 8 | | |
| 15 | """Get the robot's name. Generate one if it doesn't exist.""" |
| 16 | # Edge Case: Robot has no name yet, generate a new one |
| 17 | if self._name is None: |
| 18 | self._generate_name() |
| 19 | return self._name |
| 20 | |
| 9 | 21 | def reset(self) -> None: |
| 10 | | pass |
| 22 | """Reset the robot to factory settings, wiping its name.""" |
| 23 | # Edge Case: Robot has a name that needs to be released back to the pool |
| 24 | if self._name is not None: |
| 25 | Robot._used_names.discard(self._name) |
| 26 | self._name = None |
| 27 | |
| 28 | def _generate_name(self) -> None: |
| 29 | """Generate a unique random name for the robot.""" |
| 30 | # Edge Case: All possible names have been used |
| 31 | if len(Robot._used_names) >= 26 * 26 * 1000: # All possible names (26*26*1000) |
| 32 | raise RuntimeError("No more unique names available") |
| 33 | |
| 34 | # Generate a new unique name |
| 35 | while True: |
| 36 | # Generate two random uppercase letters |
| 37 | letters = ''.join(random.choices(string.ascii_uppercase, k=2)) |
| 38 | # Generate three random digits |
| 39 | digits = ''.join(random.choices(string.digits, k=3)) |
| 40 | # Combine to form the name |
| 41 | new_name = letters + digits |
| 42 | |
| 43 | # Edge Case: Generated name is already in use, try again |
| 44 | if new_name not in Robot._used_names: |
| 45 | self._name = new_name |
| 46 | Robot._used_names.add(new_name) |
| 47 | break |
| 48 | |
| 49 | # Handled Edge Cases: Robot has no name yet, Robot has a name that needs to be released back to the pool, All possible names have been used, Generated name is already in use |