| 1 | import random |
| 2 | import string |
| 3 | |
| 1 | 4 | class Robot: |
| 2 | | def __init__(self): |
| 3 | | pass |
| 5 | """A class representing a robot with a randomly generated name.""" |
| 6 | _used_names = set() |
| 4 | 7 | |
| 8 | def __init__(self): |
| 9 | """Initialize a new robot with no name.""" |
| 10 | self._name = None |
| 11 | |
| 5 | 12 | @property |
| 6 | 13 | def name(self) -> str: |
| 7 | | pass |
| 8 | | |
| 14 | """Get the robot's name, generating a new one if it doesn't exist. |
| 15 | |
| 16 | Returns: |
| 17 | str: The robot's name in format AA000. |
| 18 | """ |
| 19 | # Edge Case: Robot has no name yet, generate a new one |
| 20 | if self._name is None: |
| 21 | self._generate_name() |
| 22 | return self._name |
| 23 | |
| 9 | 24 | def reset(self) -> None: |
| 10 | | pass |
| 25 | """Reset the robot to factory settings, wiping its name. |
| 26 | |
| 27 | The old name is released and can be used by another robot. |
| 28 | """ |
| 29 | # Edge Case: Robot has no name, nothing to reset |
| 30 | if self._name is not None: |
| 31 | Robot._used_names.discard(self._name) |
| 32 | self._name = None |
| 33 | |
| 34 | def _generate_name(self) -> None: |
| 35 | """Generate a unique random name for the robot. |
| 36 | |
| 37 | The name format is two uppercase letters followed by three digits. |
| 38 | """ |
| 39 | # Edge Case: Handle name collision by retrying until unique name is found |
| 40 | while True: |
| 41 | letters = ''.join(random.choices(string.ascii_uppercase, k=2)) |
| 42 | digits = ''.join(random.choices(string.digits, k=3)) |
| 43 | new_name = letters + digits |
| 44 | |
| 45 | # Edge Case: Check if name is already used |
| 46 | if new_name not in Robot._used_names: |
| 47 | Robot._used_names.add(new_name) |
| 48 | self._name = new_name |
| 49 | break |
| 50 | |
| 51 | # Handled Edge Cases: Robot has no name yet, generate a new one; Handle name collision by retrying until unique name is found; Check if name is already used; Robot has no name, nothing to reset |