| 1 | import random |
| 2 | import string |
| 3 | |
| 1 | 4 | class Robot: |
| 5 | """A class representing a robot with a randomly generated name.""" |
| 6 | |
| 7 | # Class variable to keep track of all used names |
| 8 | _used_names = set() |
| 9 | |
| 2 | 10 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 11 | """Initialize a robot with no name.""" |
| 12 | self._name = None |
| 13 | |
| 5 | 14 | @property |
| 6 | 15 | def name(self) -> str: |
| 7 | | pass |
| 8 | | |
| 16 | """Get the robot's name. Generate one if it doesn't exist. |
| 17 | |
| 18 | Returns: |
| 19 | str: The robot's name in format of two uppercase letters followed by three digits. |
| 20 | """ |
| 21 | # Edge Case: Robot has no name yet, generate a new one |
| 22 | if self._name is None: |
| 23 | self._generate_name() |
| 24 | return self._name |
| 25 | |
| 9 | 26 | def reset(self) -> None: |
| 10 | | pass |
| 27 | """Reset the robot to factory settings, wiping its name. |
| 28 | |
| 29 | This removes the current name from the used names set and sets the robot's name to None. |
| 30 | """ |
| 31 | # Edge Case: Robot has a name that needs to be removed from the used names set |
| 32 | if self._name is not None: |
| 33 | Robot._used_names.remove(self._name) |
| 34 | self._name = None |
| 35 | |
| 36 | def _generate_name(self) -> None: |
| 37 | """Generate a unique random name for the robot. |
| 38 | |
| 39 | The name format is two uppercase letters followed by three digits. |
| 40 | Ensures the generated name is unique across all robots. |
| 41 | """ |
| 42 | # Edge Case: Handle potential name collisions by retrying until a unique name is found |
| 43 | while True: |
| 44 | # Generate two random uppercase letters |
| 45 | letters = ''.join(random.choices(string.ascii_uppercase, k=2)) |
| 46 | # Generate three random digits |
| 47 | digits = ''.join(random.choices(string.digits, k=3)) |
| 48 | # Combine to form the name |
| 49 | new_name = letters + digits |
| 50 | |
| 51 | # Check if this name is already used |
| 52 | if new_name not in Robot._used_names: |
| 53 | # Add to used names and assign to robot |
| 54 | Robot._used_names.add(new_name) |
| 55 | self._name = new_name |
| 56 | break |
| 57 | |
| 58 | # Handled Edge Cases: Robot has no name yet, Robot has a name that needs to be removed from the used names set, Handle potential name collisions by retrying until a unique name is found |