Solutions #1265
Solutions #1265
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Great job on your code so far! However, there's a small issue with the hook_load method in the DeliveryDrone class. It's critical to ensure that the drone doesn't carry more weight than it's supposed to. I believe you can fix this with a minor adjustment. Keep up the good work! 😊
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app/main.py
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| def hook_load(self, cargo: Cargo) -> None: | ||
| if self.current_load is None and cargo.weight <= self.max_load_weight: | ||
| self.current_load = cargo | ||
| print(f"Hooked load of weight {cargo.weight}" | ||
| f". Current load: {self.current_load.weight}") | ||
| elif (isinstance(self.current_load, Cargo) and self.current_load.weight | ||
| + cargo.weight <= self.max_load_weight): | ||
| self.current_load.weight += cargo.weight | ||
| print(f"Hooked load of weight {cargo.weight}" | ||
| f". Current load: {self.current_load.weight}") |
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The hook_load method seems to have some issues. In the case where there is no current load, it correctly checks that the weight of the cargo to be hooked is less than or equal to the maximum load weight. However, in the case where there is a current load, it only checks that the weight of the current load plus the weight of the cargo to be hooked is less than or equal to the maximum load weight. This could lead to a situation where the drone is carrying more weight than it is supposed to. It would be better to check that the weight of the cargo to be hooked is less than or equal to the maximum load weight minus the weight of the current load.
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Great job on the code, but there's still room for improvement. Remember to handle edge cases in your methods and avoid using mutable default arguments as they can lead to unexpected behavior. Also, consider using exceptions instead of print statements for error handling. Keep up the good work! 👍
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| class BaseRobot: | ||
| def __init__(self, name: str, weight: int, coords: list = None) -> None: | ||
| self.name = name | ||
| self.weight = weight | ||
| self.coords = coords if coords is not None else [0, 0] |
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The 'coords' attribute is a mutable default argument. It's a common Python pitfall. If a new instance of BaseRobot (or any class that inherits from it) is created without providing a 'coords' value, they will all share the same list. It's better to use a non-mutable default value like None and create a new list in the constructor.
| def hook_load(self, cargo: Cargo) -> None: | ||
| current_load_weight = \ | ||
| (self.current_load.weight) if self.current_load else 0 | ||
| available_capacity = self.max_load_weight - current_load_weight | ||
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| if cargo.weight <= available_capacity: | ||
| if self.current_load: | ||
| self.current_load.weight += cargo.weight | ||
| else: | ||
| self.current_load = cargo | ||
| print(f"Hooked load of weight {cargo.weight}" | ||
| f". Current load: {self.current_load.weight}") | ||
| else: | ||
| print("Cannot hook load. Exceeds max load weight.") |
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The hook_load method could be improved. Right now, if the drone already has a load, it increases the weight of the current load. It might be better to keep a list of loads, so that you can track individual cargo items. Also, using print statements for error handling is not a good practice. Consider raising exceptions instead.
| def unhook_load(self) -> None: | ||
| self.current_load = None | ||
| print("Load unhooked. Current load is now None.") |
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The unhook_load method sets the current load to None without any checks. What if there is no load to begin with? It would be better to first check if there is a load to unhook and handle the situation appropriately.
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Great job on writing the code! However, there are a few areas that need your attention for improvement. The unhook_load function should check if there's a load to unhook before setting self.current_load to None. In hook_load, consider raising an exception when the cargo weight exceeds capacity. Also, avoid using mutable default arguments to prevent unexpected behavior. Keep up the good work, and remember, every mistake is a learning opportunity! 😊
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| class BaseRobot: | ||
| def __init__(self, name: str, weight: int, coords: list = None) -> None: | ||
| self.name = name | ||
| self.weight = weight | ||
| self.coords = coords if coords is not None else [0, 0] |
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For the coords parameter, you are using a mutable default argument (a list) which can lead to unexpected behavior. It's a common Python pitfall. When the default mutable argument is modified, the modification is permanent, thus the default argument is not so default after the first modification. A better approach would be to make the default value None and then assign the default value in the body of the function if None is provided.
| def hook_load(self, cargo: Cargo) -> None: | ||
| current_load_weight = \ | ||
| (self.current_load.weight) if self.current_load else 0 | ||
| available_capacity = self.max_load_weight - current_load_weight | ||
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| if cargo.weight <= available_capacity: | ||
| if self.current_load: | ||
| self.current_load.weight += cargo.weight | ||
| else: | ||
| self.current_load = cargo | ||
| print(f"Hooked load of weight {cargo.weight}" | ||
| f". Current load: {self.current_load.weight}") | ||
| else: | ||
| print("Cannot hook load. Exceeds max load weight.") |
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The hook_load function could be improved. Currently, when the cargo weight exceeds the available capacity, the function simply prints a message and exits. It would be more robust to raise an exception in this case. This would allow the calling code to catch the exception and handle it appropriately, rather than having to check the console output to see if the function succeeded.
| def unhook_load(self) -> None: | ||
| self.current_load = None | ||
| print("Load unhooked. Current load is now None.") |
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The unhook_load function sets self.current_load to None without checking if there is a load to unhook. This could potentially lead to unexpected behavior. It would be safer to first check if self.current_load is not None, and only then set it to None and print a message. If self.current_load is already None, you could print a different message or raise an exception.
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