Solution#2779
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Review Summary
Your implementation correctly handles all functional requirements and tests pass. However, two explicit checklist items are violated that need to be addressed:
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[CHECKLIST ITEM #2] Missing
from __future__ import annotationsimport at the top ofapp/main.py— this is required to avoid potentialNameErrorwhen usingDistancein forward reference annotations. -
[CHECKLIST ITEM #1] Unnecessary
elsestatement in the__iadd__method — since the method returns for bothDistanceand(int, float)cases, the finalelse: return NotImplementedis redundant and should be removed.
Please fix both checklist violations and your implementation will be approved.
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Footnotes
| @@ -1,3 +1,74 @@ | |||
| from typing import Union | |||
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Checklist requirement: Add from __future__ import annotations import at the top of the file to avoid potential NameError: name 'Distance' is not defined when using Distance in annotations.
| self.km += other | ||
| else: |
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Checklist item #1 violation: Avoid unnecessary else statements. Since the method returns for both Distance and (int, float) cases, the final else is redundant. Consider restructuring to remove the else.
…emented in __iadd__
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Review Summary
Your solution is approved. All requirements are satisfied: the Distance class implements all specified magic methods (__init__, __str__, __repr__, __add__, __iadd__, __mul__, __truediv__, and comparison operators) with correct behavior and type annotations. The from __future__ import annotations import is properly placed at line 1, and the code follows the early return pattern without unnecessary else statements. Great work on implementing the bidirectional operations between Distance and numeric types while maintaining proper type safety.
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