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| class Book: | |
| title = None | |
| author = None | |
| year = None | |
| def __init__(self, author, title, year): | |
| self.author = author | |
| self.title = title | |
| self.year = year | |
| # Equality check implementation | |
| def __eq__(self, other): | |
| return self.author == other.author and \ | |
| self.title == other.title and \ | |
| self.year == other.year | |
| # Hash implementation | |
| def __hash__(self): | |
| return hash(('author', self.author, | |
| 'title', self.title, | |
| 'year', self.year)) | |
| def __str__(self): | |
| return f"{self.title} by {self.author} in {self.year}" |
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