timmy revidoval tento gist 9 months ago. Přejít na revizi
4 files changed, 44 insertions
dataclass_example.py(vytvořil soubor)
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| 1 | + | from dataclasses import dataclass | |
| 2 | + | ||
| 3 | + | @dataclass | |
| 4 | + | class User: | |
| 5 | + | name: str | |
| 6 | + | age: int | |
| 7 | + | email: str | |
| 8 | + | ||
| 9 | + | # 建立實例 | |
| 10 | + | user = User(name="Tim", age=30, email="tim@example.com") | |
| 11 | + | print(user) # User(name='Tim', age=30, email='tim@example.com') | |
dataclass_with_default.py(vytvořil soubor)
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| 1 | + | from dataclasses import dataclass, field | |
| 2 | + | ||
| 3 | + | @dataclass | |
| 4 | + | class Product: | |
| 5 | + | name: str | |
| 6 | + | price: float | |
| 7 | + | stock: int = field(default=10) # 預設庫存為 10 | |
| 8 | + | ||
| 9 | + | product = Product(name="Laptop", price=999.99) | |
| 10 | + | print(product) # Product(name='Laptop', price=999.99, stock=10) | |
employee_with_post_init.py(vytvořil soubor)
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| 1 | + | from dataclasses import dataclass, field | |
| 2 | + | ||
| 3 | + | @dataclass | |
| 4 | + | class Employee: | |
| 5 | + | name: str | |
| 6 | + | salary: float | |
| 7 | + | department: str = "General" | |
| 8 | + | ||
| 9 | + | def __post_init__(self): | |
| 10 | + | self.salary = round(self.salary, 2) # 四捨五入薪資 | |
| 11 | + | ||
| 12 | + | employee = Employee(name="Alice", salary=1234.5678) | |
| 13 | + | print(employee) # Employee(name='Alice', salary=1234.57, department='General') | |
shopping_cart_example.py(vytvořil soubor)
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| 1 | + | from dataclasses import dataclass, field | |
| 2 | + | from typing import List | |
| 3 | + | ||
| 4 | + | @dataclass | |
| 5 | + | class ShoppingCart: | |
| 6 | + | items: List[str] = field(default_factory=list) # 預設為空列表 | |
| 7 | + | ||
| 8 | + | cart = ShoppingCart() | |
| 9 | + | cart.items.append("Apple") | |
| 10 | + | print(cart) # ShoppingCart(items=['Apple']) | |