Python使用sort()方法对数组进行排序的操作指南

list.sort(key=None, reverse=False)

numbers = [4, 2, 9, 1, 5, 6]
numbers.sort()
print(numbers)  # 输出: [1, 2, 4, 5, 6, 9]

fruits = ["banana", "apple", "cherry", "orange"]
fruits.sort()
print(fruits)  # 输出: ['apple', 'banana', 'cherry', 'orange']

words = ["banana", "apple", "cherry", "orange"]
words.sort(key=len)
print(words)  # 输出: ['apple', 'orange', 'banana', 'cherry']

numbers = [4, 2, 9, 1, 5, 6]
numbers.sort(reverse=True)
print(numbers)  # 输出: [9, 6, 5, 4, 2, 1]

# 商品类，包含商品名称、价格、销量和评价
class Product:
    def __init__(self, name, price, sales, rating):
        self.name = name
        self.price = price
        self.sales = sales
        self.rating = rating

    def __repr__(self):
        return f"{self.name} - {self.price} - {self.sales} - {self.rating}"

# 商品列表
products = [
    Product("Product A", 30, 100, 4.5),
    Product("Product B", 20, 150, 4.7),
    Product("Product C", 50, 80, 4.3),
    Product("Product D", 40, 200, 4.8),
]

# 根据价格排序
def sort_by_price(products):
    products.sort(key=lambda product: product.price)
    return products

# 根据销量排序
def sort_by_sales(products):
    products.sort(key=lambda product: product.sales, reverse=True)
    return products

# 根据评价排序
def sort_by_rating(products):
    products.sort(key=lambda product: product.rating, reverse=True)
    return products

# 测试排序
print("按价格排序:")
print(sort_by_price(products))

print("\n按销量排序:")
print(sort_by_sales(products))

print("\n按评价排序:")
print(sort_by_rating(products))

按价格排序:
[Product B - 20 - 150 - 4.7, Product A - 30 - 100 - 4.5, Product D - 40 - 200 - 4.8, Product C - 50 - 80 - 4.3]

按销量排序:
[Product D - 40 - 200 - 4.8, Product B - 20 - 150 - 4.7, Product A - 30 - 100 - 4.5, Product C - 50 - 80 - 4.3]

按评价排序:
[Product D - 40 - 200 - 4.8, Product B - 20 - 150 - 4.7, Product A - 30 - 100 - 4.5, Product C - 50 - 80 - 4.3]