在Python中搜索对象列表

在本文中，我们将讨论如何在Python中搜索对象列表。

可以通过遍历列表来搜索特定或一组对象。

语法：

class_name.object_name

在哪里，

• class_name 是类的名称
• object_name 是对象的名称

示例 1：

创建具有以下属性的 Car 类并执行搜索操作，返回价格低于100 万 (10,00,000/-) 的汽车。

属性：

• 弦乐公司
• 字符串模型名称
• 国际价格
• 座位容量

Python3

class Car():
   
    # constructor
    def __init__(self, company, modelName, price, seatingCapacity):
        self.company = company
        self.modelName = modelName
        self.price = price
        self.seatingCapacity = seatingCapacity
 
 
# list of car objects
carsList = [Car('Honda', 'Jazz', 900000, 5),
            Car('Suzuki', 'Alto', 450000, 4),
            Car('BMW', 'X5', 9000000, 5)]
 
# cars with price less than 10 Lakhs
economicalCars = [car for car in carsList if car.price <= 1000000]
 
# print those cars
for car in economicalCars:
    print(car.company+'--'+car.modelName)

输出

Honda--Jazz
Suzuki--Alto

示例 2

使用相同的汽车类别并搜索座位容量为 4 的汽车。

Python3

class Car():
   
    # constructor
    def __init__(self, company, modelName, price, seatingCapacity):
        self.company = company
        self.modelName = modelName
        self.price = price
        self.seatingCapacity = seatingCapacity
 
 
# list of car objects
carsList = [Car('Honda', 'Jazz', 900000, 5),
            Car('Suzuki', 'Alto', 450000, 4),
            Car('BMW', 'X5', 9000000, 5)]
 
# cars having seating capacity 4
smallCars = [car for car in carsList if car.seatingCapacity == 4]
 
# print those cars
for car in smallCars:
    print(car.company+'--'+car.modelName+'--'+str(car.seatingCapacity))

输出

Suzuki--Alto--4

示例 3：

使用上述相同的Car 类，搜索BMW公司的汽车并返回它们。

Python3

class Car():
   
    # constructor
    def __init__(self, company, modelName, price, seatingCapacity):
        self.company = company
        self.modelName = modelName
        self.price = price
        self.seatingCapacity = seatingCapacity
 
 
# list of car objects
carsList = [Car('Honda', 'Jazz', 900000, 5),
            Car('Suzuki', 'Alto', 450000, 4),
            Car('BMW', 'X5', 9000000, 5)]
 
# bmw cars
BMW_Cars = [car for car in carsList if car.company == 'BMW']
 
# print those cars
for car in BMW_Cars:
    print(car.company+'--'+car.modelName+'--' +
          str(car.price)+'--'+str(car.seatingCapacity))

输出

BMW--X5--9000000--5