交通工具有多种多样，比如：汽车、火车、飞机等，一般的交通工具类的属性有：厂商，发动机型号，制作型号，时间；方法有：运行（输出速度），停止。 （1）请使用抽象方法实现交通工具类和方法：实现汽车、火车、飞机类，继承于交通工具类，实现他们不同的运行方法。 （2）Tom在出门去，不知道会乘坐什么交通工具，利用用户的输入值进行随机派遣（mod 3 ,根据余数随机决定交通工具），要求程序利用上转型对象完成编程。

（1）交通工具类和方法的抽象实现：

from abc import ABC, abstractmethod

class Transportation(ABC):
    
    @abstractmethod
    def run(self):
        pass
    
    @abstractmethod
    def stop(self):
        pass

class Car(Transportation):
    
    def __init__(self, brand, engine_model, production_model, year):
        self.brand = brand
        self.engine_model = engine_model
        self.production_model = production_model
        self.year = year
    
    def run(self):
        print("Car is running.")
        
    def stop(self):
        print("Car is stopped.")

class Train(Transportation):
    
    def __init__(self, brand, engine_model, production_model, year):
        self.brand = brand
        self.engine_model = engine_model
        self.production_model = production_model
        self.year = year
    
    def run(self):
        print("Train is running.")
        
    def stop(self):
        print("Train is stopped.")
        
class Airplane(Transportation):
    
    def __init__(self, brand, engine_model, production_model, year):
        self.brand = brand
        self.engine_model = engine_model
        self.production_model = production_model
        self.year = year
    
    def run(self):
        print("Airplane is flying.")
        
    def stop(self):
        print("Airplane is landed.")

（2）根据用户输入的随机值，随机派遣交通工具：

import random

def dispatch_vehicle(num):
    if num == 0:
        return Car("Volvo", "XL-1000", "SUV-2", "2019")
    elif num == 1:
        return Train("CRH-500", "AC-1000", "Passenger-2", "2021")
    elif num == 2:
        return Airplane("Boeing", "PW-2000", "747-400", "2010")
    else:
        return None

# 随机生成模数
input_num = random.randint(1, 100)
vehicle = dispatch_vehicle(input_num % 3)

if vehicle is not None:
    vehicle.run()
else:
    print("No vehicle dispatched.")