Python编程-从入门到实践(源代码)

【实例简介】"""A class that can be used to represent a car."""

class Car():
    """A simple attempt to represent a car."""

    def __init__(self, manufacturer, model, year):
        """Initialize attributes to describe a car."""
        self.manufacturer = manufacturer
        self.model = model
        self.year = year
        self.odometer_reading = 0
        
    def get_descriptive_name(self):
        """Return a neatly formatted descriptive name."""
        long_name = str(self.year) ' ' self.manufacturer ' ' self.model
        return long_name.title()
    
    def read_odometer(self):
        """Print a statement showing the car's mileage."""
        print("This car has " str(self.odometer_reading) " miles on it.")
        
    def update_odometer(self, mileage):
        """
        Set the odometer reading to the given value.
        Reject the change if it attempts to roll the odometer back.
        """
        if mileage >= self.odometer_reading:
            self.odometer_reading = mileage
        else:
            print("You can't roll back an odometer!")
    
    def increment_odometer(self, miles):
        """Add the given amount to the odometer reading."""
        self.odometer_reading = miles

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【核心代码】