python-类

# !/usr/bin/python3.4
# -*- coding: utf-8 -*-



'''
# 类的应用
class Student(object):
    def __init__(self, name, score):
        self.name = name
        self.score = score

    def print_score(self):
        # 如果加上下划线，则外部不能访问
        # bart.print_score()报错
        # print('%s: %s' % (self.__name, self.__score))
        print('%s: %s' % (self.name, self.score))


if __name__ == "__main__":
    bart = Student('Bart_Simpson', 59)
    lisa = Student('Lisa_Simpson', 87)
    # Bart_Simpson:59
    bart.print_score()
    # Lisa_Simpson:87
    lisa.print_score()
'''

'''
# 类的应用
class Student(object):
    def __init__(self, name, score):
        self.name = name
        self.score = score

    def get_grade(self):
        if self.score >= 90:
            return 'A'
        elif self.score >= 60:
            return 'B'
        else:
            return 'C'


if __name__ == "__main__":
    bart = Student('Bart Simpson', 59)
    # Bart Simpson
    print(bart.name)
    # 59
    print(bart.score)
    # C
    print(bart.get_grade())
'''

'''
# 类的继承
class Animal(object):
    def run(self):
        print('Animal is running...')


# 继承多个类
# class Dog(Animal, Runnable):
#     pass

# 类的继承
class Dog(Animal):
    # 如果不写下面的run，那么运行出现的是Animal is running...
    pass

    # 如果有相同的run()，子类覆盖父类
    def run(self):
        print('Dog is running...')


# 类的继承
class Cat(Animal):
    # 如果不写下面的run，那么运行出现的是Animal is running...
    pass

    # 如果有相同的run()，子类覆盖父类
    def run(self):
        print('Cat is running...')


def run_twice(animal):
    animal.run()


if __name__ == "__main__":
    # Dog is running...
    dog = Dog()
    dog.run()
    # Cat is running...
    cat = Cat()
    cat.run()

    # Animal is running...
    run_twice(Animal())
    run_twice(Dog())
    run_twice(Cat())
    # 获得Animal的所有属性和方法
    print(dir(Animal))

'''