[Python知识库]Python知识——面向对象编程的案例

以学校、班级、课程、学生数据和功能的整合，来加深面向对象编程的理解与运用。

学校类的定义与使用

lass School:
    school_name = '广师大'

    def __init__(self, address, nickname):
        self.address = address
        self.nickname = nickname
        self.classes = []

    def related_class(self, class_name):
        self.classes.append(class_name)

    def tell_class(self):
        for class_name in self.classes:
            print('%s开设了%s' % (self.nickname, class_name))


# 创建学校
School_While = School('白云', '白云校区')
School_East = School('天河', '东校区')

# 为学校开设班级
# 白云校区开设了python课程、C语言、C++
School_While.related_class('python全栈课程')
School_While.related_class('C语言')
School_While.related_class('C++')

# 东校区开设了爬虫课程、JAVA课程
School_East.related_class('crawler课程')
School_East.related_class('Java课程')

# 查看每个校区开设的班级
School_While.tell_class()
School_East.tell_class()

'''
白云校区开设了python全栈课程
白云校区开设了C语言
白云校区开设了C++
东校区开设了crawler课程
东校区开设了Java课程
'''

班级定义与使用

class Class:
    def __init__(self, name):
        self.name = name
        self.course = None

    def related_course(self, course_name):
        self.course = course_name

# 创建班级
class_computer1 = Class('18计算机1班')
class_computer2 = Class('19计算机2班')

# 修改课程
class_computer1.related_course('C#')
class_computer2.related_course('Java')

print(class_computer1.course)

'''
C#
Java
'''

关联学校与班级

class School:
    school_name = '广师大'

    def __init__(self, address, nickname):
        self.address = address
        self.nickname = nickname
        self.classes = []

    def related_class(self, class_obj):
        self.classes.append(class_obj)

    def tell_class(self):
        print(f'{self.nickname}:')
        for class_obj in self.classes:
            class_obj.tell_course()


# 创建学校
School_While = School('白云', '白云校区')
School_East = School('天河', '东校区')


class Class:
    def __init__(self, name):
        self.name = name
        self.course = None

    def related_course(self, course_name):
        self.course = course_name

    def tell_course(self):
        print('%s开设了%s' % (self.name, self.course))


# 创建班级
class_computer1 = Class('18计算机1班')
class_computer2 = Class('19计算机2班')

# 修改课程
class_computer1.related_course('C++')
class_computer2.related_course('Java课程')



School_While.related_class(class_computer1)



School_East.related_class(class_computer2)

School_While.tell_class()

School_East.tell_class()

学校与班级，课程相关联

class School:
    school_name = '广师大'

    def __init__(self, address, nickname):
        self.address = address
        self.nickname = nickname
        self.classes = []

    def related_class(self, class_obj):
        self.classes.append(class_obj)

    def tell_class(self):
        print(f'{self.nickname}:')
        for class_obj in self.classes:
            class_obj.tell_course()


# 创建学校
School_While = School('白云', '白云校区')
School_East = School('天河', '东校区')


class Class:
    def __init__(self, name):
        self.name = name
        self.course = None

    def related_course(self, course_obj):
        self.course = course_obj

    def tell_course(self):
        print('班级名称:%s ' % self.name)
        self.course.tell_info()


# 创建班级
class_computer1 = Class('18计算机1班')
class_computer2 = Class('19计算机2班')

# 修改课程
class_computer1.related_course('C++')
class_computer2.related_course('Java课程')


School_While.related_class(class_computer1)


School_East.related_class(class_computer2)



class Course:
    def __init__(self, name, period, price):
        self.name = name
        self.period = period
        self.price = price

    def tell_info(self):
        print('<课程名称:[%s] 周期:[%s] 价钱:[%s]>' % (self.name, self.period, self.price))


# 3、创建课程
course_obj1 = Course('python课程', '6个月', 20000)
course_obj2 = Course('linux运维', '5个月', 10000)

class_computer1.related_course(course_obj1)
class_computer2.related_course(course_obj2)

# class_computer1.tell_course()
School_While.tell_class()  #通过学校直接查看
'''
白云校区:
班级名称:18计算机1班 
<课程名称:[python课程] 周期:[6个月] 价钱:[20000]>
'''