实验五

'''
StudentDoc
学号、姓名、专业、python成绩
打印学生信息，返回课程分数，修改课程分数
'''

class StudentDoc:
    '''学生成绩库的简单类'''
    def __init__ (self,name,student_number,int_python_grade,major):

        self._name = name
        self.student_number = student_number
        self._python_grade = int_python_grade
        self._major = major

    def _increase(self,amount):
        self._python_grade += amount

    def _reduce(self,amount):
        self._python_grade -= amount

    def info(self):
        print(f'{self._name},{self.student_number},{self._python_grade},{self._major}')

    def get_balance(self):
        return  self._balance

a1=StudentDoc('ycq','202013170028',101,'生态')
a2=StudentDoc('wu','202013170027',102,'生态')

a1._increase(5)
a2._reduce(10)
a1._reduce(3)

a1.info()
a2.info()