"""
定义一个学生类:
要求:
1.属性包括学生的姓名、学号、以及语数英三科的成绩
2.能够设置学生某科目的成绩
3.能都打印出该学生的所有科目成绩
"""


class Student:
 def __init__(self, name, student_id):
 self.name = name
 self.student_id = student_id
 self.grades = {"语文": 0, "数学": 0, "英语": 0}

 def set_score(self, subject, score):
 if subject in self.grades:
 self.grades[subject] = score

 def get_score(self):
 return self.grades

 def print_student_info(self):
 print(f"姓名:{self.name},学号:{self.student_id},分数:{self.grades}")

 def print_grades(self):
 # 下面 2种方式都是对 dict 中 的key进行遍历
 # for subject in self.grades.keys():
 # for subject in self.grades:
 for subject, score in self.grades.items():
 print(f"学生:{self.name}的{subject}学科的成绩为:{score} ")


zhangsan = Student("张三", "001")
print(zhangsan.name)
print(zhangsan.student_id)
print(zhangsan.grades)

print("-------------------")

lisi = Student("李四", "002")
lisi.set_score("语文", 93)
lisi.set_score(subject="数学", score=88)
lisi.set_score("英语", 98)
lisi.print_student_info()

print("-------------------")
print(lisi.print_grades())