while True:
 
 print(info_str)
 action = input("请输入想要进行的操作:")
 
 if action == '0':

  print("再见。")
  break
 elif action == '1':
  print("新建学生信息")

 elif action == '2':
  print("显示全部学生")

 elif action == '3':
  print("查询学生信息")

 elif action == '4':
  print("删除学生信息")

 elif action == '5':
  print("修改学生信息")

 else:
  print("你的输入有错误，请重新输入。")

info_str = """
*************************
1.新建学生信息
2.显示全部学生
3.查询学生信息
4.删除学生信息
5.修改学生信息
0.退出系统
*************************
"""

"""姓名、语文成绩、数学成绩、英语成绩、总分"""
students = [
 {'Name':'张大炮','Chinese':'95','Math':'65','English':'65','Score':'215'},
 {'Name':'张益达','Chinese':'65','Math':'95','English':'65','Score':'215'},
 {'Name':'Snack','Chinese':'65','Math':'65','English':'95','Score':'215'},
]


while True:
 """"程序主循环"""
 print(info_str)
 action = input("请输入想要进行的操作:")
 
 if action == '0':
  """结束条件"""
  print("撒由那拉。")
  break
 elif action == '1':
  print("新建学生信息")
  Name = input("请输入名字:")
  Chinese = input("请输入语文成绩:")
  Math = input("请输入数学成绩:")
  English = input("请输入英语成绩:")
  Score = int(Chinese) + int(Math) + int(English)
  student={
   'Name':Name,
   'Chinese':Chinese,
   'Math':Math,
   'English':English,
   'Score':Score
   }
  students.append(student)
 elif action == '2':
  print("显示全部学生")
  for student in students:
   print(student)
 elif action == '3':
  print("查询学生信息")
  Name = input('请输入需要查询的名字:')
  for student in students:
   if student['Name'] == Name:
    print(student)
  else:
    print("{}信息不存在".format(Name))
 elif action == '4':
  print("删除学生信息")
  Name = input("请输入需要删除的名字:")
  for student in students:
   if student['Name'] == Name:
    students.remove(student)
    break
  else:
   print("{}信息不存在".format(Name))
 elif action == '5':
  print("修改学生信息")
  Name = input("请输入需要修改的名字:")
  for student in students:
   if student['Name'] == Name:
    student['Name'] = input("请输入名字:")
    student['Chinese'] = input("请输入语文成绩:")
    student['Math'] = input("请输入数学成绩:")
    student['English'] = input("请输入英语成绩:")
    student['Score'] = int(student['Chinese']) + int(student['Math']) + int(student['English']) 
  else:
   print("{}信息不存在".format(Name))
 else:
  print("你的输入有错误，请重新输入。")