```name_list = [] # 存儲學生信息字典，學生信息用字典存，再用列表存儲字典
 
 
# 菜單
def display_menu():
 print("-"*30)
 print(" 學生管理系統(tǒng) v8.8 ")
 print("1.添加學生信息")
 print("2.刪除學生信息")
 print("3.修改學生信息")
 print("4.查詢單個學生信息")
 print("5.查詢所有學生信息")
 print("6.退出系統(tǒng)")  
 print("-"*30)
 
 
# 選擇序號的獲得
def get_choice():
 selected_key = input("請輸入選擇的序號：")
 return selected_key
 
 
# 檢查性別是否合法
def check_sex(new_sex):
 flag = True
 while flag:
 if new_sex == '男' or new_sex == '女':
  flag = False
 else:
  new_sex = input("輸入性別有誤，請重新輸入(男/女)：")
 return new_sex
 
 
# 檢查電話號碼是否合法
def check_phone(new_phone):
 flag = True
 while flag:
 if new_phone.isdigit():
  flag = False
 else:
  new_phone = input("您輸入的電話號碼有誤，請重新輸入：")
 return new_phone
 
 
# 檢查學號是否重復或者有誤
def check_id(new_id):
 flag = True
 while flag:
 # 先檢查是不是純數字再去考慮是否重復的事情，如果不是純數字直接pass
 if new_id.isdigit():
  for i in range(len(name_list)):
  if name_list[i]['id'] == new_id:
   new_id = check_id(input("您輸入的學號重復，請重新輸入："))
  flag = False
 else:
  new_id = input("您輸入的學號有誤，請重新輸入：")
 return new_id
 
 
# 添加學生信息
def add_name():
 new_info = {}
 new_id = check_id(input("請輸入學號："))
 new_info['id'] = new_id
 new_name = input("請輸入姓名：")
 new_info['name'] = new_name
 new_sex = check_sex(input("請輸入性別(男/女)："))
 new_info['sex'] = new_sex
 new_phone = check_phone(input("請輸入電話號碼："))
 new_info['phone'] = new_phone
 name_list.append(new_info)
 print("添加成功！")
 
 
# 查詢所有學生信息
def find_all():
 print("="*30)
 for name in name_list:
 print(name['id'], name['name'], name['sex'], name['phone'])
 print("=" * 30)
 
 
# 刪除學生信息
def del_name():
 del_id_is = input("請輸入要刪除的學生學號：")
 flag = False
 index = 0
 for i in range(len(name_list)):
 if name_list[i]['id'] == del_id_is:
  flag = True
  index = i
  break
 if flag:
 name_list.pop(index)
 print("刪除成功！")
 else:
 print("學生未找到！請檢查學號輸入是否有誤！")
 
 
# 名字修改細節(jié)函數
def choice_of_name(index):
 while True:
 choice = input("請輸入要修改學生的(1.id 2.姓名 3.性別 4.電話號碼，5.全部修改)：")
 if choice == '5':
  new_id = input("請輸入新的學號：")
  name_list[index]['id'] = new_id
  new_name = input("請輸入新的姓名：")
  name_list[index]['name'] = new_name
  new_sex = check_sex(input("請輸入性別(男/女)："))
  name_list[index]['sex'] = new_sex
  new_phone = check_phone(input("請輸入電話號碼："))
  name_list[index]['phone'] = new_phone
  break
 elif choice == '1':
  new_id = input("請輸入新的學號：")
  name_list[index]['id'] = new_id
  break
 elif choice == '2':
  new_name = input("請輸入新的姓名：")
  name_list[index]['name'] = new_name
  break
 elif choice == '3':
  new_sex = check_sex(input("請輸入性別(男/女)："))
  name_list[index]['sex'] = new_sex
  break
 elif choice == '4':
  new_phone = check_phone(input("請輸入電話號碼："))
  name_list[index]['phone'] = new_phone
  break
 else:
  print("輸入有誤，請重新輸入！")
 
 
# 修改學生信息
def re_name():
 id_is = input("請輸入要修改的學生學號：")
 flag = False
 index = 0
 # 先找到要修改的學生的下標
 for i in range(len(name_list)):
 if name_list[i]['id'] == id_is:
  flag = True
  index = i
  break
 if flag:
 choice_of_name(index)
 print("修改成功！")
 else:
 print("修改失敗，學生信息未找到！")
 
 
# 查詢單個學生信息
def find_name():
 find_id_is = input("請輸入要查詢的學生學號：")
 flag = False
 index = 0
 for i in range(len(name_list)):
 if name_list[i]['id'] == find_id_is:
  flag = True
  index = i
  break
 if flag:
 print("學生查詢到，學生信息為：")
 print(name_list[index]['id'], name_list[index]['name'], name_list[index]['sex'], name_list[index]['phone'])
 else:
 print("學生未找到！")
 
 
def main():
 exit_name = True
 while exit_name:
 display_menu()
 key = get_choice()
 if key == '1':
  add_name()
 elif key == '2':
  del_name()
 elif key == '3':
  re_name()
 elif key == '4':
  find_name()
 elif key == '5':
  find_all()
 elif key == '6':
  exit_name = False
 else:
  print("請輸入正確的數值！")
 
 
main()