Python 实验五 组合数据类型

• 实验目的

1. 了解python中组合数据类型
2. 掌握各种组合数据类型处理函数

• 实验内容

1. 已知列表list_1=[7,8,9,10]和list_2=[3,4],请将这两个列表合并位一个列表，并将合并后的列表中的元素按降序排列。

   list_1 = [7, 8, 9, 10]
   list_2 = [3, 4]
   merged_list = list_1 + list_2
   merged_list.sort(reverse=True)
   print(merged_list)
   

2. 已知元组tup_1=(‘p’,’y’,’t’,[‘o’,’n’])，请向元组的最后一个列表中添加新元素’h’

   list_1 = [7, 8, 9, 10]
   list_2 = [3, 4]
   merged_list = list_1 + list_2
   merged_list.sort(reverse=True)
   print(merged_list)
   

3. 已知字符串str=’sdfghjkkijuhgfrd’，请统计该字符串中各字母出现的次数

   str_example = 'sdfghjkkijuhgfrd'
   letter_counts = {}
   for letter in str_example:
       if letter.isalpha():
           letter_counts[letter] = letter_counts.get(letter, 0) + 1
   for letter, count in letter_counts.items():
       print(f"{letter}: {count} 次")
   

4. 已知列表list_1=[1,2,1,2,3,2,5,6,7,5,9],请删除列表中的重复数据。

   list_1 = [1, 2, 1, 2, 3, 2, 5, 6, 7, 5, 9]
   unique_list = list(set(list_1))
   print(unique_list)
   

5. 请完成实训案例：十大歌手    计票机制    手机通讯录

   def calculate_average_score(scores):
       scores.sort()
       trimmed_scores = scores[1:-1]
       average_score = sum(trimmed_scores) / len(trimmed_scores)
       return average_score
   def main():
       num_players = 3
       num_judges = 10
       all_scores = []
       for _ in range(num_players):
           player_scores = [float(input(f"请输入第{_ + 1}位选手的第{j + 1}个评委的分数: ")) for j in range(num_judges)]
           all_scores.append(player_scores)
       for i, player_scores in enumerate(all_scores):
           average_score = calculate_average_score(player_scores)
           print(f"第{i + 1}位选手的平均分为: {average_score}")
   if __name__ == "__main__":
       main()
   

   class Contact:
       def __init__(self, name, phone_number):
           self.name = name
           self.phone_number = phone_number
   class PhoneBook:
       def __init__(self):
           self.contacts = []
       def add_contact(self, name, phone_number):
           contact = Contact(name, phone_number)
           self.contacts.append(contact)
           print(f"联系人 {name} 已添加到通讯录")
       def view_contacts(self):
           if not self.contacts:
               print("通讯录为空")
           else:
               print("通讯录:")
               for contact in self.contacts:
                   print(f"{contact.name}: {contact.phone_number}")
       def delete_contact(self, name):
           for contact in self.contacts:
               if contact.name == name:
                   self.contacts.remove(contact)
                   print(f"联系人 {name} 已从通讯录中删除")
                   return
           print(f"未找到联系人 {name}")
       def update_contact(self, name, new_phone_number):
           for contact in self.contacts:
               if contact.name == name:
                   contact.phone_number = new_phone_number
                   print(f"联系人 {name} 的联系方式已更新为 {new_phone_number}")
                   return
           print(f"未找到联系人 {name}")
       def search_contact(self, name):
           for contact in self.contacts:
               if contact.name == name:
                   print(f"联系人 {name} 的联系方式为 {contact.phone_number}")
                   return
           print(f"未找到联系人 {name}")
   def main():
       phone_book = PhoneBook()
       while True:
           print("\n请选择操作:")
           print("1. 添加联系人")
           print("2. 查看通讯录")
           print("3. 删除联系人")
           print("4. 修改联系人信息")
           print("5. 查找联系人")
           print("0. 退出")
           choice = input("请输入数字选择操作: ")
           if choice == "1":
               name = input("请输入联系人姓名: ")
               phone_number = input("请输入联系人电话号码: ")
               phone_book.add_contact(name, phone_number)
           elif choice == "2":
               phone_book.view_contacts()
           elif choice == "3":
               name = input("请输入要删除的联系人姓名: ")
               phone_book.delete_contact(name)
           elif choice == "4":
               name = input("请输入要修改的联系人姓名: ")
               new_phone_number = input("请输入新的电话号码: ")
               phone_book.update_contact(name, new_phone_number)
           elif choice == "5":
               name = input("请输入要查找的联系人姓名: ")
               phone_book.search_contact(name)
           elif choice == "0":
               print("程序已退出")
               break
           else:
               print("无效的选择，请重新输入")
   if __name__ == "__main__":
       main()
   

   class Player:
       def __init__(self, name, votes):
           self.name = name
           self.votes = votes
   
   def main():
       num_players = int(input("请输入参赛选手的人数: "))
   
       players = []
       for i in range(num_players):
           name = input(f"请输入第{i + 1}位选手的姓名: ")
           votes = int(input(f"请输入第{i + 1}位选手的票数: "))
           player = Player(name, votes)
           players.append(player)
   
       # 按照票数降序排序
       sorted_players = sorted(players, key=lambda x: x.votes, reverse=True)
   
       # 输出排序后的成绩
       print("\n排名结果:")
       for i, player in enumerate(sorted_players):
           print(f"{i + 1}. {player.name}: {player.votes} 票")
   
   if __name__ == "__main__":
       main()