"Python操作字典与列表：创建、存储及动态修改数据"

第一步：生成一个字典，关键字包含年龄，姓名，性别。 ```python info = {"年龄": 0, "姓名": "", "性别": ""} ``` 第二步：生成三个字典，并把他们追加到列表中。 ```python info_list = [] info1 = {"年龄": 25, "姓名": "张三", "性别": "男"} info2 = {"年龄": 30, "姓名": "李四", "性别": "女"} info3 = {"年龄": 22, "姓名": "王五", "性别": "男"} info_list.append(info1) info_list.append(info2) info_list.append(info3) ``` 第三步：把列表用open()写入到内存中。 ```python with open("info_list.txt", "w") as f: for info in info_list: f.write(str(info) + " ") ``` 第四步：设计一个修改模块，能够修改他们的年龄姓名性别等。修改完后替换到内存中。 ```python def update_info(old_info, new_info): old_info.update(new_info) return old_info def load_info_from_file(file_path): with open(file_path, "r") as f: lines = f.readlines() info_list = [eval(line.strip()) for line in lines] return info_list def save_info_to_file(file_path, info_list): with open(file_path, "w") as f: for info in info_list: f.write(str(info) + " ") file_path = "info_list.txt" # 加载内存中的字典列表 loaded_info_list = load_info_from_file(file_path) # 更新字典信息 updated_info = update_info(loaded_info_list[0], {"年龄": 26, "姓名": "张三丰", "性别": "男"}) # 替换内存中的字典列表 save_info_to_file(file_path, [updated_info]) ```