编辑TXT文件的特定部分并保存更改

Question

我正在尝试从TXT文件显示信息，然后保存所做的任何更改，然后将其写回TXT文件。

            with open("tasks.txt", 'r') as t_file:
                for line in t_file:
                    if line.startswith(username):
                        users_tasks_list.append(line)
                        for count, ele in enumerate(users_tasks_list, 1):
                            if task_select == int(count):
                                task_info = ele.split(",")
                                # I want to display the information in this format
                                print("\n" + " Task:\t\t" + task_info[1]
                                      + "\n" + "Assigned to:\t\t " + task_info[0]
                                      + "\n" + "Date assigned:\t" + task_info[3]
                                      + "\n" + "Due date:\t\t" + task_info[4]
                                      + "\n" + "Task complete?\t" + task_info[5]
                                      + "\n" + "Description:"
                                      + "\n" + task_info[2])

                                while True:
                                    # If the task is not completed entering 1 must change No to Yes
                                    # Entering 2 should allow you to edit the user of the task or the due date
                                    task_edit = int(input("\nEnter 1 to mark the task as complete \nEnter 2 to edit the task \nEnter 0 to return \n"))
                                    if task_edit == 1:
                                        task_info[5] = "Yes"
                                        t_file = open("tasks.txt", "w")
                                        user_tasks = " ".join(users_tasks_list)
                                        t_file.write(user_tasks)
                                        t_file.close()
                                        print("Task completed")
                                        

                                    elif task_edit == 2:
                                        print("success")
                                        if task_info[5] == "No":
                                            task_change = int(input("\nEnter 1 to edit the User \nEnter 2 to edit the due date of the task \n"))

这就是我所拥有的，我正在努力将信息保存回TXT文件。

TXT文件上的信息以下面的格式：

分配给（例如用户），任务标题，任务说明，分配的日期（格式：DD MMM yyyy），到期日期（格式：DD MMM YYYY），任务完成（例如NO）

每个任务都应在新线路上。

任何帮助将不胜感激。