如何从 txt 文件中打印用户特定的文本

Question

有人可以帮助我让我的程序打印用户特定信息，该信息基于哪个用户从 txt 文件上的信息登录到该程序。我的程序中有一个菜单，它只通过输入 "vm" 来显示当前用户的任务。这应该只显示分配给用户的任务。我能够向用户显示所有用户的所有任务，但我如何从 txt 文件中仅提取用户特定信息。

txt文件如下：

User assigned to task:

admin

Task Title :

Help

Task Description:

Help Granny

Task Due Date:

2020-01-24

Date Assigned:

2020-01-24

Task Completed:

No

........................

User assigned to task:

johndoe

Task Title :

Walk

Task Description:

Walk the dog

Task Due Date:

2020-01-26

Date Assigned:

2020-01-24

Task Completed:

No

如果我只想打印 johndoe 的任务，我将如何完成最后一行代码

我目前的代码如下：

import datetime
users = {}
with open ('user.txt', 'rt')as username:
    for line in username:
        username, password = line.split(",")
        users[username.strip()] = password.strip()  # strip removes leading/trailing whitespaces

uinput = input("Please enter your username:\n")
while uinput not in users:
    print("Username incorrect.")
    uinput = input("Please enter a valid username:\n")

if uinput in users:
            print ("Username correct")

with open('user.txt', 'rt') as password:
    for line in password:
        username, password = line.split(",")
        users[password.strip()] = username.strip()  # strip removes leading/trailing whitespaces

uinput2 = input("Please enter your password:\n")
while uinput2 not in users:
    print("Your username is correct but your password is incorrect.")
    uinput2 = input("Please enter a valid password:\n")

if uinput2 in users:
    password2 = ("Password correct")
    print (password2)

if password2 == ("Password correct"):
        menu = (input("\nPlease select one of the following options:\nr - register user\na - add task\nva - view all tasks\nvm - view my tasks\ne - exit\n"))
        if menu == "r" or menu == "R":
                    new_user = (input("Please enter a new user name:\n"))
                    new_password = (input("Please enter a new password:\n"))
                    with open ('user.txt', 'a')as username:
                            username.write("\n" + new_user + ", " + new_password)
        elif menu == "a" or menu == "A":
            task = input("Please enter the username of the person the task is assigned to.\n")
            while task not in username:
                task = input("Username not registered. Please enter a valid username.\n")

            else:
                task_title = input("Please enter the title of the task.\n")
                task_description = input("Please enter the task description.\n")
                task_due = input("Please input the due date of the task. (yyyy-mm-dd)\n")
                date = datetime.date.today()
                task_completed = False
                if task_completed == False:
                    task_completed = "No"
                else:
                    task_completed = ("Yes")
                with open('tasks.txt', 'a') as task:
                    task.write("\nUser assigned to task:\n" + uinput + "\nTask Title :"  + "\n" + task_title + "\n" + "Task Description:\n" + task_description + "\n" + "Task Due Date:\n" + task_due + "\n" + "Date Assigned:\n" + str(date) + "\n" + "Task Completed:\n" + task_completed + "\n") 

        elif menu == "va" or menu == "VA":
            all_tasks = open('tasks.txt', 'r')
            text = all_tasks.read()
            all_tasks.close()
            print(text)
        elif menu == "vm" or menu == "VM"

任何帮助将不胜感激。谢谢

Answer 1

这段代码使用正则表达式并从您在上面粘贴的文本文件中提取所需的字段。我将您发布的确切内容复制到一个文本文件中。我将文件命名为 sample_text.txt

选项 1： 这将提取分配给他们的所有用户名、任务和任务描述。

import re
with open('sample_text.txt','r') as fl:
    lst = re.findall('.*\n*(User assigned to task:).*\n*(.*)\n*(Task Title :)\n*(.*)\n*(Task Description:)\n*(.*)\n*', fl.read())
for item in lst:
    print(f'"{item[1]}" is assigned with "{item[5]}"')


Output:
> "admin" is assigned to "Help Granny"
  "johndoe" is assigned to "Walk the dog"

选项 2： 这将询问您感兴趣的用户名，然后仅提取这些用户详细信息。

import re
name = input('Enter the name of the user:')
with open('sample_text.txt','r') as fl:
    lst = re.findall('.*\n*User assigned to task:.*\n*(' + re.escape(name) + ')\n*Task Title :\n*(.*)\n*Task Description:\n*(.*)\n*', fl.read())

for item in lst:
    print(f'"{item[0]}" is assigned with task "{item[1]}" and task description "{item[2]}"')

Output:
> Enter the name of the user:johndoe
> "johndoe" is assigned with task "Walk" and task description "Walk the dog"

如何从 txt 文件中打印用户特定的文本

How to print user specific text from a txt file

python

printing

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