Question

我是python的新手，我正在尝试创建一个按钮函数，该函数可以将新数据写入文件，并且如果写入的数据匹配，则从配置文件中读取加载数据。

我面临的问题在这里：

第12行：如果list_of_files中有名字信息：

代码没有运行循环的if语句-也许我与文件匹配的变量出错了？

代码：

from tkinter import *
import tkinter.messagebox
import os

def register_user():
    firstname_info = firstname.get()
    lastname_info = lastname.get()
    iden_info = iden.get()
    email_info = email.get()

    list_of_files = os.listdir()

    if firstname_info in list_of_files:
        file1 = open(firstname_info, "r")
        verify = file1.read().splitlines()
        if lastname_info in verify:
            if iden_info in verify:
                if email_info in verify:
                    print("it worked")
        else:
            print("user not found")

def main_screen():
    global screen
    screen = Tk()

    global firstname
    global lastname
    global iden
    global email

    firstname = StringVar()
    lastname = StringVar()
    iden = StringVar()
    email = StringVar()

    header = Label(text = "Header")
    firstname_label = Label(text = "Firstname")
    lastname_label = Label(text = "lastname")
    iden_label = Label(text = "Student ID")
    email_label = Label(text = "Student Email")

    header.grid(row=0, column=1)
    firstname_label.grid(row=1, column=0)
    lastname_label.grid(row=2, column=0)
    iden_label.grid(row=3, column=0)
    email_label.grid(row=4, column=0)

    b1 = Button(text = "Submit", command = register_user)
    b1.grid(row = 5, column = 1)

    global firstname_entry
    global lastname_entry
    global iden_entry
    global email_entry

    firstname_entry = Entry(textvariable = firstname)
    firstname_entry.grid(row = 1, column = 1)
    lastname_entry = Entry(textvariable = lastname)
    lastname_entry.grid(row = 2, column = 1)
    iden_entry = Entry(textvariable = iden)
    iden_entry.grid(row = 3, column = 1)
    email_entry = Entry(textvariable = email)
    email_entry.grid(row = 4, column = 1)

    screen.mainloop()

main_screen()

谢谢

Answer 1

如果您在stored data的同一目录中运行脚本，则该脚本应该像os.listdir()那样在当前目录.的目录中搜索文件。但是，最好在stored data中指定os.listdir()的目录，例如os.listdir('/path/to/stored/data')。另外，我认为下面的代码块：

if firstname_info in list_of_files:
    file1 = open(firstname_info, "r")
    verify = file1.read().splitlines()
    if lastname_info in verify:
        if iden_info in verify:
            if email_info in verify:
                print("it worked")
    else:
        print("user not found")

应更改为：

if firstname_info in list_of_files:
    print('user profile found')
    with open(firstname_info, "r") as file1:
        verify = file1.read().splitlines()
        if lastname_info in verify and iden_info in verify and email_info in verify:
            print("it worked")
        else:
            print("user info incorrect")
else:
    print("user profile not found")

Answer 2

您没有将数据从GUI写入任何文件。从文件 firstname_info 中读取之前，应先创建它。

您可以按以下代码修改 register_user（）函数

def register_user():
    firstname_info = firstname.get()
    lastname_info = lastname.get()
    iden_info = iden.get()
    email_info = email.get()

    list_of_files = os.listdir()

    if firstname_info in list_of_files:
        file1 = open(firstname_info, "r")
        verify = file1.read().splitlines()
        if lastname_info in verify:
            if iden_info in verify:
                if email_info in verify:
                    print("it worked")
        else:
            print("user not found")
    else:
        file1 = open(firstname_info, "w")
        file1.write(lastname_info+"\n"+iden_info+"\n"+email_info)
        file1.close()

TKINTER：如果条目与存储的数据匹配，则读取文件？

2 个答案: