write() argument must be str not stringvar-CodePudding

I don't know what can I do, so I'm asking for help. When I click that "submitting_button" error occur "write() argument must be str not stringvar"

import tkinter as tk

from tkinter import ttk, Label, Button, Entry, Place, Pack, StringVar

class Datasaver:
    def __init__(self, GUI,):
        self.GUI = GUI
        GUI.title("Dataver")

        self.label = Label(GUI, text="More comfortable method for saving data!",font=("Arial", 20))
        self.label.place(relx = 0.1, rely = 0.5, anchor = 'sw')
        self.submitting_button = Button(GUI, text="submit", command=self.submitting_button)
        self.submitting_button.place(relx = 0.9, rely = 0.9, anchor = 'sw')
        self.close_button = Button(GUI, text="Exit", command=GUI.quit)
        self.close_button.place(relx = 0.9, rely = 1.0, anchor = 'sw')
        self.butt = Button(GUI, text="create", command=self.create)
        self.butt.place(relx = 0.9, rely = 0.8, anchor = 'sw')
        self.labelel = Label(GUI, text="Username:")
        self.labelel.place(relx = 0.0, rely = 0.8, anchor = 'sw')
        self.labelel = Label(GUI, text="Password:")
        self.labelel.place(relx = 0.0, rely = 0.9, anchor = 'sw')
        self.labelel = Label(GUI, text="E-mail:")
        self.labelel.place(relx = 0.0, rely = 1.0, anchor = 'sw')
        self.entry = Entry(GUI, textvariable = name_variable, show="*", font=("Arial", 10))
        self.entry.place(relx = 0.2, rely = 0.9, anchor = 'sw')
        self.entry2 = Entry(GUI, textvariable = password_var, font=("Arial", 10))
        self.entry2.place(relx = 0.2, rely = 1.0, anchor='sw')
        self.entry3 = Entry(GUI, textvariable = Email_var, font=("Arial", 10))
        self.entry3.place(relx = 0.2, rely = 0.8, anchor='sw')

    def create(self):
        f = open("myfile.txt", "x")
        
    def submitting_button(self):
        file = open("myfile.txt", "w", encoding="utf8")
        file.write(name_variable)
        file.write(password_var)
        file.write(Email_var)
        file.close()
        
        name=name_variable.get()
        password=password_var.get()
        Email=Email_var.get()
        print("Nickname: "   name)
        print("Password: "   password)
        print("Email: "   Email)
        name_variable.set("")
        password_var.set("")
        Email_var.set("")
        
        
root = tk.Tk()
root.resizable(False, False)
root.geometry('600x350') 

name_variable=StringVar()
password_var=StringVar()
Email_var=StringVar()

my_gui = Datasaver(root)

root.mainloop()

CodePudding user response：

To extend on Barmar's answer:

StringVar is a Tkinter class that helps manage the values of a widget. As such a StringVar object holds a string (in it's value attribute) but is not a string itself.

file.write() on the other hand expects a string.

As explained here Access StringVar() as a normal string in python you can get the value of the StringVar variable by using the get() method.

To make it short, all you need to do is change the following lines:

def submitting_button(self):
    # ...
    file.write(name_variable.get())
    file.write(password_var.get())
    file.write(Email_var.get())
    # ...