无法进入 tkinter，python

Question

I'm new to coding and I'm trying to grab an input from an entry using tkinter in python. In theory, I should click the 'upload' button, then the code will get the entry and print it for me, but this isn't working. This is my code.

from tkinter import *

root = Tk()
frame = Frame(root)
frame.pack()

def cancel():
    quit()

def upload():
    Entry.get()
    print(Entry)



bottomframe = Frame(root)
bottomframe.pack( side = BOTTOM )

whitebutton = Entry(frame, fg="black")
whitebutton.pack( side = TOP)

redbutton = Button(frame, text="Cancel", fg="red", command = cancel)
redbutton.pack( side = LEFT)

bluebutton = Button(frame, text="Upload URL", fg="blue", command = upload)
bluebutton.pack( side = RIGHT )

root.mainloop()

Does anyone know what's going wrong here? Thanks, Kieran.

Answer 1

Entry is a class in __init__ file in tkinter folder.

Instead of this:

Entry.get()
print(Entry)

This is what you need

var=whitebutton.get()
print(var)

Answer 2

First of all, it is better to use Tkinter variables rather than normal python variables. Here you need to use StringVar() to set and get an user input from entry. So the complete code -

from tkinter import *

root = Tk()
var = StringVar()

frame = Frame(root)
frame.pack()

def cancel():
    quit()

def upload():
    print(var.get())



bottomframe = Frame(root)
bottomframe.pack( side = BOTTOM )

whitebutton = Entry(frame,textvariable=var ,fg="black")
whitebutton.pack( side = TOP)

redbutton = Button(frame, text="Cancel", fg="red", command = cancel)
redbutton.pack( side = LEFT)

bluebutton = Button(frame, text="Upload URL", fg="blue", command = upload)
bluebutton.pack( side = RIGHT )

root.mainloop()

For more info - this and this

Answer 3

put root var before root.mainloop()
and make app var and put into "Application(root)"
then change ""root".mainloop()" to "app.mainlop()"

import tkinter as tk

// your code

root = tk.Tk()
app = Application(root)
app.mainloop()