Tkinter Entry's get function returns nothing - python-3.x

Question

I'm trying to use an Entry widget to get the user's data and then print it.
Why is Tkinter Entry's get function returning nothing?
This didn't help me.
This is my code
message = ''
# start_chatting function
def start_chatting ():
global message
master2 = tk.Tk()
master2.geometry("1280x720")
master2.title("Messenger")
label = tk.Label(master2, text = "Messenger!!!",bg = '#1e00ff',fg ='yellow',width = 35, height = 5).place(x = 500, y = 0)
username_label = tk.Label(master2,text = usernames[position_counter],bg = '#91806d',fg ='white',width = 10, height = 2).place(x = 0, y = 100)
v = StringVar()
L1 = Label(master2, text = "Type your message : ").place(x=0, y = 680)
e = Entry(master2,textvariable = v)
e.insert(END, '')
e.pack()
e.place(x = 115, y = 680)
submit_button = Button(master2,text = "Submit",command = submit_f).place(x = 200, y = 680)
message = message+ v.get()
master2.mainloop()
#submit_f function
def submit_f ():
global message
print(message)
Keep in mind that this is a part of my code and not all of it.
Thanks in advance!

Answer 1

The function prints nothing beacause you have changed the message value in the current function where the entry box is defined.
So, when you write v.get(), it generally returns an empty text.The message variable needs to call every time when submit button is pressed. Hence, message variable should be changed inside submit_f() function.
Here's the Solution,
import tkinter
from tkinter import *
message = ''
# start_chatting function
def start_chatting ():
global v
master2 = Tk()
master2.geometry("1280x720")
master2.title("Messenger")
label = Label(master2, text = "Messenger!!!",bg = '#1e00ff',fg ='yellow',width = 35, height = 5).place(x = 500, y = 0)
username_label = Label(master2,text = usernames[position_counter],bg = '#91806d',fg ='white',width = 10, height = 2).place(x = 0, y = 100)
L1 = Label(master2, text = "Type your message : ").place(x=0, y = 680)
v = StringVar()
e = Entry(master2,textvariable = v)
e.insert(END, '')
e.pack()
e.place(x = 115, y = 680)
submit_button = Button(master2,text = "Submit",command = submit_f).place(x = 200, y = 680)
master2.mainloop()
#submit_f function
def submit_f ():
global message
message = message + " " + v.get()
print(message)
start_chatting()