everytime i run my code $,$ I disconect from the server disconect :

import socket

import threading

import tkinter

import tkinter.scrolledtext

class Client:

def $\_\_$init$\_\_($self$,$ username, hostname, port$)$:

self.sock $=$ socket.socket$($socket$.$AF$\_$INET, socket.SOCK$\_$STREAM$)$

try:

self.sock.connect$(($hostname$,$ port$))$

except Exception as e:

print$($f$"$Could not connect to server: $\{$e$\}")$

exit$(1)$

self.username $=$ username

self.gui$\_$done $=$ False

self.running $=$ True

# Start threads for GUI and receiving messages

gui$\_$thread $=$ threading.Thread$($target$=$self.gui$\_$loop$)$

receive$\_$thread $=$ threading.Thread$($target$=$self.receive$)$

gui$\_$thread.start$()$

receive$\_$thread.start$()$

def gui$\_$loop$($self$)$:

# Create main window

self.win $=$ tkinter.Tk$()$

self.win.configure$($bg$=$"lightgray"$)$

self.win.title$("$Chat Client"$)$

# Chat label

self.chat$\_$label $=$ tkinter.Label$($self$.$win, text$=$"Chat:", bg$=$"lightgray", font$=("$Arial$",12))$

self.chat$\_$label.pack$($padx$=20,$ pady$=5)$

# Text area for chat messages

self.text$\_$area $=$ tkinter.scrolledtext.ScrolledText$($self$.$win$)$

self.text$\_$area.pack$($padx$=20,$ pady$=5)$

self.text$\_$area.config$($state$=$"disabled"$)$

# Message label

self.msg$\_$label $=$ tkinter.Label$($self$.$win, text$=$"Message:", bg$=$"lightgray", font$=("$Arial$",12))$

self.msg$\_$label.pack$($padx$=20,$ pady$=5)$

# Text input area

self.input$\_$area $=$ tkinter.Text$($self$.$win, height$=3)$

self.input$\_$area.pack$($padx$=20,$ pady$=5)$

# Send button

self.send$\_$button $=$ tkinter.Button$($self$.$win, text$=$"Send", command$=$self.write$)$

self.send$\_$button.pack$($padx$=20,$ pady$=5)$

self.gui$\_$done $=$ True

self.win.protocol$("$WM$\_$DELETE$\_$WINDOW", self.stop$)$

self.win.mainloop$()$

def write$($self$)$:

# Send message to server

message $=$ f$"\{$self$.$username$\}$: $\{$self$.$input$\_$area.get$(\text{'}1\mathrm{.}0\text{'},$ 'end'$).$strip$()\}"$

self.sock.send$($message$.$encode$())$

self.input$\_$area.delete$(\text{'}1\mathrm{.}0\text{'},$ 'end'$)$

def stop$($self$)$:

# Gracefully stop the client

self.running $=$ False

self.win.destroy$()$

self.sock.close$()$

exit$(0)$

def receive$($self$)$:

# Receive messages from server

while self.running:

try:

message $=$ self.sock.recv$(1024).$decode$()$

if message $==$ "Username:":

self.sock.send$($self$.$username.encode$())$

else:

if self.gui$\_$done:

self.text$\_$area.config$($state$=$"normal"$)$

self.text$\_$area.insert$(\text{'}$end$\text{'},$ message $+"$

$")$

self.text$\_$area.yview$(\text{'}$end$\text{'})$

self.text$\_$area.config$($state$=$"disabled"$)$

except ConnectionAbortedError:

break

except Exception as e:

print$($f$"$Error: $\{$e$\}")$

self.sock.close$()$

break

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

import sys

if len$($sys$.$argv$)<4$:

print$("$Usage: python client.py $")$

else:

username $=$ sys$.$argv$[1]$

hostname $=$ sys$.$argv$[2]$

port $=$ int$($sys$.$argv$[3])$

Client$($username$,$ hostname, port$)$