python chat app - client

import socket, threading
from tkinter import *
from tkinter import scrolledtext
from keyboard import add_hotkey
connected = False
conected2 = False
firstTime = True
firstTimeS = True
f = True
format = 'utf-8'
port = 8080
server = socket.gethostbyname(socket.gethostname())
addr = (server,port)
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
root = Tk(className="- Pychatter")
root.geometry("400x400")
root.configure(bg='blue')
messageVar = StringVar(value="")
usernameVar = StringVar(value="")
def firstConnect():
    print("firs")
    if firstTime:
        print("firstTime")

def connect():
    global connected
    if not connected:
        output.insert(INSERT, "\n[INFO] Connecting to server...")
    try:
        client.connect(addr)
        connected = True
        output.insert(INSERT, "\n[SUCCESS] Connected to server")
    except ConnectionRefusedError:
        output.insert(INSERT, "\n[ERROR]Unable to connect to server")
    except OSError:
        output.insert(INSERT, "\n[ERROR] Already connected or server is down")

def submit():
    global firstTime
    global firstTimeS
    if not firstTime:
        try:
            if firstTimeS:
                client.send(f"FirstTime,{str(usernameVar.get()).capitalize()}".encode(format))
                firstTimeS = False
                print("f time")
                messageVar.set(value="")
            else:
                msg = usernameVar.get().capitalize() + ": "+ messageVar.get()
                client.send(msg.encode('utf-8'))
                print("send")
                messageVar.set(value="")
        except:
            output.insert(INSERT, '\n[ERROR] NOT CONNECTED TO SERVER')
    else:
        usernameVar.set(messageVar.get())
        output.insert(INSERT,"\nWelcome, %s" %messageVar.get())
        messageVar.set(value="")
        firstTime = False

def check():
    print("started")
    global connected
    while True:
        try:
            if connected:
                smsg = client.recv(1024)
                print("msg gotten")
                output.insert(INSERT, "\n"+ smsg.decode('utf-8'))
        except:
            pass

canvas = Canvas(root, width = 400, height = 400, bg="black")
output = scrolledtext.ScrolledText(root, wrap = WORD, bg='black', fg="lime")
output.config(width = 40, height = 15, font = (12))
output.insert(INSERT, 'Welcome to the cave')
message = Entry(root, font = (13),textvariable=messageVar,width = 13, bg = 'black', fg = "lime")
submitButton = Button(root, text="Submit", command = submit, font = (13), bg = "black", fg = 'lime')
connectButton = Button(root, text="Connect to server", command=connect, font = (13), bg="black", fg="lime", activebackground="black", activeforeground ='lime')
clearButton = Button(root, text="Clear", command=lambda: output.delete('1.0', END), font = (12), bg="black", fg="lime", activebackground="black", activeforeground ='lime')
canvas.create_window(300, 330, window = connectButton)
canvas.create_window(200, 330, window = submitButton)
canvas.create_window(150,330, window = clearButton)
canvas.create_window(200, 140, window = output)
canvas.create_window(200, 300, window = message)
add_hotkey('enter', submit)

if __name__ == '__main__':
    output.insert(INSERT, "\nEnter Display Name")
    checkThread = threading.Thread(target=check,daemon=True)
    checkThread.start()
    firstConnectThread = threading.Thread(target=firstConnect, daemon = True)
    firstConnectThread.start()
    canvas.pack(fill=BOTH, expand=True)
    root.tk.call("tk", "scaling", 2.0)
    root.mainloop()