Unable to reconnect to a socket - sqlite

Question

I am trying to connect to a socket using a client that is running Tkinter. The script runs a banking app allowing users to log in. The user data is stored in an SQLite database. When running the socket and client scripts the Tkinter window launches and the user is able to log in. However, when the user logs out and tries to log in as another user the program gets stuck.
LogInCommand() I think is getting stuck as it only fails when running again. I believe it has to do with how I am discounting from the socket. However, I need the socket to constantly run for the app to work.
Socket :
import socket
import sqlite3
Connection = sqlite3.connect('BankAccounts.sqlite')
st = socket.socket() #Creating a socket object. Second socket is the class.
print("socket ready")
st.bind(("Localhost",8080)) #Creating the socket using port 8080 (IP address + port number)
st.listen(100) #Only allowing a maximum of two connections at a time.
print("waiting for connections")
while True:
Client, address = st.accept() #Creating two variables and setting them equal to the accept object method.
# print("connected with", address)
print("Banking")
cdata = Client.recv(1024).decode()
print("in loop")
if not cdata:
break
if "*li#" in cdata:
print(cdata)
data = cdata.split("*li#")
cred = data[1].split("##")
sql = "SELECT * FROM bankusers"
curser = Connection.execute(sql)
username = cred[0]
password = cred[1]
for row in curser:
if row[0] == username and row[1] == password:
balance = str(row[2])
print(type(balance))
login = ("*Suc*"+balance)
print(login)
Client.send(bytes(f"{login}",'utf-8'))
Client.close()
Client :
from tkinter import *
from tkinter import *
from Bank import *
import socket
root = Tk()
Client = socket.socket()
Client.connect(("Localhost",8080))
import json
login = "Failed"
import sqlite3
Connection = sqlite3.connect('BankAccounts.sqlite')
def localuser(username,password,balance):
user1 = {
"username": username,
"password": password,
"balance" : balance
}
return user1
def sqlupdate():
with open("bankusers.json","r") as file:
reader = json.load(file)
balance2 = reader["balance"]
username2 = reader["username"]
print(balance2)
print(username2)
sql = f"UPDATE bankusers SET balance = {balance2} where username = '{username2}'"
Connection.execute(sql)
Connection.commit()
def updatenewuser(username, amount):
try:
sql1 = f"Select * from bankusers where username = '{username}' "
data = Connection.execute(sql1)
for row in data:
newbalance = int(row[2]) + int(amount)
sql2 = f"Update bankusers Set balance = {newbalance} where username = '{username}'"
Connection.execute(sql2)
except:
print("The user does not exist")
def logout():
canvas.delete("all")
label1 = Label(root,text = "Username")
label2 = Label(root,text = "Password")
global usernamebox
global passwordbox
usernamebox = Entry(root,width = 20)
passwordbox = Entry(root,width = 20)
buttonLogin = Button(root,text = "Login",width=10, command=LoginCommand)
canvas.create_window(230,100,window = label1)
canvas.create_window(230,150,window = label2)
canvas.create_window(400,100,window = usernamebox)
canvas.create_window(400,150,window = passwordbox)
canvas.create_window(400,200,window = buttonLogin)
canvas.pack()
def pay():
if name.get()==username1:
trylabel = Label(root,text= "You are unable to send money to yourself",)
canvas.create_window(400,250,window=trylabel)
else:
canvas.delete("all")
try:
sql2 = f"SELECT * FROM bankusers where username = '{username1}'"
curser = Connection.execute(sql2)
for row in curser:
if int(amountbox.get()) <= row[2]:
print("Sent")
newamount = row[2] - int(amountbox.get())
with open("bankusers.json", "w") as file:
user = localuser(username1,password1,newamount)
json.dump(user,file,indent=3)
sqlupdate()
updatenewuser(name.get(),int(amountbox.get()))
label1 = Label(root,text="Transaction Succsfull")
backbut = Button(root,text= "Done", command=mainscreen)
canvas.create_window(400,100,window=label1)
canvas.create_window(400,200,window=backbut)
else:
canvas.delete("all")
label1 = Label(root,text = "Transaction Failed. Please ensure you have suffcient funds for this transaction")
canvas.create_window(400,200,window=label1)
backbut = Button(root,text= "Done", command=mainscreen)
canvas.create_window(400,300,window=backbut)
except:
label1 = Label(root,text = "Transaction Failed. Please check recipient name and amount")
canvas.create_window(400,200,window=label1)
backbut = Button(root,text= "Done", command=mainscreen)
canvas.create_window(400,300,window=backbut)
def transact():
print("")
canvas.delete("all")
global name
label1 = Label(root,text = "Person Receiving:")
label2 = Label(root,text = "Amount:")
name = Entry(root,width = 20)
global amountbox
amountbox = Entry(root,width = 20)
paybutt = Button(root,text = "Pay", command = pay)
backbutton = Button(root,text = "Back",command = mainscreen)
canvas.create_window(350,300,window=backbutton)
canvas.create_window(450,100,window = name)
canvas.create_window(250,100,window=label1)
canvas.create_window(250,200,window=label2)
canvas.create_window(450,300,window=paybutt)
canvas.create_window(450,200,window=amountbox)
return
def LoginCommand():
count = 1
li = "*li#"
cred = li+usernamebox.get()+"##"+passwordbox.get()
Client.send((bytes(cred,"utf-8")))
message = Client.recv(1024).decode()
print(message)
if "*Suc*" in message:
count = 0
login = "Succsess"
global username1
global password1
global balance1
username1 = usernamebox.get()
password1 = passwordbox.get()
usernamebox.destroy()
passwordbox.destroy()
canvas.delete("all")
balance1 = message.split("*Suc*")
user = localuser(username1,password1,balance1[1])
with open("bankusers.json", "w") as file:
json.dump(user,file,indent=3)
mainscreen()
if count == 1:
global label2
label2 = Label(root,text = "Login Failed. Please Try Again")
canvas.create_window(400,250,window = label2)
def mainscreen():
with open("bankusers.json","r") as file:
reader = json.load(file)
balance2 = reader["balance"]
label2.destroy()
canvas.delete("all")
label1 = Label(root, text = f"Available Balance: R{balance2}")
buttonLogout = Button(root,text = "Log Out", command=logout)
buttonTrans = Button(root,text = "Transact", command=transact)
canvas.create_window(400,100,window = label1)
canvas.create_window(350,200,window=buttonLogout)
canvas.create_window(450,200,window = buttonTrans)
canvas.pack()
root.title("Raindrop Bank")
canvas = Canvas(root, width = 800, height = 400)
label1 = Label(root,text = "Username")
label2 = Label(root,text = "Password")
usernamebox = Entry(root,width = 20)
passwordbox = Entry(root,width = 20)
buttonLogin = Button(root,text = "Login",width=10, command=LoginCommand)
canvas.create_window(230,100,window = label1)
canvas.create_window(230,150,window = label2)
canvas.create_window(400,100,window = usernamebox)
canvas.create_window(400,150,window = passwordbox)
canvas.create_window(400,200,window = buttonLogin)
canvas.pack()
root.mainloop()