from tkinter import *
from threading import Thread
from time import sleep
import socket
 
class Gui():
    def __init__(self, master):
 
        self.running = 0    #not listening
        self.addr = ""
        self.conn = ""
 
        self.frame = Frame(master)
        self.frame.pack(side = LEFT, anchor = N)
 
        self.startb = Button(self.frame, text = "Start", command = self.startc)
        self.startb.pack(side = LEFT, anchor = N)
 
        self.stopb = Button(self.frame, text = "Stop", command = self.stopc)
        self.stopb.pack(side = LEFT, anchor = N)
 
        self.connectionl = Label(self.frame, text = "not connected")
        self.connectionl.pack(side = LEFT, anchor = SW)
 
 
    def startc(self):
        if self.running == 0:
            self.running += 1
            self.ls = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            port = 9999
            self.ls.bind(('', port))
            print("Server listening on port %s" %port)
            self.ls.listen(1)
            self.ls.settimeout(.05)
            while self.running != 0:
                try:
                    (self.conn, self.addr) = self.ls.accept()
                    print("client is at", self.addr[0], "on port", self.addr[1])
                    self.running = 0
                except:
                    print("attempting to connect")#hangs without this
            if self.conn != "":
                self.rc = ""
                while self.rc != "done":
                    try:
                        self.rc = self.conn.recv(100).decode('utf-8')
                        print("got command", self.rc)
                    except:
                        sleep(.05)
                        print("no info sent yet")#hangs without this
                self.conn.close()
        else:
            self.running = 0
            print("Server not listening")
 
    def stopc(self):
        self.running = 0
 
 
 
 
 
 
root = Tk()
gui = Gui(root)
root.mainloop()