python - Tkinter and Threading -

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i kind of new python , wrote client server based program. client side using tkinter gui , when program enters function communicates server , runs whole program gui freezes. know why happens have no idea how fix in specific program..

from tkinter import * import re import os import socket import os.path import time  maxsize=5000000000 # bigest file u can send  class application(frame):      gateway =socket.socket(socket.af_inet, socket.sock_stream)      def __init__(self, master):         frame.__init__(self, master)         self.grid()         self.creat_widgets()      def creat_widgets(self):          self.instruction1 = label(self,text = "enter ip address:")         self.instruction1.grid(row = 0, column = 0, columnspan = 2, sticky = w)          self.ipentry = entry(self)         self.ipentry.grid(row = 0, column = 1, sticky = w + e)          self.instruction2 = label(self, text = "enter port:")         self.instruction2.grid(row = 1, column = 0, columnspan = 2, sticky = w)          self.portentry = entry(self)         self.portentry.grid(row = 1, column = 1, sticky = w + e)          self.instruction3 = label(self,text = "enter path:")         self.instruction3.grid(row = 2, column = 0, columnspan = 2, sticky = w)          self.pathentry = entry(self)         self.pathentry.grid(row = 2, column = 1, sticky = w + e)           self.send_button = button(self, text = "send file" ,command = self.send_data)         self.send_button.grid(row = 3, column = 0, sticky = w)           self.inbox = text(self, width = 40, height = 5, wrap = word)         self.inbox.grid(row =5,column = 0 , columnspan= 3)      def send_data(self):         content = self.ipentry.get()         if(re.match("^(?:[0-9]{1,3}\.){3}[0-9]{1,3}$",content)):             self.ip = content         else:             self.ip = false         content = self.portentry.get()         if(re.match("^([0-9]{1,4}|[1-5][0-9]{4}|6[0-4][0-9]{3}|65[0-4][0-9]{2}|655[0-2][0-9]|6553[0-5])$",content)):             self.port = content         else:             self.port = false         content = self.pathentry.get()         if os.path.exists(content):             self.path = content         else:             self.path = false          if (self.ip , self.port , self.path):             self.connect()             if os.path.getsize(self.path)<=maxsize:                 self.update_text("sending file......")                 self.sendfile()             else:                 self.update_text("file big (max size 500mb)")         else:             self.update_text("error entrys")        def connect(self):          try:             self.gateway.connect((self.ip, int(self.port)))         except socket.error, msg:             message =  'failed create socket. error code: ' + str(msg[0]) + ' , error message : ' + msg[1]             self.update_text(message)        def sendfile(self):#send file in path entered         self.update_text("sending file......")         tail = os.path.split(self.path)#get files name , extention , send server.         self.gateway.sendall(tail[1])         self.sendlen()         try:             open(str(self.path), 'rb') f:                     data = f.read()                     self.gateway.sendall(data)         except exception, e:             print e         if self.chkprot(self.gateway.recv(10)):             self.update_text("done!")        def sendlen(self):#function handles the sending of length of file.         flen=os.path.getsize(str(self.path))         self.gateway.sendall(str(flen))         while self.chkprot(self.gateway.recv(10))==false:#checks length has been sent , received , no problems occurred.             self.gateway.sendall(str(flen))  #resend file length if problem occurred.       def chkprot(self,num):#received protocol server sent , act accordingly.         if num=="101":             return true         if num=="102":             print "an error has occured"             return false         elif num=="103":             return false        def update_text(self, etext):       #  self.inbox.delete(0.0, end)         self.inbox.insert(0.0, etext)   root = tk() root.title("hcff") root.geometry("300x200")  app = application(root)  root.mainloop()

to avoid freezing interface, can run send_data function in separate thread (using threading module). import , change 1 line inside create_widgets function:

import threading  ...  def creat_widgets(self):     ....     self.send_button = button(self, text = "send file", command = lambda: threading.thread(target=self.send_data).start())

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