Display a label while pressing the button in my GUI

Mon Jan 30 04:31:01 EST 2017

hmmeeranrizvi18 at gmail.com wrote:
> Hello Guys,
> Here i am creating a GUI which will act as a search engine that will find
> the results from the browser and save the results as a xls file. When i
> typed something in my search box and click the (GO)button.It should
> display search in progress.when the file is saved it should display done.
> How to do that? My button gets hung for a seconds.We should give any
> timeout for that?

Move the actual processing into another thread and have it communicate with 
your GUI through a Queue. Here's a sketch:
import Queue
import threading
from Tkinter import *
import mechanize
def clear_search(event):
 search.delete(0, END)
def start_search():
 thread = threading.Thread(
 target=fun,
 args=(search.get(),)
 )
 thread.setDaemon(True)
 thread.start()
 root.after(100, check_state)
def fun(new):
 queue.put("searching")
 url = "http://duckduckgo.com/html"
 br = mechanize.Browser()
 br.set_handle_robots(False)
 br.open(url)
 br.select_form(name="x")
 br["q"] = str(new)
 res = br.submit()
 queue.put("writing result")
 content = res.read()
 with open("result1.xls", "w") as f:
 f.write(content)
 queue.put("done")
def check_state():
 while True:
 try:
 message = queue.get_nowait()
 except Queue.Empty:
 break
 state_info["text"] = message
 if message == "done":
 return
 root.after(100, check_state)
queue = Queue.Queue()
root = Tk()
top_findings = Label(root, text="Top Findings:", font="-weight bold")
top_findings.pack()
search = Entry(root, width=100)
search.insert(0, "Enter the value to search")
# Did you see Christian Gollwitzer's post?
search.bind("<FocusIn>", clear_search)
search.pack()
go_button = Button(root, text="GO", width=5, command=start_search)
go_button.pack()
state_info = Label(root)
state_info.pack()
root.mainloop()