loops - mainloop() function in python -


i confused put mainloop function in python. when use code:

from tkinter import * import sys window = tk() def mainfunct():     while true:          label = label(window,text="hello world")         label2 = label(window, text = "hello world2")         menu = input("please input something")         if menu == "a":             label.pack()         if menu == "b":             label2.pack()         if menu == "c":             sys.exit()          window.mainloop() mainfunct()

i want label packed when user inputs , when user inputs b want label2 packed. not sure when , why use mainloop. right when run program, gui pops after have inputted , can't input else , think has thing window.mainloop() function because loops on , on again instead of running while true loop again.

i able understand question better based off of comment. let me know if you're looking for:

import tkinter tk  class helloworld(tk.tk):     def __init__(self):         tk.tk.__init__(self)         self.entry = tk.entry(self)         self.button = tk.button(self, text="what's input?", command=self.on_button)         self.button.pack()         self.entry.pack()      def on_button(self):         answer = self.entry.get()         if answer == "a":             print("hello world")         elif answer == "b":             print("hello world 2")         elif answer == "c":             root.destroy()  root = helloworld() root.mainloop()

so when dealing input of user it's better create class , obtain/compare information.

now if answer other a, b, or c there no response program, adjust accordingly.


Comments

Post a Comment

Popular posts from this blog

c# - Validate object ID from GET to POST -

i have method allows user access comment have made on site. have post method lets them update comment. my normal solution send entire comment model through, let them update it, update on database when post back. involve sending commentid through in hiddenfor , can manipulated. how can verify commentid sent in get method same i'm getting in post , not able alter comment wish? how can verify commentid sent in method same i'm getting in post? basically have validate following things in post - user logged-in user. authenticated users post comments. commentid in post , should valid commentid , should present in database. userid associated logged-in user should same userid associated comment . comment should contain userid column, can check @ time of update. to make sure update happens comment has been sent in get - hold commentid in session , in post action compare commentid value in session .
Read more

node.js - Custom Model Validator SailsJS -

when using custom model validator checks record within model. return within spread doesn't seem end control flow. //post.js model /** * custom validator **/ types: { isuservalid: function(user_id) { var promise = require('bluebird'); promise.all([ user.findone({id: user_id}) ]) .spread(function(user) { console.log(user); if (user === null || user === undefined) { console.log('failed'); return false; }else{ console.log('passed'); return true; } }); } }, my response standard validation failed response. { "error": "e_validation", "status": 400, "summary": "1 attribute invalid", "model": "post", "invalidattributes": { "owner": [ { "rule": "isuservalid", ...
Read more

php - Find a regex to take part of Email -

i have following emails need extract part from: bestellnummer xxx: 1 von xxx, 1er pack ------------- anfang der nachricht ------------- foo bar baz foo bar baz // <<<<< need text here ------------- ende der nachricht ------------- ------------- anfang der nachricht ------------- foo bar baz foo bar baz ------------- ende der nachricht ------------- there 0 unlimited occurences of ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- and i'm able extract first part regex: $re = "/------------- .*? -------------.?(.*?).?------------- .*? -------------/s"; but, i'm quite new on learning regex, i'm pretty sure there must better regex extract part (foo bar baz foo bar baz) of text between ------------- anfang der nachricht ------------- ------------- ende der nachricht ------------- as can in different languages, i'm using .? to match between hyphens. i...
Read more