Working example with global variable and two windows. It uses only one mainloop() and Toplevel() to create second window. import tkinter as tk # — functions — def main(): #inform function to use external/global variable global int_var # only if you will use `=` to change value root = tk.Tk() root.title(“Root”) # change global variable … Read more
In your code, the label is placed, and after 2 seconds it is destroyed. It is never actually shown in your window however as it is not updated. This is as when entering Tk’s mainloop, it updates the window in a loop, checking if changes have been made. In your case, you are preventing this … Read more
age = “” try: age = self.age_var.get() except ValueError: showinfo(“Error:”, “Please Enter A Number In Age Field.”) Have a look Here 9 solved Getting UnboundLocalError: local variable ‘age’ referenced before assignment error
Take a look at this example: from tkinter import * root = Tk() def run(): global rep if var.get() == 1: print(‘Hey’) rep = root.after(1000,run) #run the function every 2 second, if checked. else: root.after_cancel(rep) #cancel if the checkbutton is unchecked. def step(): print(‘This is being printed in between the other loop’) var = IntVar() … Read more
You cannot stop each draw statement unless you provide a checker in between each line drawn. The below code is just a rough mock up of how you could make something to check for a tracking variable used to tell it to no longer draw new lines. The closest thing you can do to being … Read more
You need to unbind the event. state=”disabled”/state=DISABLED makes button disabled but it doesn’t unbind the event. You need to unbind the corresponding events to achieve this goal. If you want to enable the button again then you need to bind the event again. Like: from Tkinter import * def printSomething(event): print(“Print”) #Start GUI gui = … Read more
It took me quite some time to figure out what you want to do. If you haven’t found a solution to your problem yet, here is some code to try out. The first thing you should do is declare a global variable to store all maze blocks. blocks = [] # create a list for … Read more
Here is a simple example of getting the filenames inside of a given directory and displaying them as buttons to be selected from. This example will only work with a directory containing only text files but it should serve to provide a good example. Here I use the os import and use the method from … Read more
Try this: import tkinter as tk root = tk.Tk() root.geometry(“500×300+10+13”) root.title(“Test”) b = tk.Button(root, text=”click me”) def onclick(evt): w = evt.widget w.destroy() b.bind(“<Button-1>”, onclick) b.pack() root.mainloop() 13 solved How to destroy widgets?
It is minimal example which create database with two elements and later it uses data from database to fill Treeview You have to use create() only once. import tkinter as tk from tkinter import ttk import sqlite3 def create(con): cur = con.cursor() cur.execute(”’CREATE TABLE IF NOT EXISTS user ( id INTEGER PRIMARY KEY, name TEXT … Read more
Add ZeroDivisionError to the list of your exceptions: except (SyntaxError, NameError, ZeroDivisionError): 1 solved Divide by zero error input into Tkinter message for a calculator
Assigned variables are just that. Assigned by the coder. I have variable_name = object. If there are Tkinter specific variables being used at some point it is most likely a PSEUDO-CONSTANT that is used in arguments within the methods of tkinter. You should never try to change predefined variables that are part of the tkinter … Read more
So I had a little bit of a play around and I think this is what your after. I also changed your code a little bit as I always feel its best to put self infront of all widgets on multiclass applications. import tkinter as tk class FirstFrame(tk.Frame): def __init__(self, master, **kwargs): tk.Frame.__init__(self, master, **kwargs) … Read more
Use two dicts to do the mapping, one from letters to encryption_code and the reverse to decrypt: letters=”ABCDEFGHIJKLMNOPQRSTUVWXYZ” encryption_code=”LFWOAYUISVKMNXPBDCRJTQEGHZ” enc = dict(zip(letters,encryption_code)) dec = dict(zip(encryption_code, letters)) s = “HELLO WORLD” encr = “”.join([enc.get(ch, ch) for ch in s]) decr = “”.join([dec.get(ch, ch) for ch in encr]) print(encr) print(decr) Output: IAMMP EPCMO HELLO WORLD Using your … Read more
The solution is to pass the function as a lambda: from Tkinter import * root =Tk() def callback(parameter): print parameter button = Button(root, text=”Button”, command=lambda: callback(1)) button.pack() root.mainloop() Also, as @nbro already correctly pointed out, the button attribute is command, not function. 1 solved Tkinter Function attached to Button executed immediately [duplicate]