How to execute a tkinter in the middle of a Python program

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I have a database that includes students' information. In the middle of the program, I need a Tkinter window to be open. How should I open a GUI window in the middle of a Python program?! The window must include a search box (Entry) by n_number (dictionary value) to show the name (dictionary key related to the entered n_number) of the student and a list of all students. At the same time that I can search by n_number, I need the list of all students, so I can click on each name and see the courses he/she got. I don't know how can I make a clickable list in Tkinter.

...

 from tkinter import *


 class Student:
     def __init__(self):
         self.name = ""
         self.n_number = None
         self.courses = {}
         self.students = {}

     def add_stu(self, name, n_number):
         self.students[name] = n_number

     def find_stu(self, n_number):
         return list(self.students.keys())[list(self.students.values()).index(n_number)]

     def add_course(self, cname, score):
         self.courses[cname] = score

...

tkinter python
4 Answers

Just .destroy your root element after you get what you want from user, consider following simple example:

from tkinter import *
user_input = ""
def get_and_destroy():
    global user_input
    user_input = entry.get()
    root.destroy()
print("Before tkinter")
root = Tk()
entry = Entry(root)
entry.pack()
btn = Button(root, text="Go", command=get_and_destroy)
btn.pack()
mainloop()
print("After tkinter")
print("User typed:",user_input)

As you might observe destroy-ing cause breaking from mainloop()

user_107859750

Create a function with the Tkinter and call it when you need the pop up.

Admin1

To start a Tkinter in the middle of a program, you just declare a Tk() and end it with a .mainloop(). This will stop it from continuing until the window is closed:

from tkinter import *
import time

print('hi')
time.sleep(1)
print('Tkinter starting in:')
time.sleep(1)
print('3')
time.sleep(1)
print('2')
time.sleep(1)
print('1')

root = Tk()
# Put GUI elements in here
root.mainloop()

print('WHY DID YOU LEAVE ME')

As for clickable lists, I would suggest looking into ttk and ttk treeview

user_155351580

To add another window you do Tk()

from tkinter import *
wn = Tk()
wn.title('Window 1')
window = Tk()
window.title('Window2')
user_171703520
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