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What is Tkinter?
Tkinter is a package for Python to use the Tk GUI toolkit. You can use Tkinter for creating GUI programs through Python. While Tkinter is capable of producing many programs, you might need to use modules for advanced implementations. You should be familiar with the basics of Tkinter before working on Python Tkinter projects:

A Hello World Program in Tkinter
Here’s an example of a hello world program in Tkinter:

import tkinter as tk

class Application(tk.Frame):

def init(self, master=None):

super().init(master)

self.master = master

self.pack()

self.create_widgets()

def create_widgets(self):

self.hi_there = tk.Button(self)

self.hi_there[“text”] = “Hello World\n(click me)”

self.hi_there[“command”] = self.say_hi

self.hi_there.pack(side=”top”)

self.quit = tk.Button(self, text=”QUIT”, fg=”red”,

command=self.master.destroy)

self.quit.pack(side=”bottom”)

def say_hi(self):

print(“hi there, everyone!”)

root = tk.Tk()

app = Application(master=root)

app.mainloop()

Geometry Managers in Tkinter
Another main concept you should know about while working on Python Tkinter projects is geometry managers. Without using a geometry manager, your widgets wouldn’t appear on the screen. There are primarily three ways you can add a geometry manager:

Grid
It adds a grid to the parent and allows it to show widgets accordingly. The grid has rows and columns for measuring the length and height of its widgets.

Pack
This method tells the widget to pack itself within the parent. It only adds the widget to a list of children widgets for the parent. In simple terms, it adds them to a block before it places them in a parent widget.

Place
This method places widgets in a specific location according to the parent widget.

In our tutorial below, we have used the pack manager for handling the position of our widgets. That’s why it’d be best if you’re familiar with these concepts. It would help you to understand the working of our project better.
Building a GUI in Python (Tkinter Tutorial)
Step#1: Importing the Module
To begin working on the application, we first have to import the necessary module. You can do so by importing the module in your namespace. It would allow you to use the constants and classes by their names instead of qualifying them. This means you can use “Label” by using its name instead of qualifying it as “TkinterLabel.” It would make things relatively easy, and you can save a lot of time as qualifying every class and constant can be very cumbersome. Use the following code to import the module:

>>> from Tkinter import *

If Python is not linked to Tk (or Tcl) in your system or if you don’t have Tk (or Tcl) installed in your system, you would see an error message in this section. To fix this issue, you would need your system’s administrator for access. Make sure that you solve this problem by doing the same.

On the other hand, if you don’t see any error messages in these sections, you can move onto the next step to create a window:

>>> win = Tk()

We’ve assigned our window the variable “win.” After implementing the code above, you would get to see a small window on the screen. Its title bar should show “tk” written in it.

This means you’ve completed this step successfully and can now start building GUI in Python.

Step#2: Adding Buttons
Now that we have our Tkinter running, we can add buttons to our program. Buttons are the simplest section of any GUI program, so we’ll start with them:

>>> b1 = Button(win, text=”One”)

>>> b2 = Button(win, text=”Two”)

The window we created in the last section is the parent for the buttons we made now. As you’ll work on more Python Tkinter projects, you’ll find that frames can also act as parents for other classes. Now, when you implement this code, you would notice a strange occurrence – The buttons don’t appear in the window!

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