Calculator with GUI Using Python Tkinter (Less Than 200 lines of Code)

Python project-based learning videos for absolute beginners!
We frequently use built-in programs like calculators without thinking about how they were designed or what's underneath the hood. It's essential for you to think about these things if you want to become a better software developer. The end goal of learning to program is to solve real-world problems and the best way to do so is by working on projects and putting your knowledge to use.
So, in this video, Soyuj demonstrates one such project that can help beginners get started with building projects in Python. By the end of this video, you will learn how to build your own calculator app in less than 200 lines of Python code. Not only that, you will learn to add advanced features like making the calculator usable from the keyboard and creating its executable file.
For this tutorial, we will use the built-in Tkinter module and take inspiration from the standard Windows Calculator App. Remember that the main takeaway from this video should not be just to build a calculator in Python but also to learn things that are often overlooked like how to structure your project and write clean readable Python code.
~
To follow along with this tutorial, you need to have a basic understanding of Python. For that, you can check our resources:
Python for Beginners (KZbin Playlist): • Python for Beginners
Learn Python Programming (Text-based Tutorials): www.programiz.com/python-prog...
Learn Python App (iOS and Android):
Download Link for Android: bit.ly/learn-python-android
Download Link for iOS: apple.co/3iPm6Sx
~
Links Mentioned in the Video:
Python Object-Oriented Programming Playlist: • Python OOP Tutorials
Pycharm IDE: www.jetbrains.com/pycharm/
Source Code in this Video: github.com/programiz/Calculator
~
Timestamps:
0:00 Intro
0:16 Final Calculator Preview
1:45 Building the Calculator
6:04 Creating the Frames
8:40 Adding the Display Labels
13:05 Adding the Digit Buttons
17:25 Adding the Operator Buttons
24:35 Adding Functionality to the Buttons
32:41 Enhancements to the Calculator
33:36 Adding Square and Square Root Buttons
36:50 Changing the Operator Symbols
37:55 Truncating the Results
38:21 Handling Exceptions like ZeroDivisionError
39:13 Using Calculator from the Keyboard
41:45 Creating an .exe file of our Calculator
Find Programiz elsewhere:
Facebook: / programiz
Instagram: / _programiz
LinkedIn: / programiz
Website: www.programiz.com
#python #learnprogramming #programiz #pythonproject #projectbasedlearning

[@defnotsg]

Thank you so much for this amazing video! I really learnt so much things from you and your my favorite youtuber

[@Andryux94]

Thanks for your Video and all your explanation, have a good week-end Man!

[@Lily-fc5li]

thank you , I had so much fun while coding!

[@vishavjeetsharma5824]

came here from your website......awesome youtube channel like your website.......keep uploading good stuff like this...thanks

[@Alex-fk2ie]

Thank you for your tutorial ! It helps me a lot

[@adrienmalosse8782]

Thanks for the tutorial, it helps me a lot, I learnt a lot with this video. You're doing a great job ! I was writing some python code before but never with gui, now I want to learn more from tkinter !!

[@jacobzheng8701]

Thank you for making this video!!😀

[@SarasaYugantha]

One of most underrated guys on the youtube you deserve 10mviews for your amazing tutorials....

[@graphixig]

10 views?🙄

[@SarasaYugantha]

@@graphixig 10m what i should say my bad

[@SarasaYugantha]

Please make more tutorials with designing programs not only python c++ c# php swift things like plz

[@SarasaYugantha]

i learned python for 3months but your this video literally get to me know python

[@marcingarbarczyk7196]

Good work, i love this channel.

[@devadathr6840]

Very useful video. Absolutely advanced and short but still highly effective. Expect more contents from you. I'm new to this Object Oriented Programming. So would like to have some lessons from you. Also I request you to make video on a python GUI Dictionary and a GUI Address/Contact Book. It will be so helpful if it's so. 😍😍

[@noone8740]

Much better than copying to intense music. Tysm.

[@widepootis]

That was a super informative and really nice tutorial to follow along thanks!

[@slickwillie3376]

This is a good learning tool. Thx.

[@glorysonhorace3265]

Am mad at myself for not having met this channel earlier. 😂 Your content is very educative and I really appreciate your work.

[@furqanali8408]

You were great at explaining

[@SL_Beast]

I literally found this on git while browsing lol it's a cool programme. I have my own calculator code on git but it doesn't have any GUI just basic calculations on a good old terminal

[@angelneykov7393]

Thank you, sir!

[@alnajm9952]

Thank you, sir! 😍😍

[@aaryankakad6627]

Eagerly Waiting...🔥

[@tinyfungii]

Very cool Soyuz

[@oyevicuu]

Waiting for it

[@hannahpj6002]

thank you!

[@user-ns7hu2xi5b]

Thanks!

[@bhuvaneshwarig6517]

I FOUND IT!!!! THANK U SO MUH JIIII.......

[@patriciamaliwanag5381]

Thank you so much. can you recommend us a package to test the calculator GUI or any vid that can help us write Calculator GUI?

[@prerit791]

Dhanyabad dai❤

[@Jdeadevil]

I give up, it's really hard to follow along with this because of how convoluted this is compared to every other Tkinter tutorial I've watched. That would be fine, but I'm about half way through, and I've got this problem I cannot figure out, but I have no chance of figuring this out because all the comments are just "I'm going to do this" which has given me no point of reference. This is like more of a video you'd put in your portfolio to prove you're already a genius.

[@genuine0]

Trust me, I have been coding for years, and the only way to learn is to get your hands dirty, and sweat and blood, trials and errors, these tutorials are not going to teach you anything, find some website enrol, take few courses and seek projects, and build projects, preferably with a tutor “hence” tutorial. These guys are here to show off, "look what we can do", and believe me, you need to understand the very basics first, and the concepts, all of the functions and methods are secondary, you will learn them in time and nobody knows all the functions, but you need to know what you’re about to create then look for the right tools to build it, but you need to know how to use those tools. That’s all there is to it. Start learning to code, 20 minutes every day and in three months you will learn to do many things all by yourself. My advice is start learning to use python, C++, JavaScript, etc… and using tkinter, kivy will only teach you how to code with tkinter and kivy, and then if you’re forced to use real coding, you will find yourself stranded in the middle of nowhere.

[@genuine0]

There is no genius, you learn to code like you learn to drive a car, to ride a bike, to play the piano, guitar, or to learn to speak another language the key is practice that’s all, no genius there.

[@David-fq5un]

Yes, it would be nice if he explained more why he is doing things, but I've followed along and it is working. Use your brain and try to think what is happening. Use pencil and paper to go through some of the steps if it helps.

[@amirraja7798]

nice video man

[@gonzaloplazag]

Amazing video! This video deserves 10m like!

[@brokenbackisbad9049]

His razer laptop background matches with the programming language he uses

[@sahasict9887]

thanks thanks thanks good luck

[@riyashrestha3483]

NICE

[@aandresriera7927]

great great video

[@nunomeira3850]

Nice tutorial! help me a lot to learn more. Im starting my journey in python and this challenge is very good. But can I ask you a basic thing? Instead of having all the functions in the main .py can we divide them in different scripts and them import to the main or it has to be all in the same? Thanks

[@Mr-Yuki]

You can. And then you can import them using the import at the top of your script. Look up how import works and you'll learn how easy it is

[@ezikell]

Thank you for this amazing video man! I do wanna know if you know how to make an erase button, where I can just remove one number at a time?

[@DynamoTuber]

def click(value): ex = entryField.get() answer = '' try: if value == 'C': #Here c = Clear button (works like a backspace key) ex = ex[0:len(ex) - 1] entryField.delete(0, END) entryField.insert(0, ex) return This will be your command.... now just insert a button using tkinter button command and you are good to go.

[@autarroy]

sir can you also make a video while i typing a number in the entry widget the number must separate in thousand for example if i'm typing 1200 it must separate 1,200

[@naturebeauty2421]

nice video

[@BruceVayne]

Whats your theme? looks amazing

[@David-fq5un]

Good video overall. Need more explanation why you coded it a certain way or what the code does, not just give the code.

[@pushpitsharma1867]

thank you ap ne mera school me watt badaha deya

[@DevOpsOnSteroids]

When can i get notes on HTML,CSS,React,DBMS on your website.?

[@tomoyaokazaki9915]

Me to waiting

[@lastonline2614]

Waiting....

[@lurxy-ur7126]

There should be a backspace button on the calculator, but how will I make that?

[@SunnyGarasia]

On the output screen which is calculator GUI I can't see the operator symbols other than addition. I can see all the numbers, C, = but can't see other operators which are -,%,*. So can you please help me out with it. I used same syntax that you used.

[@howtoanything5542]

Can anyone tell what is the font he is writing the code in

[@SRMasood]

How will I add the "navigation" button? Where it shows more options to different calculator?

[@hshs510]

What theme are you using?

[@musaisaac4015]

very interesting tutorial.straight forward steps but i had an issue when adding Functionality to the Buttons,it doesnt display the value when clicked even i corrected this line of code "command=lambda x=digit: self.add_to_expression(x)"

[@HudsonLetsPlay]

Lambda is capital, kinda late but hope it helps lol.

[@naturebeauty2421]

but I wanna ask one thing that i am getting error ". calculator has no attribute create_display_frame() so can you tell me it's fix?

[@lostsoul2184]

question . when I add too much numbers the whole window stretches. how can I prevent that ?

[@pawanpal9373]

I am also doing the but it's showing errors because of pack() and grid(), can't use in same class

[@trevesgordio8917]

How to enable backspace in the calculator

[@hajarajdid3051]

What if you want to add trigonometrical functions, how do you do that???

[@kbimero1]

Hello greetings from Venezuela, I am learning python and I decided to do this exercise with you. I'm having trouble using the calculator with the keyboard. I use linux mint, will there be a configuration problem with linux? Thank you for your time. There I send you an extract of the code. Thanks in advance. # using calculator from the keyboard def bind_keys(self): self.window.bind("", lambda event: self.evaluate()) for key in self.digits: self.window.bind(str(key), lambda event, digit = key: self.add_to_expression(digit)) for key in self.operations: self.window.bind(key, lambda event, operator = key: self.append_operator(operator))

[@pietrodante6016]

I had also trouble with the keyboard. Please add to the function bind_keys: self.window.bind("", lambda event: self.clear()) # add clear key self.window.bind("", lambda event: self.square()) # add square key with pressed self.window.bind("", lambda event: self sqrt()) # add square-root key with pressed. I had no trouble with and keys on my keyboard. If you have, try any other key of yourchoice to perform add_to_expression()

[@NamelessFG]

Why is it that after I added the Square and sqrt function lines my equals and clear buttons dissapared in the gui? Great video anways.

[@devscloud7600]

it coulod happen that you put the sq and sqrt button at the same location of clear and equal

[@yadhufr]

calc.run is not showing for me

[@sai24243]

iam getting error like( AttributeError: 'Calculator' object has no attribute 'window)

[@fatimazahra8411]

me too have you fix it ?

[@georg101]

Nice. Could you make a project with pyqt5?

[@TheBajamans]

Thank you so much for this amazing tutorial! I've learned a lot from it. There is only one thing i don't understand and it is why when trying to solve the problem where pressing any key would resulti in only "." being printed on the screen, "lambda x=digit: self.add_to_expression(x)" works, but "lambda: self.add_to_expression(digit)" doesen't. Keep up the amazing work!

[@antoc779]

I believe that in the first case at the moment of calling the self.add_to_expression(digit) through the lambda function the value of the argument (digit) will corrispond to the last value assigned in the loop (In our case "."). In the second case, with lambda x=digit: self.add_to_expression(x) we assign a default argument to x that corrisponds to the value of digit at the step of the loop where the button is created (The button showing "1" will have a default value of "1", "2" of "2" and so on)

[@ovi_4]

Hi, just managed to follow the complete code with NO errors but even then it would just simply not run at all since I just could not install the venc (the virtual environment in python) for some reason. It kept telling me that this computer is missing some permissions for running scripts. So as a result while working on the code I could only rely on no error reporting method (available from within pycharm code window. However, I decided to finalize the code and managed to install pyinstaller in hope that it will run after packing the file into an executable (ready for my win 10 64Bit pro) but to my surprise, the app that I created still doesn't open, and doesn't complain at all. I do not see any error window showing up. I even tried to run the executable file as admin and in compatibility mode but still doesn't work. It is really frustrating after 2 days of working on this code still no joy. Now, what ??? Am I stuck here forever??? Please help anyone outthere. Tnx alot.

[@jackcorsobarbiere-it7645]

me too same problem, did you solved? if yes, how?? @Programiz heeelp

[@tobyinstrumentals5461]

You probably figured it out but I also encountered the same error. Fortunately enough I'm in the era of chatgpt so i was able to find a solution using this command "Set-ExecutionPolicy -Scope CurrentUser RemoteSigned" Paste this command on your terminal when you encounter that problem and it should be fixed. You can then proceed to activate your venv using the activation command. Hopefully this helps

[@NiceToess]

the application allows number keys but what about keypads?

[@shreyapardeshi4848]

Can I perform it on Mac 🤔??

[@umeshchandel8917]

After using bind my calculator is not working can please solve the error

[@umaraliali8241]

Please send the coding text.. Im getting error..while doing eval function

[@ahmedrahat2921]

How to calculate percentage and create button

[@atharvpatole5327]

i'm getting attribure error as 'str' object has no attribute 'tk' @programiz

[@Conversion108]

Can you guys make a browser like chrome

[@williantran4928]

How about making a sin cos tan button sir, pls help me!

[@jahedulbhuiyan4891]

when I write the sqrt(10) ,then why it is not showing the floating number??? only sqtr(9) = 3.0 ,sqrt(4) = 2.0 .......are showing the accurate result

[@johnmandydalag5580]

I can't open the folder using pycharm, no 'open with pycharm" button

[@warrior1276]

i cant seem to be able to change the background colour can u please help me

[@kona_kona14]

i try run this code what he try run in 5.40 but when i run it " Error running 'calc': Cannot run program "C:\Users\Käyttäjä\PycharmProjects\animation\venv\Scripts\python.exe" (in directory "C:\Users\Käyttäjä\Desktop\calculator"): CreateProcess error=2, The system cannot find the file specified" help

[@hackcoder6521]

How to add icon for app

[@rafaelrivera9291]

Is there an exercise to make this calculator?

[@lukeav6097]

why is the window not resizable?

[@enasali1777]

You can not use pick and grid together

[@ayuketaruben]

the cod is run successfully but nothing is displaying on my screen for view. pleas help me out thanks.

[@williantran4928]

How can I make a delete button?

[@kimcaeiro8461]

hi could you please share the entire code in a file. thanks

[@amegbehaeloge1364]

Helpful but can't see it well.if you can zoom it a bit for the views

[@owllinux]

Why was a Lambda function used? When it came to the button(command = lambda:function() ). Why not just the function?

[@David-fq5un]

You can't directly assign a call to a function with an argument as an assignment, only a function name. lamba lets you get around that.

[@krzysztofchruscielski626]

_tkinter.TclError: cannot use geometry manager grid inside . which already has slaves managed by pack?

[@tomoyaokazaki9915]

Also one thing convert that python file into .exe file and share it with us .

[@leomonk974]

That’s not how that works

[@adityaraj04]

@@leomonk974 This kid thinks everything is so simple😂 i guess he doesn't even know how many characters do we write to get a single world hello🙃

[@redstonegod296]

@@adityaraj04 just 4 lines of code to make a simple label texted hello world

[@adityaraj04]

@@alaa6809 c language 🙂

[@dazewaker262]

@@leomonk974 lol that is how it works.

[@user-gt1yp8jz1k]

how to open folder by pycharm

[@ashwinm1825]

tkinter output is not opening,I don't know why? Any one know solution

[@jagrititripathi8308]

Throws error in if __name__ function and gui doesn't run

[@adamviktorklimes405]

You speak very quitely and the effect sound is too loud. Thanks for the video and online python interpreter!

[@tomasbernardo5972]

I have a problem for some time, when I try to open a .exe file that has been created from a python file it opens a console and then it instantly coses it. I'm not sure what should I do to fix this. Any help is appreciated

[@programizstudios]

Hi Tomas, please make sure that .exe file is created successfully with the required command line parameters.

[@karagani_roy]

While making .exe file you have to mention --noconsole and make sure to add mainlooop at end of program.

[@kishansindhi6963]

please upload dart programming video

[@kishansindhi6963]

or upload dart tutorial on website

[@kushalshaw2162]

Where is the source code for this ??

[@anchallama8121]

daju varkhari club house bata aako

[@jackcorsobarbiere-it7645]

NOT WORKING after executing the window not popping out .... calculator is not showing.... im stuck at minute 5 already and can't go on....console gives no errors but just not showing calculator window....how to resolve???

[@David-fq5un]

try starting at the beginning again or copying and pasting just the beginning code from the GitHub.

[@tanverahmed5666]

How can I run on emulator

[@PrivateKero]

This video leaves me with mixed feelings. It shows important solutions that everyone will come across when working with tkinter. But one thing bothers me a lot. In this video there is little explanation of why such decisions were made and what the long-term benefits are. For example, I wondered why we don't fill the dictionary with all the buttons. Later in the video this becomes clear, but the viewer must ultimately make the findings himself. Likewise, the concept of updating the label didn't really make sense to me until later and you just had to accept it during the implementation. In the end, the video probably shows interesting concepts, but doesn't really go into why things are solved this way, but simply does it.

[@Jdeadevil]

It's impossible to debug because none of it explained well at all. I've tried comparing code exactly and I can't explain why I'm having this problem (the numbers appearing at the top but not the bottom display label). But his "I'm just going to---" comments make no sense.

[@PrivateKero]

@@Jdeadevil can you show your code? Maybe I can help.

[@VC-pd6vy]

AttributeError: 'Calculator' object has no attribute 'window' can anyone help me?

[@David-fq5un]

try starting again from scratch. or try copying just the basic start code from his code at GitHub. I had that problem at first, and couldn't figure out why it didn't work for me.

[@vineetchaudhary6661]

When you 04 ÷ 3 it give you error pls help

[@pietrodante6016]

because of the zero : if you do 4 / 3 = correct result displayed!

[@miyukisakiko]

bro video haru nepali ma ni xa?

[@roshangainju4104]

nepal bata ho??

[@tqnew]

สวัสดีคับทุกคนๆ ทำไรกันอยู่เหรอ งื้องื้อ หยอกเล่นนะคับ อิอิ โทดคับ