Python calculator app 🖩 

# **************************************************************** # Python Calculator # **************************************************************** from tkinter import * def button_press(num): global equation_text equation_text = equation_text + str(num) equation_label.set(equation_text) def equals(): global equation_text try: total = str(eval(equation_text)) equation_label.set(total) equation_text = total except SyntaxError: equation_label.set("syntax error") equation_text = "" except ZeroDivisionError: equation_label.set("arithmetic error") equation_text = "" def clear(): global equation_text equation_label.set("") equation_text = "" window = Tk() window.title("Calculator program") window.geometry("500x500") equation_text = "" equation_label = StringVar() label = Label(window, textvariable=equation_label, font=('consolas',20), bg="white", width=24, height=2) label.pack() frame = Frame(window) frame.pack() button1 = Button(frame, text=1, height=4, width=9, font=35, command=lambda: button_press(1)) button1.grid(row=0, column=0) button2 = Button(frame, text=2, height=4, width=9, font=35, command=lambda: button_press(2)) button2.grid(row=0, column=1) button3 = Button(frame, text=3, height=4, width=9, font=35, command=lambda: button_press(3)) button3.grid(row=0, column=2) button4 = Button(frame, text=4, height=4, width=9, font=35, command=lambda: button_press(4)) button4.grid(row=1, column=0) button5 = Button(frame, text=5, height=4, width=9, font=35, command=lambda: button_press(5)) button5.grid(row=1, column=1) button6 = Button(frame, text=6, height=4, width=9, font=35, command=lambda: button_press(6)) button6.grid(row=1, column=2) button7 = Button(frame, text=7, height=4, width=9, font=35, command=lambda: button_press(7)) button7.grid(row=2, column=0) button8 = Button(frame, text=8, height=4, width=9, font=35, command=lambda: button_press(8)) button8.grid(row=2, column=1) button9 = Button(frame, text=9, height=4, width=9, font=35, command=lambda: button_press(9)) button9.grid(row=2, column=2) button0 = Button(frame, text=0, height=4, width=9, font=35, command=lambda: button_press(0)) button0.grid(row=3, column=0) plus = Button(frame, text='+', height=4, width=9, font=35, command=lambda: button_press('+')) plus.grid(row=0, column=3) minus = Button(frame, text='-', height=4, width=9, font=35, command=lambda: button_press('-')) minus.grid(row=1, column=3) multiply = Button(frame, text='*', height=4, width=9, font=35, command=lambda: button_press('*')) multiply.grid(row=2, column=3) divide = Button(frame, text='/', height=4, width=9, font=35, command=lambda: button_press('/')) divide.grid(row=3, column=3) equal = Button(frame, text='=', height=4, width=9, font=35, command=equals) equal.grid(row=3, column=2) decimal = Button(frame, text='.', height=4, width=9, font=35, command=lambda: button_press('.')) decimal.grid(row=3, column=1) clear = Button(window, text='clear', height=4, width=12, font=35, command=clear) clear.pack() window.mainloop()

Made a simple calculator :) # Calculator program # In python #----------------------------- def addition(x,y): output1 = (x + y) return output1 #----------------------------- def subtraction(x,y): output2 = (x - y) return output2 #----------------------------- def multiplication(x,y): output3 = (x * y) return output3 #----------------------------- def division(x,y): output = (x / y) return output #----------------------------- def square(z): output4 = (z * z) return output4 #----------------------------- def cube(z): output5 = (z * z * z) return output5 #----------------------------- def factorial_pos(z): output6 = 1 for i in range(z,1,-1): output6 = (output6 * i) return output6 #----------------------------- def factorial_neg(z): output7 = -1 for i in range(z,-1): output7 = (output7 * i) return output7 #----------------------------- def exp_pos(b,p): output8 = 1 for i in range(p): output8 = (output8 * b) return output8 #----------------------------- def exp_neg(b,p): output9 = -1 for i in range(p): output9 = (output9 * b) return output9 #----------------------------- def mtp_tables_ps(x,y): print(" Result: ") for i in range(1,y+1): print(f"{x} x {i} = {x*i}") else: print(f''' These are the multiplication tables of {x} with-in the range of {y}''') #----------------------------- def mtp_tables_ng(x,y): print(" Result: ") for i in range(-1,(y-1),-1): print(f"{x} x {i} = {x*i}") else: print(f''' These are the multiplication tables of {x} with-in the range of {y}''') #----------------------------- def operator(c): if(c == ('+')): try: x = float(input("Enter 1st number : ")) y = float(input("Enter 2nd number : ")) except ValueError: print("You can only enter integers.Try to run again!") else: print("Result:") print(addition(x,y)) elif(c == ('-')): try: x = float(input("Enter 1st number : ")) y = float(input("Enter 2nd number : ")) except ValueError: print("You can only enter integers.Try to run again!") else: print("Result:") print(subtraction(x,y)) elif(c == ('*')): try: x = float(input("Enter 1st number : ")) y = float(input("Enter 2nd number : ")) except ValueError: print("You can only enter integers.Try to run again!") else: print("Result:") print(multiplication(x,y)) elif(c == ('/')): try: x = float(input("Enter 1st number : ")) y = float(input("Enter 2nd number : ")) division(x,y) except ValueError: print("You can only enter integers.Try to run again!") except ZeroDivisionError: print("You cant divide by 0.Try to run again!") else: print("Result:") print(division(x,y)) elif(c == ("**")): try: z = float(input("Enter the number to sqaure it : ")) except ValueError: print("You can only enter integers.Try to run again!") else: print("Result:") print(square(z)) elif(c == ("***")): try: z = float(input("Enter the number to cube it : ")) except ValueError: print("You can only enter integers.Try to run again!") else: print("Result:") print(cube(z)) elif(c == ('!')): try: z = int(input("Enter the number to calculate its factorial : ")) if(z > 0): print("Result:") print(factorial_pos(z)) elif(z < 0): print("Result:") print(factorial_neg(z)) else: if(z == 0): print("Result:") print(z*0) else: pass except ValueError: print("You can only enter Integers.Try to run again!") elif(c == ('exp')): try: b = int(input("Enter the base number : ")) p = int(input("Enter the power number : ")) if(p < 0): print("You cant enter negative integers as Power.Try to run again!") elif(b > 0): print("Result:") print(exp_pos(b,p)) elif(b < 0): print("Result:") print(exp_neg(b,p)) elif(b == 0): print("Result:") print(b*0) else: pass except ValueError: print("You can only enter Integers.Try to run again!") elif(c == "mtp"): try: x = int(input("Enter the number for its multiplication tables : ")) y = int(input("Enter the range for the tables : ")) if(y > 0): mtp_tables_ps(x,y) elif(y < 0): mtp_tables_ng(x,y) else: print("Result:") print(x*y) except ValueError: print("You can only enter Integers.Try to run again!") else: print("Invalid operator!") #----------------------------- def new_program(c): c = input('''Enter an operator sign: ('+' , '-' , '*' , '/' , '**' , '***' , '!' , 'exp' , 'mtp') : ''') operator(c) #----------------------------- c = input('''Enter an operator sign: ('+' , '-' , '*' , '/' , '**' , '***' , '!' , 'exp' , 'mtp') : ''') operator(c) print() ctn = input('''Do you want to continue your calculation? Enter 'y' for Yes / 'n' for No. : ''') ctn_cmd = ['y','Y','n','N'] while(ctn == 'y' or ctn == 'Y'): print() new_program(c) print() ctn = input('''Do you want to continue your calculation? Enter 'y' for Yes / 'n' for No. : ''') if(ctn == 'n' or ctn == 'N'): print() print("Thank you for using the calculator. ") else: if(ctn not in ctn_cmd): print("Invalid command!Try to run again.") else: pass #----------------------------- # Code finished successfully

At first I was like "Could you go a little more in-depth with explaining the code?" But. That's when I realized I need to go on my own for deeper explanations. It makes it so much easier and satisfying to get yourself unstuck. Great Lesson Bro!

From deep of my heart. Thanks very much!!!

My buttons are not working even though I checked the video a lot of times and they won’t do anything when pressed. Do you know how to fix this?

Great video!

This video is helpful

Hi bro, I'm a beginner in Python. First of all, thank you for the video, it helped me a lot. Second, I have a question: (I apologize if I make any grammatical mistakes, as I'm not very good at writing English) Why did you use lambda functions for the buttons? When I remove the lambda functions from the buttons and run the program, all the numbers and symbols are displayed without pressing any buttons. What is the reason for this?

I tried to code it myself before this, it went well but I made each function for each number, i probably need to learn more lol

step 3 = done step 1 = done 👍 step 2 = done 🗯 great work again Bro!

cool

Thanks. equation_label = StringVar() is not trivial - I had to look up more info. Is it automatically global, and in scope in all of the defined functions?

Thank you so much...it really helps me❤️

thank you sosososososoososososooooooooooooooooo much ❤

I am not gonna lie it is criminal to be this good at code

thanks for the short and understandable tutorial

YOUR A LIFE SAVER

Thanks so much. I love this video

Amazing content Bro ❤

Thanks a lot BRO

love u king

This really helped me, thanks bro

Bro Code, i wanna ask you, maybe it's stupid question, sorry for that. We have class and examples of class - objects. Question: how to make some visible object with its own properties and methods? For example i'd like to know how to create a text frame, wich i could paint on a form, i mean it's like in programm Photoshop or Adobe InDesign.

tnx ❤❤❤❤

very good

thanks

i love you bro

amazing

mewo (just to doing what u said at the finish)

How would you fix the decimal + decimal issue where it gives you a run on number?

I would like to thank you for your fantastic tutorials, they are helpful, and I have a question how can use both keyboard and button to enter numbers in calculator program.

excelent bro..

Thank you Bro!

thanks so much

Hi ,bro thank you for this video....I'm using pydroid3. I have followed all the steps but is saying line 40, in ,equation_label = stringVar() NameError : name StringVar is not defined.... Help bro...and everyone

Your the best dude🗿

Bien

anyone knows how to add additional feature where you can use your keyboard to use this calculator?

OMG. Thanks❤❤❤

thx bro

More JavaFX Videos Please

Here, in def equals the equation text is an empty string then how it can evaluate.. Anyone please explain

thank u man

what compiler is this?

Bro

Can someone explain to me what the stringvar and lambda does?

I was adding some more operators to the code and I accidentally broke the clear button ._.

I only have 1 problem, whenever I am pressing the buttons the text is not showing. I am currently using pycharm on my mac. Is there a reason for this?

Iran left the chat

Why there is no clear button

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can someone plz tell me why he used lambda function I still don't get it ?

f

C:\Users\gilca\PycharmProjects\pythonProject1\intro\Scripts\python.exe C:\Users\gilca\PycharmProjects\pythonProject1\main.py File "C:\Users\gilca\PycharmProjects\pythonProject1\main.py", line 15 Label = Label(window,textvariable=equation_label, font=('consolas', 20), ^ SyntaxError: '(' was never closed Process finished with exit code 1 I have this error even if I use the original code from the video description . I tried many times and I don t understand what s the problem. I also use : except SyntaxError: equation_label.set("syntax error") equation_text = ""

This is an awesome tutorial bro! Keep it up. As a python learner I want to know how can I bind keyboard keys in this calculator.

hi Bro and all here, the equal function is not working, is it mine alone...

My buttons on calculator don't work, do you now how to fix it?

can someone please tell how to add operators like log, sin, cos, tan from math library in this?

Hi Bro Code, what would i do if i wanted to created an extra button called 'pi' and make it when i press it, it solve pi so show me in the box 3.14... ??? how would i do that

During handling of the above exception, another exception occurred: Traceback (most recent call last): File "C:\Users\Shahzad\PycharmProjectsFIRSTFROG\pythonProject3\almas6.py", line 78, in except "Syntax Error": TypeError: catching classes that do not inherit from BaseException is not allowed Process finished with exit code 1 my program have no error...but still output is this.....what can i do

thank you so much.. i had so much fun creating this project. liked and subscribed

Hi Bro, Quick question about the use of the lambda expression - How are you able to write the lambda expression for the command option this way. The way lambda is used seems to be a departure from how the format for a lambda expression is. Thanks.

i have power "to 2k to 2.1k" but i will give a prayer to yt algo

AttributeError: 'str' object has no attribute 'tk' i am getting this error when i press any buttons and i am not sure why

Pls help me!!! I don't know how to install tkinter at cmd. I write "pip install tkinter" but the pc gives me this error: ERROR: Could not find a version that satisfies the requirement tkinter (from versions: none) ERROR: No matching distribution found for tkinter How can I solve this problem??

Hi Bro Code. is there a way for me to create a pytest with this kind of code?

your try is good thanks

I thought it would take over 300 to 500 lines of code, and then suddenly only 125

commented and subscribed

I really love your channel

Nice

he is on fire mode

Thank you so much bro!

i really love the way that you tech bro i am grateful to be taught by u thank you

noice vids dude!

Thank you from Spain

Love the channel !

Imagine watching your tortural I can't remember very well I like isolated myself not knowing once again I can see such beautiful python lesson may God bless wherever you are ❤❤

realy thanks bro yu are aprofessional and this lesson is very useful thanks again ♥♥

thanks this tutorial was really helpfull

Thankk you bro codee this is a good tkinter study

thnx for the tutorial

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good

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Here is the short cut for creating buttons through 9 to 1, order is 9 to 1 not like in Bro's code as 1 to 9, however you can change order if you want; btns = [] btns_nmbr = -1 for x in range(0, 3): for y in range(0, 3): btns_nmbr += 1 btns.append(Button(frame, text=9 - btns_nmbr, height=4, width=9, font=35, command=lambda btns_nmbr=btns_nmbr: button_press(9 - btns_nmbr))) btns[btns_nmbr].grid(row=x, column=y) for other buttons , i think we still need to define it seperately.

THANK YOU @BroCodez 😘

wow this is very helpful

i don't understand why we need to put the button commands as lambda functions. aren't they already functions? why can't we just type "command=button_press()". what does lambda change in this case?