GUI_Calculator.py

import tkinter as tk
from cProfile import label
from calendar import error

def sum(a,b):
    print(a+b)
    result_label = tk.Label(root, text=(a,"+",b,"=",a+b))
    result_label.pack()
def sub(a,b):
    print(a-b)
    result_label2=tk.Label(root,text=(a,"-",b,"=",a-b))
    result_label2.pack()
def mult(a,b):
    print(a*b)
    reuslt_label4=tk.Label(root,text=(a,"x",b,"=",a*b))
    reuslt_label4.pack()
def div(a,b):
    print(a/b)
    result_label3=tk.Label(root,text=(a,"/",b,"=",a/b))
    result_label3.pack()
def error():
    display_label=tk.Label(root,text="Enter correct Expression")
    display_label.pack()
def calci():
    #num1=length_entry.get() for text only
    num1=int(length_entry1.get())
    num2=int(length_entry2.get())
    num3= length_entry3.get()
    if(num3=='+'):
        sum(num1,num2)
    elif(num3=='-'):
        sub(num1,num2)
    elif(num3=='*'):
        mult(num1,num2)
    elif(num3=='/')    :
        div(num1,num2)
    else:
        error()
#creating window
root=tk.Tk()
root.title("Calculator")
root.geometry("400x400")
#to print text
length_label=tk.Label(root,text="Welcome to Gui Calculator")
length_label.pack()
#for fisrt number
length_entry1=tk.Entry(root)
length_entry1.pack(pady=10)

#for second number
length_entry2=tk.Entry(root)
length_entry2.pack(pady=10)
#result

length_entry3=tk.Entry(root)
length_entry3.pack(pady=10)
button=tk.Button(root,text="Calculate",command=calci)
button.pack()
root.mainloop()