Question

In Python

Calculator Write a program that allows the user to enter two numbers and then adds, subtracts, divides or multiplies them when the user clicks on the appropriate button. Make sure you have a Quit button. Modification and requirements”:

_____Window title should be  your name Calculate self.main_window.title("?????")

_____Labels - change the attributes of the color, font, size and bold the answerExample self.label = tkinter.Label(self.main_window, \ text='?????????!', font=(" should Arial", 12, "bold"), fg="blue", bg="pink")Tip: choose a color from the website: colors: http://wiki.tcl.tk/37701

_____Modify Buttons to to have color

_____Put a style to your 4 math buttons and the Quit button: https://www.tutorialspoint.com/python/tk_relief.htm

_____Modify Entry labels to be right aligned (tip: justify=RIGHT)

_____Use the padx and pady to have widgets line up. Ex. self.num1_entry.pack(side='left',padx=5,pady=5) _____Add a quit button that has code to qui

Answer 1

//program to allows user to enter two numbers and then adds, subtracts, divides or multiplies them when the user clicks on the appropriate button//

//Python Code follows as for given question//

from tkinter import *

import math

class Calculator(Frame):

def __init__(self):

self.window = Tk()

self.window.title("Calculator")

# create two labels

self.l1 = Label(self.window,text="First Number")

self.l2 = Label(self.window,text="Second Number")

# to enter the text

self.e1 = Entry(self.window, justify='right')

self.e2 = Entry(self.window, justify='right')

# set the elements in a grid view

self.l1.grid(row=0,sticky=E)

self.l2.grid(row=1,sticky=E)

self.e1.grid(row=0,column=2)

self.e2.grid(row=1,column=2)

self.button_add = Button(self.window, text=" + ",font=(" should Arial", 12, "bold"), fg="blue", bg="pink", command = self.add)

self.button_sub = Button(self.window, text=" - ",font=(" should Arial", 12, "bold"), fg="blue", bg="pink", command = self.sub)

self.button_mul = Button(self.window, text=" * ",font=(" should Arial", 12, "bold"), fg="blue", bg="pink", command = self.mul)

self.button_delete = Button(self.window, text=" Quit ",font=(" should Arial", 12, "bold"), fg="blue", bg="pink", command = self.quit)

self.button_add.grid(row=5,column=1)

self.button_sub.grid(row=5,column=2)

self.button_mul.grid(row=6,column=1)

self.button_delete.grid(row=6,column=2)

self.label_result = Label(self.window,text="Result")

self.entry_result = Entry(self.window)

self.label_result.grid(row=14,sticky=E)

self.entry_result.grid(row=14,column=2)

# to run the window loop infinitely

self.window.mainloop();

def add(self):

# get the two numbers in the entry field

# convert them into float

a = float(self.e1.get())

b = float(self.e2.get())

ans = a + b

# clear the previous contents of e1 and e2

self.e1.delete(0, END)

self.e2.delete(0, END)

self.entry_result.delete(0, END)

# set the miles value in entry_result

self.entry_result.insert(0, str(ans))

def sub(self):

# get the two numbers in the entry field

# convert them into float

a = float(self.e1.get())

b = float(self.e2.get())

ans = a - b

# clear the previous contents of e1 and e2

self.e1.delete(0, END)

self.e2.delete(0, END)

self.entry_result.delete(0, END)

# set the miles value in entry_result

self.entry_result.insert(0, str(ans))

def mul(self):

# get the two numbers in the entry field

# convert them into float

a = float(self.e1.get())

b = float(self.e2.get())

ans = a * b

# clear the previous contents of e1 and e2

self.e1.delete(0, END)

self.e2.delete(0, END)

self.entry_result.delete(0, END)

# set the miles value in entry_result

self.entry_result.insert(0, str(ans))

def quit(self):

# close the app using destroy() function

self.window.destroy()

ob = Calculator()

Sample Output:

Calculator First Number Second Number Quit Result

Calculator First Number 10 Second Number Quit Result

When button is pressed Calculator First Number Second Number Quit Result 7.0

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