CalculatorTkinter.py

from tkinter import *

root = Tk()

root.title("Calculator")

e=Entry(root,width=40,borderwidth=5)
e.grid(row=0,column=0,columnspan=3,padx=10,pady=10)

def button_click(number):
    #e.delete(0,END)
    current = e.get()
    e.delete(0, END)
    e.insert(0,str(current)+ str(number))

def button_clear():
    e.delete(0,END)

def button_add():
    first_number = e.get()
    global f_num
    global a
    a=1
    f_num = int(first_number)
    e.delete(0,END)

def button_equal():
    second_number = e.get()
    e.delete(0,END)
    if a==1:
        e.insert(0,f_num+int(second_number))
    elif a==2:
        e.insert(0,f_num-int(second_number))
    elif a==3:
        e.insert(0,f_num*int(second_number))
    elif a==4:
        e.insert(0,f_num/int(second_number))

        
def button_subtract():
    """first_number = e.get()
    f_num = int(first_number)
    a=2
    e.delete(0,END)"""
    first_number = e.get()
    global f_num
    global a
    a=2
    f_num = int(first_number)
    e.delete(0,END)

def button_multiply():
    first_number = e.get()
    global f_num
    global a
    a=3
    f_num = int(first_number)
    e.delete(0,END)

def button_divide():
    first_number = e.get()
    global f_num
    global a
    a=4
    f_num = int(first_number)
    e.delete(0,END)
    

button_1 = Button(root,text="1",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(1))
button_2 = Button(root,text="2",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(2))
button_3 = Button(root,text="3",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(3))
button_4 = Button(root,text="4",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(4))
button_5 = Button(root,text="5",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(5))
button_6 = Button(root,text="6",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(6))
button_7 = Button(root,text="7",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(7))
button_8 = Button(root,text="8",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(8))
button_9 = Button(root,text="9",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(9))
button_0 = Button(root,text="0",padx=40,pady=20,bg="#05b5d4",command=lambda:button_click(0))

button_add = Button(root,text='+',padx=39,pady=20,bg="#14a412",command=button_add)
button_equal = Button(root,text='=',padx=88,pady=20,bg="#e54200",command=button_equal)
button_clear = Button(root,text='Clear',padx=79,pady=20,bg="#e54200",command=button_clear)

button_subtract = Button(root,text='-',padx=41,pady=20,bg="#14a412",command=button_subtract)
button_multiply = Button(root,text='*',padx=40,pady=20,bg="#14a412",command=button_multiply)
button_divide = Button(root,text='/',padx=41,pady=20,bg="#14a412",command=button_divide)


button_1.grid(row=3,column=0)
button_2.grid(row=3,column=1)
button_3.grid(row=3,column=2)

button_4.grid(row=2,column=0)
button_5.grid(row=2,column=1)
button_6.grid(row=2,column=2)

button_7.grid(row=1,column=0)
button_8.grid(row=1,column=1)
button_9.grid(row=1,column=2)

button_0.grid(row=4,column=0)
button_add.grid(row=5,column=0)
button_clear.grid(row=4,column=1,columnspan=2)
button_equal.grid(row=5,column=1,columnspan=2)

button_subtract.grid(row=6,column=0)
button_multiply.grid(row=6,column=1)
button_divide.grid(row=6,column=2)


    
#mybutton=Button(root,text='Submit', command=myClick,fg='blue',bg='lightgreen')


root.mainloop()