import sys
from tkinter import *

root = Tk()
frame = Frame(root)
frame.pack()

def clear():
    global operator
    operator=""
    text_Input.set("")

def buttonClick(numbers):
    global operator
    operator= operator+str(numbers)
    text_Input.set(operator)

def buttonEqual():
    global operator
    equal=str(eval(operator))
    text_Input.set(equal)
    operator=""

operator=""
root.title("Calculator")
text_Input =StringVar()



#DISPLAY
def display():
    topframe = Frame(root)
    topframe.pack(side = TOP)

    txtDisplay=Entry(frame, textvariable= text_Input, bd= 50, insertwidth= 0, font= 40)
    txtDisplay.pack(side= TOP)

#BOTTOM ROW OF NUMBERS AND FUNCTIONS
def bot_row():
    frame4 = Frame(root)
    frame4.pack(side = TOP)

    buttonzero= Button(frame4, padx= 44, pady= 15, bd=8, text= "0", fg="green",bg="red", command= lambda:buttonClick(0))
    buttonzero.pack(side =LEFT)
    buttonsubtract= Button(frame4, padx= 15, pady= 15, bd=8, text= "-", fg="green",bg="red", command= lambda:buttonClick("-"))
    buttonsubtract.pack(side =LEFT)
    buttonaddition= Button(frame4, padx= 13, pady= 15, bd=8, text= "+", fg="green",bg="red", command= lambda:buttonClick("+"))
    buttonaddition.pack(side =LEFT)
    buttonequal= Button(frame4, padx= 14, pady= 15, bd=8, text= "=", fg="green",bg="red", command= lambda:buttonEqual())
    buttonequal.pack(side =LEFT
)


#BOTTWO ROW OF NUMBERS AND FUNCTIONS
def bottwo_row():
    frame3 = Frame(root)
    frame3.pack(side = TOP)

    buttonone= Button(frame3,padx= 15, pady= 15, bd=8, text= "1", fg="green", bg="red", command= lambda:buttonClick(1))
    buttonone.pack(side =LEFT)
    buttontwo= Button(frame3,padx= 15, pady= 15, bd=8, text= "2", fg="green", bg="red", command= lambda:buttonClick(2))
    buttontwo.pack(side =LEFT)
    buttonthree= Button(frame3,padx= 15, pady= 15, bd=8, text= "3", fg="green", bg="red", command= lambda:buttonClick(3))
    buttonthree.pack(side =LEFT)
    buttonclosebracket= Button(frame3,padx= 15, pady= 15, bd=8, text= ")", fg="green", bg="red", command= lambda:buttonClick(")"))
    buttonclosebracket.pack(side =LEFT)
    buttondivision= Button(frame3, padx= 15, pady= 15, bd=8, text= "/", fg="green", bg="red", command= lambda:buttonClick("/"))
    buttondivision.pack(side =LEFT)

#BOTTHREE ROW OF NUMBERS AND FUNCTIONS
def botthree_row():
    frame2 = Frame(root)
    frame2.pack(side = TOP)

    buttonfour= Button(frame2,padx= 15, pady= 15, bd=8, text= "4", fg="green", bg="red", command= lambda:buttonClick(4))
    buttonfour.pack(side =LEFT)
    buttonfive= Button(frame2,padx= 15, pady= 15, bd=8, text= "5", fg="green", bg="red", command= lambda:buttonClick(5))
    buttonfive.pack(side =LEFT)
    buttonsix= Button(frame2,padx= 15, pady= 15, bd=8, text= "6", fg="green", bg="red", command= lambda:buttonClick(6))
    buttonsix.pack(side =LEFT)
    buttonopenbracket= Button(frame2, padx= 15,pady= 15, bd=8, text= "(", fg="green", bg="red", command= lambda:buttonClick("("))
    buttonopenbracket.pack(side =LEFT)
    buttonmultiply= Button(frame2, padx= 15, pady= 15, bd=8, text= "*", fg="green", bg="red", command= lambda:buttonClick("*"))
    buttonmultiply.pack(side =LEFT)

#BOTFOUR OF NUMBERS AND FUNCTIONS
def botfour_row():
    frame1 = Frame(root)
    frame1.pack(side = TOP)

    buttonseven= Button(frame1,padx= 15, pady= 15, bd=8, text= "7", fg="green", bg="red", command= lambda:buttonClick(7))
    buttonseven.pack(side =LEFT)
    buttoneight= Button(frame1,padx= 15, pady= 15, bd=8, text= "8", fg="green", bg="red", command= lambda:buttonClick(8))
    buttoneight.pack(side =LEFT)
    buttonnine= Button(frame1,padx= 15, pady= 15, bd=8, text="9", fg= "green", bg="red", command= lambda:buttonClick(9))
    buttonnine.pack(side =LEFT)
    buttonclear= Button(frame1,padx=35, pady= 15, bd=8, text= "CLR", fg="green", bg="red2", command= lambda:clear())
    buttonclear.pack(side =LEFT)

display()
bot_row()
bottwo_row()
botthree_row()
botfour_row()