from tkinter import *
from tkinter import messagebox as tsmg
import math
# this is to make a gui window
root = Tk()
# this is the default size of the gui window
root.geometry("400x450")
# this is the title of the gui
root.title("Calcator by Kush Kumar")
# this is to add the icon of the gui
root.wm_iconbitmap('keys.ico')
# this did not allow the user to change the default size of the gui window
root.resizable(False,False)
# this is to change the color of the background of the gui
root.configure(background="light blue")
# this will store the value of the screen for the history
history_list = []
# this is to make a function that will show the history of the calculator
def history(event):
# this is to get the screen value
global screen_value
# this is to get the text that is entered by the user
text = event.widget.cget("text")
if text == "":
screen_value.get()
tsmg.showinfo("HISTORY -- ",history_list)
# this is to make the function through which all the keys will work
def click(event):
# this is to get the screen value
global screen_value
# this is to get the text that is entered by the user
text = event.widget.cget("text")
# this is to print the button which is pressed by the user
print(text)
# these are the conditions through which all the buttons work
if text == "=":
try:
if screen_value.get().isdigit():
value = int(screen_value.get())
else:
# this eval function is used to calculate the basic math functions such as +,-,*,/
value = eval(screen_value.get().replace("%","/100"))
screen_value.set(value)
except:
screen_value.set("Error")
screen.update()
history_list.append(text)
# this is the condition that will check that the button (AC) is pressed or not if pressed then it will clear the screen
elif text == "AC":
# this is to set the screen value null
screen_value.set("")
# this is to update the screen
screen.update()
history_list.append(text)
# this is the condition that will check that the button (<--) is pressed or not if pressed then it will delete the text one by one
elif text == "<--":
# this is to store the screen value in the variable current
current = screen_value.get()
screen_value.set(current[:-1])
screen.update()
history_list.append(text)
# this is the condition that will check that the button (√) is pressed or not if pressed then it will calculate the square root of it
elif text == "√":
try:
# this is to set the value of screen
screen_value.set(screen_value.get() + "√")
# this is to replace this √ with the value of square root which is **0.5
square_rootvalue = eval(screen_value.get().replace("√", "**0.5"))
# this will set the screen value
screen_value.set(square_rootvalue)
except:
# this will check that if the user has entered the wrong value or try to do something which is not correct then it will display error
screen_value.set("Error")
screen.update()
history_list.append(text)
else:
screen_value.set(screen_value.get() + str(text))
screen.update()
history_list.append(text)
# this is to make a variable for the entry widget which will take the string value only
screen_value = StringVar()
# this will set the screen value
screen_value.set("")
# this will make a entry widget in which we can entry the values in our calculator
screen = Entry(root, textvariable=screen_value,font="Times 32 ")
screen.pack(fill=X,padx=5,pady=5)
# these are all the frames in which all the buttons are packed
frame = Frame(root,bg="light blue")
frame.pack()
frame1 = Frame(root,bg="light blue")
frame1.pack()
frame2 = Frame(root,bg="light blue")
frame2.pack()
frame3 = Frame(root,bg="light blue")
frame3.pack()
frame4 = Frame(root,bg="light blue")
frame4.pack()
# these are all the buttons that we have made for our calculator
his = Button(frame,text="",relief=GROOVE,font="Times 15 bold",padx=5,activebackground="light green",command=history)
his.pack(side=LEFT,padx=1,pady=5)
his.bind("",history)
b = Button(frame,text="AC",relief=GROOVE,font="Times 22 bold",padx=5,activebackground="light green")
b.pack(side=LEFT,padx=9,pady=5)
b.bind("",click)
b = Button(frame,text="<--",relief=GROOVE,font="Arial 22 bold",padx=5)
b.pack(side=LEFT,padx=9,pady=5)
b.bind("",click)
b = Button(frame,text="√",relief=GROOVE,font="Times 22 bold",padx=5)
b.pack(side=LEFT,padx=9,pady=5)
b.bind("",click)
b = Button(frame,text="/",relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=LEFT,padx=9,pady=5)
b.bind("",click)
b=Button(frame1,text="*",relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=RIGHT,padx=12,pady=5)
b.bind("",click)
b=Button(frame2,text="-",relief=GROOVE,font="Times 25 bold",padx=10,pady=1)
b.pack(side=RIGHT,padx=12,pady=5)
b.bind("",click)
b=Button(frame3,text="+",relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=RIGHT,padx=12,pady=5)
b.bind("",click)
for i in range(1,4):
b=Button(frame1,text=i,relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=LEFT,padx=12,pady=5)
b.bind("",click)
i+=1
for i in range(4,7):
b=Button(frame2,text=i,relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=LEFT,padx=12,pady=5)
b.bind("",click)
i+=1
for i in range(7,10):
b=Button(frame3,text=i,relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=LEFT,padx=12,pady=5)
b.bind("",click)
i+=1
b = Button(frame4,text="%",relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=LEFT,padx=12,pady=5)
b.bind("",click)
b = Button(frame4,text="0",relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=LEFT,padx=12,pady=5)
b.bind("",click)
b = Button(frame4,text=".",relief=GROOVE,font="Times 22 bold",padx=9)
b.pack(side=LEFT,padx=12,pady=5)
b.bind("",click)
b = Button(frame4,text="=",relief=GROOVE,font="Times 22 bold",padx=9,activebackground="yellow")
b.pack(side=LEFT,padx=12,pady=5)
b.bind("",click)
root.mainloop()