Simple Graphical Calculator - Python

Hello readers,

Welcome Again To My Blog. Today, In this tutorials Post, I gonna to show you how we can simply create a simple calculator app using python and Tkinter language.

So, let's Quickly Start.
First, of all copy all below provide code into a script and run it. Actually, I just want to say, 'First Try It! Then We will more further'.

In This Script I tried my best to Create this script more easy for learning and reading..

import Tkinter


# Functions For Doing Functions Automatically & Easily
def iframe(parent):
    store=Tkinter.Frame(parent)
    store.pack(fill='both', expand="yes")
    return store

# Calculation Engine
def dialnum(text):
    if text=="C":
        if len(displayvar.get())!=0:
            value=displayvar.get()
            displayvar.set(value[:-1])

    elif text=="CE":
        displayvar.set('')

    elif text=="=":
        k=displayvar.get()
        try:
            displayvar.set(eval(k))
        except:
            displayvar.set('Error')
    else:
        displayvar.set(displayvar.get()+text)

    return 
    
def ibutton(parent,text):
    store=Tkinter.Button(parent, text=text,bg="powder blue",relief="raised", font=('arial 15 bold'),\
                         width=10,height=2)
    store.pack(side='left',fill='both', expand="yes")
    store['command']=lambda: dialnum(store['text'])
    return store

# Here Creating Parent window
root=Tkinter.Tk(className=" Calculator")

# Here String Variable
displayvar=Tkinter.StringVar()

# Creating Display
displaywidget=Tkinter.Entry(iframe(root), font=('arial 55 bold'),fg="blue",\
    justify="right", relief="sunken",bd=15, textvariable=displayvar )
displaywidget.pack(fill='both', expand="yes", side="top")

# Creating Buttons
button_data=[
    (['C']),
    (['CE']),
    ('7','8','9','(',')'),
    ('4','5','6','*','**'),
    ('1','2','3','/','%'),
    ('.','0','=','+','-')]

# Creating Dialing Pad
keypad=iframe(root)
for i in button_data:
    print i
    storeframe=iframe(keypad)
    storeframe.pack(fill='both', expand="yes", side="top")
    for j in i:
        ibutton(storeframe,j)

# Creating Operater Pad
keypad_1=iframe(root)

# Parent Windows Mainloop
root.mainloop()

import Tkinter Module

import Tkinter

Now, Create A Function To Automate The process of Creating tkinter frame.

# Functions For Doing Functions Automatically &amp; Easily
def iframe(parent):
    store=Tkinter.Frame(parent)
    store.pack(fill='both', expand="yes")
    return store

Create Tkinter Window Object and Trigger Mainloop function.

# Here Creating Parent window
root=Tkinter.Tk(className=" Calculator")

# Here String Variable
displayvar=Tkinter.StringVar()


# Parent Windows Mainloop
root.mainloop()

These lines to Create Frame And Create Tkinter Entry Widget Into that Frame.

# Creating Display
displaywidget=Tkinter.Entry(iframe(root), font=('arial 55 bold'),fg="blue",\
    justify="right", relief="sunken",bd=15, textvariable=displayvar )
displaywidget.pack(fill='both', expand="yes", side="top")

# Creating Buttons
button_data=[
    (['C']),
    (['CE']),
    ('7','8','9','(',')'),
    ('4','5','6','*','**'),
    ('1','2','3','/','%'),
    ('.','0','=','+','-')]

Function To Check Click Button Type And Other Operation To Perform various simple function routine.

# Calculation Engine
def dialnum(text):
    if text=="C":
        if len(displayvar.get())!=0:
            value=displayvar.get()
            displayvar.set(value[:-1])

    elif text=="CE":
        displayvar.set('')

    elif text=="=":
        k=displayvar.get()
        try:
            displayvar.set(eval(k))
        except:
            displayvar.set('Error')
    else:
        displayvar.set(displayvar.get()+text)

    return 
    
def ibutton(parent,text):
    store=Tkinter.Button(parent, text=text,bg="powder blue",relief="raised", font=('arial 15 bold'),\
                         width=10,height=2)
    store.pack(side='left',fill='both', expand="yes")
    store['command']=lambda: dialnum(store['text'])
    return store

Function To Create Dial Pad Buttons Easily


# Creating Dialing Pad
keypad=iframe(root)
for i in button_data:
    print i
    storeframe=iframe(keypad)
    storeframe.pack(fill='both', expand="yes", side="top")
    for j in i:
        ibutton(storeframe,j)

# Creating Operater Pad
keypad_1=iframe(root)

In The End, Assemble All Code And Run It.

import Tkinter


# Functions For Doing Functions Automatically &amp; Easily
def iframe(parent):
    store=Tkinter.Frame(parent)
    store.pack(fill='both', expand="yes")
    return store

# Calculation Engine
def dialnum(text):
    if text=="C":
        if len(displayvar.get())!=0:
            value=displayvar.get()
            displayvar.set(value[:-1])

    elif text=="CE":
        displayvar.set('')

    elif text=="=":
        k=displayvar.get()
        try:
            displayvar.set(eval(k))
        except:
            displayvar.set('Error')
    else:
        displayvar.set(displayvar.get()+text)

    return 
    
def ibutton(parent,text):
    store=Tkinter.Button(parent, text=text,bg="powder blue",relief="raised", font=('arial 15 bold'),\
                         width=10,height=2)
    store.pack(side='left',fill='both', expand="yes")
    store['command']=lambda: dialnum(store['text'])
    return store

# Here Creating Parent window
root=Tkinter.Tk(className=" Calculator")

# Here String Variable
displayvar=Tkinter.StringVar()

# Creating Display
displaywidget=Tkinter.Entry(iframe(root), font=('arial 55 bold'),fg="blue",\
    justify="right", relief="sunken",bd=15, textvariable=displayvar )
displaywidget.pack(fill='both', expand="yes", side="top")

# Creating Buttons
button_data=[
    (['C']),
    (['CE']),
    ('7','8','9','(',')'),
    ('4','5','6','*','**'),
    ('1','2','3','/','%'),
    ('.','0','=','+','-')]

# Creating Dialing Pad
keypad=iframe(root)
for i in button_data:
    print i
    storeframe=iframe(keypad)
    storeframe.pack(fill='both', expand="yes", side="top")
    for j in i:
        ibutton(storeframe,j)

# Creating Operater Pad
keypad_1=iframe(root)

# Parent Windows Mainloop
root.mainloop()

I hope, You all Guyx Enjoyed It.

To Download Raw Script click here..

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