Age Calculator project in Python.

# import all functions from the tkinter

from tkinter import *

#import Message Box module

from tkinter import messagebox

#import the Themed tk module

from tkinter import ttk

#import the time date module

from datetime import date

# Function for clearing the

# contents of all text entry boxes

def clearAll() :

# deleting the content from the entry box

dayField.delete(0, END)

monthField.delete(0, END)

yearField.delete(0, END)

givenDayField.delete(0, END)

givenMonthField.delete(0, END)

givenYearField.delete(0, END)

rsltDayField.delete(0, END)

rsltMonthField.delete(0, END)

rsltYearField.delete(0, END)

# function for checking error

def checkError() :

# if any of the entry field is empty

# then show an error message and clear

# all the entries

if (dayField.get() == "" or monthField.get() == ""

or yearField.get() == "" or givenDayField.get() == ""

or givenMonthField.get() == "" or givenYearField.get() == "") :

# show the error message

messagebox.showerror("Input Error")

# clearAll function calling

clearAll()

return -1

#Function to Calculate the age

def calculateAge():

#check for error

value = checkError()

#if there is a error then value will be - 1

if value==-1:

return

else:

# take a value from the respective entry boxes

# get method returns current text as string

birth_day = int(dayField.get())

birth_month = int(monthField.get())

birth_year = int(yearField.get())

given_day = int(givenDayField.get())

given_month = int(givenMonthField.get())

given_year = int(givenYearField.get())

# if birth date is greater then given birth_month

# then donot count this month and add 30 to the date so

# as to subtract the date and get the remaining days

month =[31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]

if (birth_day > given_day):

given_month = given_month - 1

given_day = given_day + month[birth_month-1]

# if birth month exceeds given month, then

# donot count this year and add 12 to the

# month so that we can subtract and find out

# the difference

if (birth_month > given_month):

given_year = given_year - 1

given_month = given_month + 12

# calculate day, month, year

calculated_day = given_day - birth_day;

calculated_month = given_month - birth_month;

calculated_year = given_year - birth_year;

# calculated day, month, year write back

# to the respective entry boxes

# insert method inserting the

# value in the text entry box.

rsltDayField.insert(10, str(calculated_day))

rsltMonthField.insert(10, str(calculated_month))

rsltYearField.insert(10, str(calculated_year))

#The Driver Code

if __name__ == '__main__':

#Creating the GUI window

root = Tk()

#Setting the background color

root.config(background='light green')

#Setting the name of the GUI applications

root.title('Age Calculator')

#Setting the geometry of the GUI application

root.geometry('525x260')

#Create the Date of birth : Label

dob = Label(root, bg = 'blue')

#Create the Given Date : Label

givenDate = Label(root, text='CURRENT DATE', bg = 'lightblue')

#Create the Given Date : Label

birthDate = Label(root, text='BIRTH DATE', bg = 'lightblue')

# Create a Day : label

day = Label(root, text = 'Day = ', bg = 'light green')

# Create a Month : label

month = Label(root, text = 'Month = ', bg = 'light green')

# Create a Year : label

year = Label(root, text = 'Year = ', bg = 'light green')

# Create a Given Day : label

givenDay = Label(root, text = "Current Day = ", bg = "light green")

# Create a Given Month : label

givenMonth = Label(root, text = "Current Month = ", bg = "light green")

# Create a Given Year : label

givenYear = Label(root, text = "Current Year = ", bg = "light green")

# Create a Years : label

rsltYear = Label(root, text = "Years", bg = "light green")

# Create a Month : label

rsltMonth = Label(root, text = "Month", bg = "light green")

# Create a Days : label

rsltDay = Label(root, text = "Days", bg = "light green")

# Create a text entry box for filling or typing the information.

dayField = Entry(root)

monthField = Entry(root)

yearField = Entry(root)

givenDayField = Entry(root)

givenMonthField = Entry(root)

givenYearField = Entry(root)

rsltYearField = Entry(root)

rsltMonthField = Entry(root)

rsltDayField = Entry(root)

# rsltYearField = Entry(root)

# rsltMonthField = Entry(root)

# rsltDayField = Entry(root)

# Create a Resultant Age Button and attached to calculateAge function

resultantAge = Button(root, text = "CALCULATE AGE", fg = "Black", bg = "Red", command = calculateAge)

# Create a Clear All Button and attached to clearAll function

clearAllEntry = Button(root, text = "Clear All Output", fg = 'Black', bg = 'Red', command = clearAll)

# grid method is used for placing

# the widgets at respective positions

# in table like structure .

dob.grid(row = 0, column = 1)

day.grid(row = 1, column = 0)

dayField.grid(row = 1, column = 1)

month.grid(row = 2, column = 0)

monthField.grid(row = 2, column = 1)

year.grid(row = 3, column = 0)

yearField.grid(row = 3, column = 1)

givenDate.grid(row = 0, column = 4)

birthDate.grid(row = 0, column = 1)

givenDay.grid(row = 1, column = 3)

givenDayField.grid(row = 1, column = 4)

givenMonth.grid(row = 2, column = 3)

givenMonthField.grid(row = 2, column = 4)

givenYear.grid(row = 3, column = 3)

givenYearField.grid(row = 3, column = 4)

resultantAge.grid(row = 4, column = 2)

rsltYear.grid(row = 5, column = 2)

rsltYearField.grid(row = 6, column = 2)

rsltMonth.grid(row = 7, column = 2)

rsltMonthField.grid(row = 8, column = 2)

rsltDay.grid(row = 9, column = 2)

rsltDayField.grid(row = 10, column = 2)

clearAllEntry.grid(row = 12, column = 2)

# Start the GUI

root.mainloop()

No Database is used.