Python: Age Calculator using Tkinter (original) (raw)

`# import all functions from the tkinter
from tkinter import *

import messagebox class from tkinter

from tkinter import messagebox

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 Age

def calculateAge() :

# check for error
value = checkError()

# if error is occur then return
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))

Driver Code

if name == "main" :

# Create a GUI window
gui = Tk()

# Set the background colour of GUI window  
gui.configure(background = "light green")

# set the name of tkinter GUI window 
gui.title("Age Calculator")

 # Set the configuration of GUI window
gui.geometry("525x260")

# Create a Date Of Birth : label 
dob = Label(gui, text = "Date Of Birth", bg = "blue")

# Create a Given Date : label
givenDate = Label(gui, text = "Given Date", bg = "blue")

# Create a Day : label
day = Label(gui, text = "Day", bg = "light green")

# Create a Month : label
month = Label(gui, text = "Month", bg = "light green")

# Create a Year : label
year = Label(gui, text = "Year", bg = "light green")

# Create a Given Day : label
givenDay = Label(gui, text = "Given Day", bg = "light green")

# Create a Given Month : label
givenMonth = Label(gui, text = "Given Month", bg = "light green")

# Create a Given Year : label
givenYear = Label(gui, text = "Given Year", bg = "light green")

# Create a Years : label
rsltYear = Label(gui, text = "Years", bg = "light green")

# Create a Months : label
rsltMonth = Label(gui, text = "Months", bg = "light green")

# Create a Days : label
rsltDay = Label(gui, text = "Days", bg = "light green")

# Create a Resultant Age Button and attached to calculateAge function
resultantAge = Button(gui, text = "Resultant Age", fg = "Black", bg = "Red", command = calculateAge)

# Create a Clear All Button and attached to clearAll function
clearAllEntry = Button(gui, text = "Clear All", fg = "Black", bg = "Red", command = clearAll)

# Create a text entry box for filling or typing the information.  
dayField = Entry(gui)
monthField = Entry(gui)
yearField = Entry(gui)

givenDayField = Entry(gui)
givenMonthField = Entry(gui)
givenYearField = Entry(gui)

rsltYearField = Entry(gui)
rsltMonthField = Entry(gui)
rsltDayField = Entry(gui)


# 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)

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
gui.mainloop()    

`