Code for How to Make an Age Calculator in Python Tutorial

`age_calculator_cli.py`

``````from datetime import date

def calculate_age(day, month, year):
# we are getting the current date using the today()
today = date.today()
# convering year, month and day into birthdate
birthdate = date(year, month, day)
# calculating the age
age = today.year - birthdate.year - ((today.month, today.day) < (birthdate.month, birthdate.day))
# return the age value
return age

# the try/except block
# the try will execute if there are no exceptions
try:
# we are getting day, month and year using input() function
day = input('Enter day:')
month = input('Enter month:')
year = input('Enter year:')
# creating a variable called calculated_age and we are also calling the claculate_age function
age_result = calculate_age(int(day), int(month), int(year))
print(f'You are {age_result} years old')

# the except will catch all errors
except:
print(f'Failed to calculate age, either day or month or year is invalid')
``````

`age_calculator_ui.py`

``````from tkinter import *
from tkinter import ttk
from datetime import date
from tkinter.messagebox import showerror

# the function for calculating the age
def calculate_age():
# the try/except block
try:
# getting current date
today = date.today()
# getting day from the day entry
day = int(day_entry.get())
# getting month from the month entry
month = int(month_entry.get())
# getting year from the year entry
year = int(year_entry.get())
# creating a date object
birthdate = date(year, month, day)
# calculating the age
age = today.year - birthdate.year - ((today.month, today.day) < (birthdate.month, birthdate.day))
# displaying the age using the age result label
age_result.config(text='You are ' + str(age) + ' years old')
# if an error occurs the showerror window will pop up
except:
showerror(title='Error', message='An error occurred while trying to ' \
'calculate age\nThe following could ' \
'be the causes:\n->Invalid input data\n->An empty field/fields\n'\
'Make sure you enter valid data and fill all the fields')

# creating the main window
window = Tk()
# the title for the window
window.title('Age Calculator')
# the dimensions and position of the windodw
window.geometry('500x260+430+300')
# making the window nonresizabale
window.resizable(height=FALSE, width=FALSE)

# the canvas to contain all the widgets
canvas = Canvas(window, width=500, height=400)
canvas.pack()

# ttk styles for the labels
label_style = ttk.Style()
label_style.configure('TLabel', foreground='#000000', font=('OCR A Extended', 14))

# ttk styles for the button
button_style = ttk.Style()
button_style.configure('TButton', foreground='#000000', font=('DotumChe', 16))

# ttk styles for the entries
entry_style = ttk.Style()
entry_style.configure('TEntry', font=('Dotum', 15))

# the label for displaying the big text
big_label = Label(window, text='AGE CALCULATOR', font=('OCR A Extended', 25))

# placing the big label inside the canvas
canvas.create_window(245, 40, window=big_label)

# label and entry for the day
day_label = ttk.Label(window, text='Day:', style='TLabel')
day_entry = ttk.Entry(window, width=15, style='TEntry')

# label and entry for the month
month_label = ttk.Label(window, text='Month:', style='TLabel')
month_entry = ttk.Entry(window, width=15, style='TEntry')

# label and entry for the year
year_label = ttk.Label(window, text='Year:', style='TLabel')
year_entry = ttk.Entry(window, width=15, style='TEntry')

# the button
calculate_button = ttk.Button(window, text='Calculate Age', style='TButton', command=calculate_age)

# label for display the calculated age
age_result = ttk.Label(window, text='', style='TLabel')

# adding the day label and entry inside the canvas
canvas.create_window(114, 100, window=day_label)
canvas.create_window(130, 130, window=day_entry)

# adding the month label and entry inside the canvas
canvas.create_window(250, 100, window=month_label)
canvas.create_window(245, 130, window=month_entry)

# adding the year label and entry inside the canvas
canvas.create_window(350, 100, window=year_label)
canvas.create_window(360, 130, window=year_entry)

# adding the age_result and entry inside the canvas
canvas.create_window(245, 180, window=age_result)

# adding the calculate button inside the canvas
canvas.create_window(245, 220, window=calculate_button)

# runs the window infinitely until uses closes it
window.mainloop()``````