Scripty Script

Universal Age & Birth Date Calculator Python Script

Written by

Geoff

in

This script calculates an age in years, months, and days from a given date of birth or determines an approximate birth date based on an exact age input.

The script utilizes the python-dateutil library, which extends Python’s standard datetime module by offering the relativedelta class for sophisticated date arithmetic; install it using pip3 install python-dateutil if it’s not already available.

Click to view script… 
#!/usr/bin/env python3
from datetime import datetime
try:
    from dateutil.relativedelta import relativedelta
except ImportError:
    print("This script requires the 'python-dateutil' module. Install it via 'pip3 install python-dateutil'")
    exit(1)

def calculate_age(birth_date, current_date):
    """Calculate the difference between two dates as (years, months, days) using relativedelta."""
    delta = relativedelta(current_date, birth_date)
    return delta.years, delta.months, delta.days

def main():
    print("Select an option:")
    print("1. Calculate an age from a date of birth")
    print("2. Calculate a birth date from an exact age")
    choice = input("Enter 1 or 2: ").strip()
    
    today = datetime.today()
    
    if choice == "1":
        dob_str = input("Enter a date of birth (YYYY-MM-DD): ").strip()
        try:
            birth_date = datetime.strptime(dob_str, "%Y-%m-%d")
        except ValueError:
            print("Invalid date format. Please use YYYY-MM-DD.")
            exit(1)
        
        years, months, days = calculate_age(birth_date, today)
        print(f"Calculated age: {years} years, {months} months, and {days} days.")
    
    elif choice == "2":
        print("Enter an exact age as three numbers separated by spaces.")
        print("For example, if the age is 25 years, 4 months, and 15 days, type: 25 4 15")
        age_input = input("Exact age (years months days): ").strip()
        parts = age_input.split()
        if len(parts) != 3:
            print("Invalid input. Please enter three integers separated by spaces.")
            exit(1)
        try:
            years = int(parts[0])
            months = int(parts[1])
            days = int(parts[2])
        except ValueError:
            print("Invalid input. Please ensure you enter numbers for years, months, and days.")
            exit(1)
        
        birth_date = today - relativedelta(years=years, months=months, days=days)
        print("Calculated birth date is approximately:", birth_date.strftime("%Y-%m-%d"))
    
    else:
        print("Invalid option selected.")

if __name__ == '__main__':
    main()

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