Working with Date and Time - Python Programming Exercise

from datetime import datetime

def get_user_input():
    """Prompt the user for a date and time input."""
    date_str = input("Enter a date and time (format: YYYY-MM-DD HH:MM:SS): ")
    
    # Try to parse the date string
    try:
        user_date = datetime.strptime(date_str, '%Y-%m-%d %H:%M:%S')
        return user_date
    except ValueError:
        print("Invalid date or time format. Please use the format: YYYY-MM-DD HH:MM:SS")
        return None

def calculate_time_difference(user_date):
    """Calculate the difference between the current date and time and the user input."""
    current_date = datetime.now()
    time_difference = current_date - user_date
    return current_date, time_difference

def format_datetime(datetime_object):
    """Return a string with the formatted date and time."""
    # Various formats
    formatted = {
        "default": datetime_object.strftime('%Y-%m-%d %H:%M:%S'),
        "short": datetime_object.strftime('%m/%d/%Y'),
        "long": datetime_object.strftime('%A, %B %d, %Y %I:%M:%S %p'),
        "iso": datetime_object.isoformat()
    }
    return formatted

def main():
    # Get user input
    user_date = get_user_input()
    
    if user_date is None:
        return
    
    # Calculate the current date and time
    current_date, time_difference = calculate_time_difference(user_date)
    
    # Format and display the current date and time
    formatted_current = format_datetime(current_date)
    
    # Display the user input date and time
    formatted_user_date = format_datetime(user_date)
    
    # Output the formatted results
    print("\nCurrent Date and Time (Formatted):")
    print(f"Default: {formatted_current['default']}")
    print(f"Short: {formatted_current['short']}")
    print(f"Long: {formatted_current['long']}")
    print(f"ISO: {formatted_current['iso']}")
    
    print("\nYour Input Date and Time (Formatted):")
    print(f"Default: {formatted_user_date['default']}")
    print(f"Short: {formatted_user_date['short']}")
    print(f"Long: {formatted_user_date['long']}")
    print(f"ISO: {formatted_user_date['iso']}")
    
    # Display the time difference
    print(f"\nTime Difference: {time_difference}")

# Run the program
if __name__ == "__main__":
    main()

 Output

Enter a date and time (format: YYYY-MM-DD HH:MM:SS): 2024-12-25 15:30:00

Current Date and Time (Formatted):
Default: 2024-12-27 10:30:15
Short: 12/27/2024
Long: Thursday, December 27, 2024 10:30:15 AM
ISO: 2024-12-27T10:30:15

Your Input Date and Time (Formatted):
Default: 2024-12-25 15:30:00
Short: 12/25/2024
Long: Wednesday, December 25, 2024 03:30:00 PM
ISO: 2024-12-25T15:30:00

Time Difference: 1 day, 19:00:15