如何找出两个日期之间的日期差异？

from datetime import date

def date_difference(start_date, end_date):
    start = date(*map(int, start_date.split('-')))
    end = date(*map(int, end_date.split('-')))
    
    year_diff = end.year - start.year
    month_diff = end.month - start.month
    day_diff = end.day - start.day
    
    if month_diff < 0:
        year_diff -= 1
        month_diff += 12
    
    if day_diff < 0:
        month_diff -= 1
        _, days_in_month = monthrange(end.year if month_diff > 0 else end.year - 1, end.month if month_diff > 0 else 12)
        day_diff += days_in_month
    
    return f"日期差异：{year_diff}年 {month_diff}个月 {day_diff}天"

start_date = "2022-01-01"
end_date = "2022-12-31"
print(date_difference(start_date, end_date))