根据给定的日期计算周期

from datetime import datetime

def calculate_period(start_date, end_date):
    start = datetime.strptime(start_date, "%Y-%m-%d")
    end = datetime.strptime(end_date, "%Y-%m-%d")
    
    delta = end - start
    
    days = delta.days
    weeks = days // 7
    months = (end.year - start.year) * 12 + end.month - start.month
    years = end.year - start.year
    
    return {
        "days": days,
        "weeks": weeks,
        "months": months,
        "years": years
    }

# 示例使用
start_date = "2020-01-01"
end_date = "2023-04-15"
period = calculate_period(start_date, end_date)
print(period)

try:
    start = datetime.strptime(start_date, "%Y-%m-%d")
    end = datetime.strptime(end_date, "%Y-%m-%d")
except ValueError as e:
    print(f"日期格式错误: {e}")

from dateutil.relativedelta import relativedelta

def calculate_period_advanced(start_date, end_date):
    start = datetime.strptime(start_date, "%Y-%m-%d")
    end = datetime.strptime(end_date, "%Y-%m-%d")
    
    delta = relativedelta(end, start)
    
    return {
        "years": delta.years,
        "months": delta.months,
        "days": delta.days
    }