如何计算两个日期之间的差值和剩余天数的百分比？

from datetime import datetime

def calculate_date_difference(start_date, end_date):
    # 计算日期差值
    date_format = "%Y-%m-%d"
    start_date = datetime.strptime(start_date, date_format)
    end_date = datetime.strptime(end_date, date_format)
    date_difference = (end_date - start_date).days

    # 计算剩余天数的百分比
    current_date = datetime.now()
    remaining_days = (end_date - current_date).days
    percentage = (remaining_days / date_difference) * 100

    return date_difference, percentage

# 示例用法
start_date = "2022-01-01"
end_date = "2022-12-31"
difference, percentage = calculate_date_difference(start_date, end_date)

print("日期差值：", difference)
print("剩余天数百分比：", percentage)