画面:如何获得过去4周中星期几的移动平均值？

import datetime

def get_weekday_average(weekday):
    # 获取当前日期
    today = datetime.date.today()

    # 计算过去4周的日期范围
    date_ranges = []
    for i in range(4):
        start_date = today - datetime.timedelta(days=7*(i+1))
        end_date = today - datetime.timedelta(days=7*i)
        date_ranges.append((start_date, end_date))

    # 统计每个星期几出现的次数
    count = 0
    for date_range in date_ranges:
        start_date, end_date = date_range
        current_date = start_date
        while current_date <= end_date:
            if current_date.weekday() == weekday:
                count += 1
            current_date += datetime.timedelta(days=1)

    # 计算移动平均值
    average = count / 4

    return average

# 示例调用
weekday = 0  # 0代表星期一，1代表星期二，以此类推
average = get_weekday_average(weekday)
print(f"过去4周中星期{weekday+1}的移动平均值为：{average}")