选择n天前的日期，周末除外

import datetime

def get_previous_date(n):
    current_date = datetime.date.today()
    delta = datetime.timedelta(days=n)
    previous_date = current_date - delta

    # 排除周末
    while previous_date.weekday() >= 5:
        previous_date -= datetime.timedelta(days=1)

    return previous_date

# 示例使用，假设n为7
n = 7
previous_date = get_previous_date(n)
print(previous_date)