获取此日期所在季度的前一季度的最后一天的日期

import datetime

def get_previous_quarter_last_day(date):
    # 获取当前季度
    quarter = (date.month - 1) // 3 + 1

    # 计算前一季度的起始月份和结束月份
    previous_quarter_start_month = (quarter - 2) * 3 + 1
    previous_quarter_end_month = (quarter - 1) * 3

    # 计算前一季度的最后一天的日期
    previous_quarter_last_day = datetime.date(date.year, previous_quarter_end_month, 1) - datetime.timedelta(days=1)

    return previous_quarter_last_day

# 示例使用
date = datetime.date(2022, 9, 15)
previous_quarter_last_day = get_previous_quarter_last_day(date)
print(previous_quarter_last_day)