**截止文章发布chinese_calendar版本为1.8.0，大约在每年的11月份更新次年的节假日新版本

import datetime
from chinese_calendar import is_workday


def get_pervious_work_day(day: datetime):
    """获取上一个工作日"""
    day = day - datetime.timedelta(days=1)
    if is_workday(day):
        return day
    return get_pervious_work_day(day)

测试周六日：

today = datetime.date.today().replace(day=20)
date = get_pervious_work_day(today)
print(date)

测试2023春节：

today = datetime.date.today().replace(day=28).replace(month=1)
date = get_pervious_work_day(today)
print(date)

测试2023劳动节：

today = datetime.date.today().replace(day=4).replace(month=5)
date = get_pervious_work_day(today)
print(date)

测试2023国庆节：

today = datetime.date.today().replace(day=7).replace(month=10)
date = get_pervious_work_day(today)
print(date)

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Everything is going smoothly.