根据自然月生成定时任务

您可以使用Python的第三方库`schedule`来完成根据自然月生成定时任务的需求。以下是一个示例代码：

import schedule
import time
import datetime

def job():
    print("I'm working...")

def month_day_range(date):
    first_day = date.replace(day=1)
    last_day = date.replace(day=28) + datetime.timedelta(days=4)
    return first_day, last_day

def schedule_monthly(job_func, year=None, month=None, day=None, hour=None, minute=None, second=None):
    if year is None:
        year = datetime.datetime.now().year
    if month is None:
        month = datetime.datetime.now().month
    if day is None:
        day = datetime.datetime.now().day
    if hour is None:
        hour = datetime.datetime.now().hour
    if minute is None:
        minute = datetime.datetime.now().minute
    if second is None:
        second = datetime.datetime.now().second

    start_date = datetime.datetime(year, month, day, hour, minute, second)
    first_day, last_day = month_day_range(start_date)

    if start_date == first_day:
        schedule.every().month.do(job_func).at(start_date.strftime('%H:%M:%S'))
    else:
        for i in range(1,last_day.day):
            date = datetime.datetime(year, month, i, hour, minute, second)
            if date >= start_date:
                schedule.every().month.do(job_func).at(date.strftime('%H:%M:%S'))

schedule_monthly(job, day=15, hour=12, minute=0, second=0)

while True:
    schedule.run_pending()
    time.sleep(1)

这个示例代码中，`job`函数是需要定期执行的任务。`month_day_range`函数用于确定给定日期所在的自然月的开始日期和结束日期。`schedule_monthly`函数用于根据给定的年月日时分秒，生成在每个自然月的该时间点执行`job`函数的定时任务。最后的while循环用于不断检查是否有需要执行的任务。