python異步實現定時任務和周期任務的方法

def f1(arg1, arg2):
  print('f1', arg1, arg2)
 
 
def f2(arg1):
  print('f2', arg1)
 
 
def f3():
  print('f3')
 
 
def f4():
  print('周期任務', int(time.time()))
 
 
timer = TaskTimer()
# 把任務加入任務隊列
timer.join_task(f1, [1, 2], timing=15.5) # 每天15:30執行
timer.join_task(f2, [3], timing=14) # 每天14:00執行
timer.join_task(f3, [], timing=15) # 每天15:00執行
timer.join_task(f4, [], interval=10) # 每10秒執行1次
# 開始執行（此時才會創建線程）
timer.start()

import datetime
import time
from threading import Thread
from time import sleep
 
 
class TaskTimer:
  __instance = None
 
  def __new__(cls, *args, **kwargs):
    """
    單例模式
    """
    if not cls.__instance:
      cls.__instance = object.__new__(cls)
    return cls.__instance
 
  def __init__(self):
    if not hasattr(self, 'task_queue'):
      setattr(self, 'task_queue', [])
 
    if not hasattr(self, 'is_running'):
      setattr(self, 'is_running', False)
 
  def write_log(self, level, msg):
    cur_time = datetime.datetime.now()
    with open('./task.log', mode='a+', encoding='utf8') as file:
      s = "[" + str(cur_time) + "][" + level + "]  " + msg
      print(s)
      file.write(s + "\n")
 
  def work(self):
 
    """
    處理任務隊列
    """
    while True:
      for task in self.task_queue:
        if task['interval']:
          self.cycle_task(task)
        elif task['timing']:
          self.timing_task(task)
 
      sleep(5)
 
  def cycle_task(self, task):
    """
    周期任務
    """
    if task['next_sec'] <= int(time.time()):
      try:
        task['fun'](*task['arg'])
        self.write_log("正常", "周期任務：" + task['fun'].__name__ + " 已執行")
      except Exception as e:
        self.write_log("異常", "周期任務：" + task['fun'].__name__ + " 函數內部異常：" + str(e))
      finally:
        task['next_sec'] = int(time.time()) + task['interval']
 
  def timing_task(self, task):
    """
    定時任務
    """
    # 今天已過秒數
    today_sec = self.get_today_until_now()
 
    # 到了第二天，就重置任務狀態
    if task['today'] != self.get_today():
      task['today'] = self.get_today()
      task['today_done'] = False
 
    # 第一次執行
    if task['first_work']:
      if today_sec >= task['task_sec']:
        task['today_done'] = True
        task['first_work'] = False
      else:
        task['first_work'] = False
 
    # 今天還沒有執行
    if not task['today_done']:
      if today_sec >= task['task_sec']: # 到點了，開始執行任務
        try:
          task['fun'](*task['arg'])
          self.write_log("正常", "定時任務：" + task['fun'].__name__ + " 已執行")
        except Exception as e:
          self.write_log("異常", "定時任務：" + task['fun'].__name__ + " 函數內部異常：" + str(e))
        finally:
          task['today_done'] = True
          if task['first_work']:
            task['first_work'] = False
 
  def get_today_until_now(self):
    """
    獲取今天凌晨到現在的秒數
    """
    i = datetime.datetime.now()
    return i.hour * 3600 + i.minute * 60 + i.second
 
  def get_today(self):
    """
    獲取今天的日期
    """
    i = datetime.datetime.now()
    return i.day
 
  def join_task(self, fun, arg, interval=None, timing=None):
    """
    interval和timing只能存在1個
    :param fun: 你要調用的任務
    :param arg: fun的參數
    :param interval: 周期任務，單位秒
    :param timing: 定時任務，取值：[0,24)
    """
    # 參數校驗
    if (interval != None and timing != None) or (interval == None and timing == None):
      raise Exception('interval和timing只能選填1個')
 
    if timing and not 0 <= timing < 24:
      raise Exception('timing的取值范圍為[0,24)')
 
    if interval and interval < 5:
      raise Exception('interval最少為5')
 
    # 封裝一個task
    task = {
      'fun': fun,
      'arg': arg,
      'interval': interval,
      'timing': timing,
    }
    # 封裝周期或定時任務相應的參數
    if timing:
      task['task_sec'] = timing * 3600
      task['today_done'] = False
      task['first_work'] = True
      task['today'] = self.get_today()
    elif interval:
      task['next_sec'] = int(time.time()) + interval
 
    # 把task加入任務隊列
    self.task_queue.append(task)
 
    self.write_log("正常", "新增任務：" + fun.__name__)
 
  def start(self):
    """
    開始執行任務
    返回線程標識符
    """
    if not self.is_running:
      thread = Thread(target=self.work)
 
      thread.start()
 
      self.is_running = True
 
      self.write_log("正常", "TaskTimer已開始運行！")
 
      return thread.ident
 
    self.write_log("警告", "TaskTimer已運行，請勿重復啟動！")