import time
class MySnow:
  def __init__(self,dataID):
    self.start = int(time.mktime(time.strptime('2018-01-01 00:00:00', "%Y-%m-%d %H:%M:%S")))
    self.last = int(time.time())
    self.countID = 0
    self.dataID = dataID  # 数据ID，这个自定义或是映射

  def get_id(self):
    # 时间差部分
    now = int(time.time())
    temp = now-self.start
    if len(str(temp)) < 9: # 时间差不够9位的在前面补0
      length = len(str(temp))
      s = "0" * (9-length)
      temp = s + str(temp)
    if now == self.last:
      self.countID += 1  # 同一时间差，序列号自增
    else:
      self.countID = 0  # 不同时间差，序列号重新置为0
      self.last = now
    # 标识ID部分
    if len(str(self.dataID)) < 2:
      length = len(str(self.dataID))
      s = "0" * (2-length)
      self.dataID = s + str(self.dataID)
    # 自增序列号部分
    if self.countID == 99999: # 序列号自增5位满了，睡眠一秒钟
      time.sleep(1)
    countIDdata = str(self.countID)
    if len(countIDdata) < 5: # 序列号不够5位的在前面补0
      length = len(countIDdata)
      s = "0"*(5-length)
      countIDdata = s + countIDdata
    id = str(temp) + str(self.dataID) + countIDdata
    return id

snow = MySnow(dataID="00")
print(snow.get_id())