# -*- coding:utf-8 -*-
import datetime

def to_str_datetime():
    return datetime.datetime.now().strftime('%Y-%m-%d_%H%M%S%f')
# -*- coding:utf-8 -*-
import datetime

def to_str_datetime():
    return datetime.datetime.now().strftime('%Y-%m-%d_%H%M%S%f')
# -*- coding:utf-8 -*-