import time
import datetime

YY_MM_DD_HH_MM_SS = "%Y-%m-%d %H:%M:%S"
YMDHMSF = "%Y%m%d%H%M%S%f"


def generate_timestamp():
    """根据当前时间获取时间戳，返回整数"""
    return int(time.time())


def now_date_to_str(fmt=None):
    if fmt is None:
        fmt = YY_MM_DD_HH_MM_SS
    return datetime.datetime.now().strftime(fmt)

if __name__=="__main__":
    print(now_date_to_str(YMDHMSF))