use astropy.time

Modified-History:

    2023-03-09, Bo Zhang, created

    2023-03-09, Bo Zhang, add two time formats

    2023-12-20, Bo Zhang, use astropy.time

"""

import datetime

from astropy import time

def now():

    """Return ISOT8601 format datetime, for time stamps in data products."""

    return datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%S.%f")

    """Return ISOT format datetime using `astropy`."""

    return time.Time.now().isot

def now_dfs():

    """Return ISOT8601 format datetime, for DFS usage only."""

    return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")

# def now():

#     """Return ISOT8601 format datetime, for time stamps in data products."""

#     return datetime.datetime.now().strftime("%Y-%m-%dT%H:%M:%S.%f")

# def now_dfs():

#     """Return ISOT8601 format datetime, for DFS usage only."""

#     return datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")