generic.py 文件源码

def is_dst(zonename):
    """Check if current time in a time zone is in dst.

    From: http://stackoverflow.com/a/19778845/1489738
    """
    tz = pytz.timezone(zonename)
    now = pytz.utc.localize(datetime.datetime.utcnow())
    return now.astimezone(tz).dst() != datetime.timedelta(0)