dates.py 文件源码

def normalize_date(date):
    try:
        # See if date is a `time.struct_time`
        # if so, convert it and account for leapseconds
        tt, date = date, dt(*date[:5] + (min(date[5], 59),))
    except TypeError:
        pass
    else:
        is_dst = None if tt[8] is -1 else tt[8]

        try:
            tm_zone = tt.tm_zone
        except AttributeError:
            tm_zone = None
            tm_gmtoff = None
        else:
            tm_gmtoff = tt.tm_gmtoff

        if tm_zone:
            date = pytz.timezone(tm_zone).localize(date, is_dst=is_dst)
        elif tm_gmtoff:
            offset = tzoffset(None, tm_gmtoff)
            date.replace(tzinfo=offset)

    # Set timezone to UTC
    try:
        tzdate = date.astimezone(utc) if date.tzinfo else utc.localize(date)
    except AttributeError:
        tzdate = date

    return tzdate