bark.py 文件源码

def timestamp_to_datetime(obj):
    """Converts an object to a `datetime.datetime` object.

    Note that because floating point values are approximate, some conversions
    may not be reversible.

    Args:
        obj: may be any of the following:

            1. `datetime.datetime` object
            2. Arrow object
            3. ISO 8601 string
            4. `time.struct_time` object
            5. integer (epoch time)
            6. float (epoch time)
            7. 2-tuple of integers (seconds and microseconds, epoch time)

    Returns:
        datetime.datetime: (local) timezone-aware object

    Raises:
        TypeError: if `obj` cannot be interpreted according to the list above
    """
    import numbers
    from time import mktime, struct_time
    if isinstance(obj, datetime):
        dt = obj
    elif isinstance(obj, arrow.Arrow):
        dt = obj.datetime
    elif isinstance(obj, str):
        dt = arrow.get(obj).datetime
    elif isinstance(obj, struct_time):
        dt = mktime(obj)
    elif isinstance(obj, numbers.Number):
        dt = datetime.fromtimestamp(obj)
    elif hasattr(obj, '__getitem__'):
        dt = datetime.fromtimestamp(obj[0])
        dt += timedelta(microseconds=int(obj[1]))
    else:
        raise TypeError("unable to convert %s to timestamp" % obj)
    return dt