<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def hex_timestamp_to_datetime(hex_timestamp):
 """Converts hex timestamp to a datetime object. datetime.datetime(2015, 6, 25, 8, 34, 1) datetime.datetime(2015, 6, 25, 8, 34, 1) datetime.datetime(2015, 6, 25, 8, 34, 1) """

    if not hex_timestamp.startswith('0x'):
        hex_timestamp = '0x{0}'.format(hex_timestamp)

    return datetime.fromtimestamp(int(hex_timestamp, 16))